New debug feature to purge HDF5 cache in case the cache is corrupted.

Implement human readable rdfs labels in Brickschema navigator
Display IFC schema in file selector right hand side panel (#1978 )
2026-08-07 08:21:42 +00:00 · 2022-01-11 11:24:13 +11:00 · 2022-01-11 10:44:52 +11:00 · 2022-01-11 08:52:14 +11:00 · 2022-01-10 17:31:42 +11:00 · 2022-01-10 17:30:49 +11:00
1443 changed files with 484481 additions and 80561 deletions
@@ -1,3 +1,4 @@
 # These are supported funding model platforms

 github: [aothms]
+open_collective: opensourcebim
@@ -0,0 +1,116 @@
+name: CD
+
+on: 
+  push:
+
+
+jobs:
+
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell' &&
+      !startsWith(github.event.head_commit.message, 'Release ') &&
+      !contains(github.event.head_commit.message, 'ci skip')
+    steps:
+    - run: echo ok go
+
+  build:
+    runs-on: ubuntu-20.04
+    needs: activate
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt-get install --no-install-recommends \
+        git cmake gcc g++ libboost-all-dev python3-all-dev swig libpcre3-dev libxml2-dev \
+        libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev libocct-ocaf-dev libocct-visualization-dev libocct-data-exchange-dev \
+        libhdf5-dev libcgal-dev
+
+    -
+      name: ccache
+      uses: hendrikmuhs/ccache-action@v1
+
+    - 
+      name: Build ifcopenshell
+      run: |
+        mkdir build && cd build
+        cmake \
+         -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+         -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+         -DCMAKE_INSTALL_PREFIX=$PWD/install/ \
+         -DCMAKE_BUILD_TYPE=Release \
+         -DCMAKE_PREFIX_PATH=/usr \
+         -DCMAKE_SYSTEM_PREFIX_PATH=/usr \
+         -DBUILD_PACKAGE=On \
+         -DOCC_INCLUDE_DIR=/usr/include/opencascade \
+         -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+         -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3 \
+         -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 \
+         -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.8.so \
+         -DCOLLADA_SUPPORT=Off \
+         -DLIBXML2_INCLUDE_DIR=/usr/include/libxml2 \
+         -DLIBXML2_LIBRARIES=/usr/lib/x86_64-linux-gnu/libxml2.so \
+         -DCGAL_INCLUDE_DIR=/usr/include \
+         -DGMP_INCLUDE_DIR=/usr/include \
+         -DMPFR_INCLUDE_DIR=/usr/include \
+         -DGMP_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+         -DMPFR_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+         -DHDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+         ../cmake
+        make -j $(nproc)
+        make install
+    - 
+      name: Package
+      run: |
+        make package
+      working-directory: build
+    - name: Upload 
+      uses: actions/upload-artifact@v2
+      with:
+        # Artifact name
+        name: ifcos-artifacts
+        # Directory containing files to upload
+        path: build/assets/Ifc*
+
+  deliver:
+    runs-on: ubuntu-20.04
+    needs: build
+    name: Docker Build, Tag, Push
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        lfs: true
+    
+    - name: Download 
+      uses: actions/download-artifact@v2
+      with:
+        # Artifact name
+        name: ifcos-artifacts
+        path: artifacts/
+    -
+      name: Set up QEMU
+      uses: docker/setup-qemu-action@v1
+    -
+      name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1        
+    - 
+      name: Login to Dockerhub
+      uses: docker/login-action@v1 
+      with:
+        username: aecgeeks
+        password: ${{ secrets.DOCKER_HUB_TOKEN }}
+    - 
+      name: Build container image
+      uses: docker/build-push-action@v2
+      with: 
+        context: artifacts
+        repository: aecgeeks/ifcopenshell
+        tags: aecgeeks/ifcopenshell:latest
+        file: ./Dockerfile
+        push: true
@@ -0,0 +1,38 @@
+name: ci-bcf
+
+on:
+  push:
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell' &&
+      contains(github.event.head_commit.message, '[bcf release]')
+    steps:
+      - run: echo ok go
+  upload:
+    needs: activate
+    name: Upload BCF package to Pypi
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
+      - name: Build package
+        run: |
+          cd src/bcf
+          pip install build
+          python -m build
+      - name: Publish package
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_TOKEN }}
+          packages_dir: src/bcf/dist
+
+
+
+
+
@@ -0,0 +1,68 @@
+name: Publish-blenderbim-multiplatform
+
+on:
+  push:
+    paths:
+      - 'src/blenderbim/**'
+      - '.github/workflows/ci-blenderbim-matrix.yml'
+    branches:
+      - v0.7.0
+
+env:
+  major: 0
+  minor: 0
+  name: blenderbim
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell'
+    steps:
+    - name: Set env
+      run: echo ok go
+
+  build:
+    name: ${{ matrix.config.name }}-${{ matrix.pyver }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        pyver: [py37, py39]
+        config:
+          - {
+            name: "Windows Build",
+            short_name: win,
+          }
+          - {
+            name: "Linux Build",
+            short_name: linux
+          }
+          - {
+            name: "MacOS Build",
+            short_name: macos
+          }
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
+        with:
+          python-version: '3.7.7' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+          architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
+      - run: echo ${{ env.DATE }}
+      - name: Get current date
+        id: date
+        run: echo "::set-output name=date::$(date +'%y%m%d')"
+      - name: Compile
+        run: |
+          cp -r src/blenderbim src/blenderbim_${{ matrix.config.short_name }}_${{ matrix.pyver }} &&
+          cd src/blenderbim_${{ matrix.config.short_name }}_${{ matrix.pyver }} &&
+          make dist PLATFORM=${{ matrix.config.short_name }} PYVERSION=${{ matrix.pyver }}
+      - name: Upload Zip file to release
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: src/blenderbim_${{ matrix.config.short_name }}_${{ matrix.pyver }}/dist/blenderbim-${{steps.date.outputs.date}}-${{ matrix.pyver }}-${{ matrix.config.short_name }}.zip
+          asset_name: blenderbim-${{steps.date.outputs.date}}-${{ matrix.pyver }}-${{ matrix.config.short_name }}.zip
+          tag: "blenderbim-${{steps.date.outputs.date}}"
+          overwrite: true
+          body: "Daily developer testing build blenderbim-${{steps.date.outputs.date}}"
@@ -0,0 +1,92 @@
+name: ci
+
+on:
+  push:
+    paths:
+      - 'src/**'
+      - 'test/**'
+      - 'conda/**'
+      - 'cmake/**'
+      - '.github/workflows/ci.yml'
+  pull_request:
+
+jobs:
+  activate:
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'IfcOpenShell/IfcOpenShell' &&
+      !contains(github.event.head_commit.message, 'skip ci')
+    steps:
+      - run: echo ok go
+
+  build:
+    runs-on: ubuntu-20.04
+    needs: activate
+    steps:
+      - uses: actions/checkout@v2
+        with:
+            submodules: recursive
+      - name: Install C++ dependencies
+        run: |
+          sudo apt update
+          sudo apt-get install --no-install-recommends \
+          git cmake gcc g++ \
+          libboost-date-time-dev \
+          libboost-filesystem-dev \
+          libboost-iostreams-dev \
+          libboost-program-options-dev \
+          libboost-regex-dev \
+          libboost-system-dev \
+          libboost-thread-dev \
+          python3-all-dev python3-pip \
+          swig libpcre3-dev libxml2-dev \
+          libtbb-dev nlohmann-json3-dev \
+          libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev libocct-ocaf-dev libocct-visualization-dev libocct-data-exchange-dev \
+          libhdf5-dev libcgal-dev
+          
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1
+
+      - name: Build ifcopenshell
+        run: |
+          mkdir build && cd build
+          cmake \
+               -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+               -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+               -DCMAKE_BUILD_TYPE=Release \
+               -DCMAKE_PREFIX_PATH=/usr \
+               -DCMAKE_SYSTEM_PREFIX_PATH=/usr \
+               -DOCC_INCLUDE_DIR=/usr/include/opencascade \
+               -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+               -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3 \
+               -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 \
+               -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.8.so \
+               -DCOLLADA_SUPPORT=Off \
+               "-DSCHEMA_VERSIONS=2x3;4" \
+               -DGLTF_SUPPORT=On \
+               -DJSON_INCLUDE_DIR=/usr/include \
+               -DCGAL_INCLUDE_DIR=/usr/include \
+               -DGMP_INCLUDE_DIR=/usr/include \
+               -DMPFR_INCLUDE_DIR=/usr/include \
+               -DGMP_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+               -DMPFR_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+               -DHDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+             ../cmake
+          sudo make -j $(nproc)
+          sudo make install
+
+      - name: Install Python dependencies
+        run: |
+          sudo /usr/bin/python -m pip install -U pip
+          sudo /usr/bin/python -m pip install xmlschema numpy lxml
+          sudo /usr/bin/python -m pip install src/bcf
+          sudo /usr/bin/python -m pip install pytest
+          sudo /usr/bin/python -m pip install isodate
+
+      - name: Test
+        run: |
+          cd test
+          sudo /usr/bin/python tests.py
+          cd ../src/ifcopenshell-python
+          mv ifcopenshell ifcopenshell-local # Force testing on installed module
+          make test
@@ -0,0 +1,99 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v[0-9].[0-9].[0-9]*'
+
+jobs:
+  activate:
+    if: github.repository == 'IfcOpenShell/IfcOpenShell'
+    runs-on: ubuntu-latest
+    steps:
+    - run: echo ok go
+  build:
+    needs: activate
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          lfs: true
+      - 
+        name: Update ubuntu
+        run: |
+          sudo apt update
+          sudo apt-get install git cmake gcc g++ libboost1.67-all-dev python3-all-dev swig libpcre3-dev libxml2-dev
+          sudo apt-get install libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev libocct-ocaf-dev libocct-visualization-dev libocct-data-exchange-dev \
+          libhdf5-dev
+          
+      - name: Build
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CHANGELOG_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          mkdir build && cd build
+          cmake \
+           -DCMAKE_INSTALL_PREFIX=$PWD/install/ \
+           -DCMAKE_BUILD_TYPE=Release \
+           -DCMAKE_PREFIX_PATH=/usr \
+           -DCMAKE_SYSTEM_PREFIX_PATH=/usr \
+           -DBUILD_PACKAGE=On \
+           -DOCC_INCLUDE_DIR=/usr/include/opencascade \
+           -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+           -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3 \
+           -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 \
+           -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.8.so \
+           -DCOLLADA_SUPPORT=Off \
+           -DLIBXML2_INCLUDE_DIR=/usr/include/libxml2 \
+           -DLIBXML2_LIBRARIES=/usr/lib/x86_64-linux-gnu/libxml2.so \
+           -DHDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+           ../cmake
+          make -j $(nproc)
+          make install
+      - name: Package
+        id: package
+        run: |
+          make package
+          echo ::set-output name=tgz::$( ls assets/*.tar.gz | head -n 1 | xargs basename )
+          echo ::set-output name=deb::$( ls assets/*.deb | head -n 1 | xargs basename )
+        working-directory: build
+        env:
+          CHANGELOG_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}          
+      - name: Release
+        id: release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: true
+          body: |
+            Changes to this release
+              - add github actions support #1306
+              - add boost depends to ifcopenshell deb packaging
+              - <add more changes here>
+            See more details in the documentation
+#          body_path: build/CHANGELOG.md
+      - name: Upload TGZ
+        id: upload-tgz
+        uses: actions/upload-release-asset@v1
+        env:
+            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
+          asset_path: build/assets/${{ steps.package.outputs.tgz }}
+          asset_name: ${{ steps.package.outputs.tgz }}
+          asset_content_type: application/x-gzip
+      - name: Upload DEB
+        id: upload-deb
+        uses: actions/upload-release-asset@v1
+        env:
+            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
+          asset_path: build/assets/${{ steps.package.outputs.deb }}
+          asset_name: ${{ steps.package.outputs.deb }}
+          asset_content_type: application/vnd.debian.binary-package
@@ -1,7 +1,10 @@
 # Dependency and build folders created by the build scripts
-/deps*/
-/build*/
-/install*/
+/_deps/
+/_build-vs*-x*/
+/_deps-vs*-x*-installed/
+/_installed-vs*-x*/
+/build/
+
 /win/BuildDepsCache*.txt
 # IfcExpressParser residue
 /src/ifcexpressparser/express_parser.py
@@ -13,6 +16,10 @@ __pycache__
 # PyCharm files
 .idea

+#Virtual Env Files
+Pipfile
+Pipfile.lock
+
 # Docs
 /docs/output
 /docs/rst_files
@@ -21,5 +28,32 @@ __pycache__

 # gettext binary translation files
 *.mo
+
 # Vim
 *.swp
+*.swo
+
+# Flask
+instance/*
+!instance/.gitignore
+.webassets-cache
+.env
+*.db
+
+# Byte-compiled / optimized / DLL files
+*.py[cod]
+*$py.class
+
+# pipenv
+Pipfile
+Pipfile.lock
+
+# Database
+*.db
+
+# PyTest
+htmlcov
+.coverage
+
+# Blender
+*.blend1
@@ -5,3 +5,6 @@
 [submodule "src/ifcopenshell-python/ifcopenshell/mvd"]
 	path = src/ifcopenshell-python/ifcopenshell/mvd
 	url = https://github.com/opensourceBIM/python-mvdxml/
+[submodule "src/svgfill"]
+	path = src/svgfill
+	url = https://github.com/IfcOpenShell/svgfill
@@ -1,57 +1,69 @@
 language: cpp
 compiler: gcc
+cache: ccache
 os: linux
-dist: bionic
-sudo: required
-
-before_install:
-  - "sudo add-apt-repository -y ppa:freecad-community/ppa"
-  - sudo apt-get update -qq
-
+dist: focal
+addons:
+  apt:
+    update: true
+    packages:
+    - libboost-date-time-dev
+    - libboost-filesystem-dev
+    - libboost-iostreams-dev
+    - libboost-program-options-dev
+    - libboost-regex-dev
+    - libboost-system-dev
+    - libboost-thread-dev
+    - libocct-data-exchange-dev
+    - libocct-foundation-dev
+    - libocct-modeling-algorithms-dev
+    - libocct-modeling-data-dev
+    - libxml2-dev
+    - nlohmann-json3-dev
+    - opencollada-dev
+    - python3-all-dev
+    - python3-pip
+    - swig
+    - libhdf5-dev

+before_script:
+  - if [ $TRAVIS_OS_NAME == "linux" ]; then ccache -z; fi
+  
 install:
-  - |
-    sudo apt-get install -y \
-    libocct-data-exchange-dev libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev \
-    libboost-system-dev libboost-program-options-dev libboost-regex-dev libboost-thread-dev libboost-date-time-dev libboost-iostreams-dev libboost-filesystem-dev \
-    build-essential cmake python2.7 libpython2.7-dev swig zlib1g liblzma5 opencollada-dev wget apt-transport-https
-  - sudo mkdir -p /usr/include/json/nlohmann/
-  - sudo wget https://github.com/nlohmann/json/releases/download/v3.6.1/json.hpp -O /usr/include/json/nlohmann/json.hpp
-  # - sudo sh -c 'curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -'
-  # - sudo sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list'
-  # - sudo apt-get update -qq && sudo apt-get install -y dart
-  # - export PATH=$PATH:/usr/lib/dart/bin:$HOME/.pub-cache/bin
-  # - git clone https://github.com/KhronosGroup/glTF-Validator && pushd glTF-Validator && pub get && pub global activate --source path ./ && popd
+  # for IDS
+  - python3 -m pip install xmlschema

 script:
  - pwd
-  - cd cmake
-  - mkdir build
-  - cd build
+  - mkdir build && cd build
  - |
    cmake \
+    -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
    -DOCC_INCLUDE_DIR=/usr/include/opencascade \
    -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
-    -DPYTHON_LIBRARY=/usr/lib/python2.7/config-x86_64-linux-gnu/libpython2.7.so \
-    -DPYTHON_INCLUDE_DIR=/usr/include/python2.7 \
-    -DPYTHON_EXECUTABLE=/usr/bin/python2.7 \
-    -DLIBXML2_INCLUDE_DIR=/usr/include/libxml2 \
-    -DLIBXML2_LIBRARIES="/usr/lib/x86_64-linux-gnu/libxml2.so;/lib/x86_64-linux-gnu/libz.so.1;/lib/x86_64-linux-gnu/liblzma.so.5;/usr/lib/x86_64-linux-gnu/libicuuc.so.60;/usr/lib/x86_64-linux-gnu/libicudata.so.60" \
+    -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3 \
+    -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.8 \
+    -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.8.so \
+    "-DSCHEMA_VERSIONS=2x3;4" \
    -DGLTF_SUPPORT=On \
-    -DJSON_INCLUDE_DIR=/usr/include/json \
-    ..
-  - sudo make -j2 install
-    
-  - cd ../../test
-  - /usr/bin/python2.7 tests.py
+    -DJSON_INCLUDE_DIR=/usr/include \
+    -DHDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+    ../cmake
+
+  # TODO: Drop sudo
+  - sudo make -j $(nproc) install
+
+  - cd ../test
+  - /usr/bin/python tests.py
+  - /usr/bin/python ../src/ifcopenshell-python/ifcopenshell/test_ids.py

  - cd input
-  
+
  - /usr/local/bin/IfcConvert -yv acad2010_walls.ifc acad2010_walls.glb
-  # - gltf_validator acad2010_walls.glb
-  
-  - /usr/bin/python2.7 -c "from __future__ import print_function; from io import open; import ifcopenshell; f = ifcopenshell.open('encoding.ifc'); assert list(map(ord, f[1][0])) == [39, 97, 39, 32, 49, 109, 179, 32, 8804, 32, 53, 109, 179, 32, 8805, 32, 49, 48, 109, 179]"
-  
+
+  - /usr/bin/python -c "from io import open; import ifcopenshell; f = ifcopenshell.open('encoding.ifc'); assert list(map(ord, f[1][0])) == [39, 97, 39, 32, 49, 109, 179, 32, 8804, 32, 53, 109, 179, 32, 8805, 32, 49, 48, 109, 179]"
+
  - |
    (for i in *.ifc; do \
    echo $i | tee -a log; \
@@ -64,3 +76,6 @@ script:
  - echo Succeeded
  - grep 0$ statuses
  - grep 0$ statuses | wc -l
+
+after_script:
+  - if [ $TRAVIS_OS_NAME == "linux" ]; then ccache -s; fi
@@ -1,7 +1,7 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

@@ -618,4 +618,4 @@ an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.

-                     END OF TERMS AND CONDITIONS
+                     END OF TERMS AND CONDITIONS
@@ -1,7 +1,7 @@
                   GNU LESSER GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

@@ -0,0 +1,37 @@
+# -*- mode: Dockerfile -*-
+
+FROM ubuntu:focal
+
+ARG CHANNEL
+ENV CHANNEL=${CHANNEL:-latest}
+RUN apt-get update \
+    && apt-get install -y \
+    vim \
+    ssh \
+    sudo \
+    wget \
+    software-properties-common ;\
+    rm -rf /var/lib/apt/lists/*
+
+RUN useradd --user-group --create-home --shell /bin/bash IfcOpenShell ;\
+    echo "IfcOpenShell ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+
+
+ENV DEBIAN_FRONTEND=noninteractive        
+RUN echo "deb http://archive.ubuntu.com/ubuntu focal-proposed main restricted" |  tee -a /etc/apt/sources.list; \ 
+    echo "deb http://archive.ubuntu.com/ubuntu focal-proposed universe" |  tee -a /etc/apt/sources.list; \
+    echo "deb http://archive.ubuntu.com/ubuntu focal-proposed multiverse" |  tee -a /etc/apt/sources.list; \
+    apt-get -qq update; \
+    apt-get -y install tzdata dos2unix rsync; \
+    apt-get -y install python3 libxml2 liboce-foundation11 liboce-modeling11 liboce-ocaf11 liboce-visualization11 \
+                     liboce-ocaf-lite11 libpython3.8 libboost-system1.67.0 libboost-program-options1.67.0 \
+                    libboost-regex1.67.0 libboost-thread1.67.0 libboost-date-time1.67.0; \
+    rm -rf /var/lib/apt/lists/* ; 
+
+COPY . /home/IfcOpenShell/
+RUN ls -lrtR /home/IfcOpenShell
+
+RUN dpkg -i /home/IfcOpenShell/*.deb 
+
+USER IfcOpenShell
+
@@ -1,7 +1,9 @@
 IfcOpenShell 
 ============
 IfcOpenShell is an open source ([LGPL]) software library for working with the Industry Foundation Classes ([IFC]) 
-file format. Currently supported IFC releases are [IFC2x3 TC1] and [IFC4 Add2 TC1].
+file format. Extensive geometric support is implemented for the IFC releases [IFC2x3 TC1] and [IFC4 Add2 TC1].
+Support for parsing is provided for IFC4x1, IFC4x2, and the IFC4x3 release candidates. Extending with support for
+arbitrary IFC schemas is possible at compile-time when using C++ and at run-time when using Python.

 For more information, see
 * [http://ifcopenshell.org](http://ifcopenshell.org)  
@@ -13,14 +15,14 @@ Prerequisites
 -------------
 * Git
 * CMake (2.6 or newer)
-* Windows: [Visual Studio] 2008 or newer with C++ toolset (or [Visual C++ Build Tools]) or [MSYS2] + MinGW
+* Windows: [Visual Studio] 2008 to 2019 (2022 not yet supported by dependency CMake) with C++ toolset (or [Visual C++ Build Tools]) or [MSYS2] + MinGW
 * *nix: GCC 4.7 or newer, or Clang (any version)

 Dependencies
 -------------
 * [Boost](http://www.boost.org/)
-* [Open Cascade](http://opencascade.org) - *optional*, but required for building IfcGeom
-  ([official](http://www.opencascade.org/getocc/download/loadocc/), "OCCT", or [community edition](https://github.com/tpaviot/oce), "OCE")  
+* [Open Cascade](https://dev.opencascade.org/) - *optional*, but required for building IfcGeom
+  ([official](https://dev.opencascade.org/release), "OCCT", or [community edition](https://github.com/tpaviot/oce), "OCE")  
  For converting IFC representation items into BRep solids and tesselated meshes
 * [OpenCOLLADA](https://github.com/khronosGroup/OpenCOLLADA/) - *optional*  
  For IfcConvert to be able to write tessellated Collada (.dae) files
@@ -33,7 +35,9 @@ Dependencies
 Building IfcOpenShell
 ---------------------

-**Note:** The path where the source code is cloned to can contain spaces but non-ASCII characters are very likely to cause problems with the build.
+Note 1: The path where the source code is cloned to can contain spaces but non-ASCII characters are very likely to cause problems with the build.
+
+Note 2: If you had not used `git clone --recursive https://github.com/IfcOpenShell/IfcOpenshell.git`, update the submodules by running `git submodule init & git submodule update`.

 ### Compiling on Windows
 The preferred way to fetch and build this project's dependencies is to use the build scripts
@@ -81,17 +85,26 @@ The following instructions are for Ubuntu, modify as required for other operatin
 can be experimented with and studied for pointers for other operating systems, but note that this script is not currently
 meant to be used for a typical IfcOpenShell workspace setup.

-Note: where `make -j` is written, add a number roughly equal to the amount of CPU cores + 1.
+Note 1: It is recommeded to use OCCT for IfcOpenShell. You could use OCE as well, but sometimes it may lag behind OCCT and 
+therefore not compile with the latest IfcOpenShell.
+
+Note 2: where `make -j` is written, add a number roughly equal to the amount of CPU cores + 1.

 **1)** Install most of the prerequisites and dependencies:

-    $ sudo apt-get install git cmake gcc g++ libboost-all-dev
+    $ sudo apt-get install git cmake gcc g++ libboost-all-dev libcgal-dev

-**2a)** Either use an OCE package from your operating system's software repository
+**2a)** Either use an OCCT package from your operating system's software repository
+
+    $ sudo apt-get install libocct-data-exchange-dev libocct-draw-dev libocct-foundation-dev libocct-modeling-algorithms-dev libocct-modeling-data-dev libocct-ocaf-dev libocct-visualization-dev
+
+**2b)** or, if OCCT is not available or the latest code is wanted, obtain and compile OCCT from https://dev.opencascade.org/release
+
+**2c)** or, if you'd like to try using OCE, use the package from your operating system's software repository

    $ sudo apt-get install liboce-foundation-dev liboce-modeling-dev liboce-ocaf-dev liboce-visualization-dev liboce-ocaf-lite-dev

-**2b)** or (if not available, or the latest code is wanted) compile OCE yourself (note that the build takes a long time):
+**2d)** or if OCE is not available, or the latest code is wanted, compile OCE yourself (note that the build takes a long time)

    $ sudo apt-get install libftgl-dev libtbb2 libtbb-dev libgl1-mesa-dev libfreetype6-dev
    $ git clone https://github.com/tpaviot/oce.git
@@ -101,8 +114,6 @@ Note: where `make -j` is written, add a number roughly equal to the amount of CP
    $ make -j
    $ sudo make install

-**2c)** or obtain and compile OCCT from http://www.opencascade.org/getocc/download/loadocc/
-
 **3)** For building IfcConvert with COLLADA (.dae) support (on by default), OpenCOLLADA is needed:

    $ sudo apt-get install libpcre3-dev libxml2-dev
@@ -128,7 +139,13 @@ dependencies' paths. `OCC_INCLUDE_DIR` might be needed to set also. `OPENCOLLADA
    $ cmake ../cmake -DOCC_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/ \
          -DOPENCOLLADA_INCLUDE_DIR="/usr/local/include/opencollada" \
          -DOPENCOLLADA_LIBRARY_DIR="/usr/local/lib/opencollada"  \
-          -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/
+          -DPCRE_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu/ \
+          -DCGAL_INCLUDE_DIR=/usr/include \
+          -DGMP_INCLUDE_DIR=/usr/include \
+          -DMPFR_INCLUDE_DIR=/usr/include \
+          -DGMP_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+          -DMPFR_LIBRARY_DIR=/usr/lib/x86_64-linux-gnu \
+          -DHDF5_SUPPORT=Off
    $ make -j

 If all worked out correctly you can now use IfcOpenShell. See the examples below.
@@ -136,6 +153,34 @@ If all worked out correctly you can now use IfcOpenShell. See the examples below
 **6)** Install the project if wanted:

    $ sudo make install
+    
+### Installing on MacOS Using Homebrew
+
+**1)** Install all dependencies using [Homebrew](https://brew.sh/)
+
+```{shell}
+$ brew install boost swig cmake ftgl cgal gmp libaec opencascade
+```
+
+**2)** Clone the git repo and its submodules
+```{shell}
+$ git clone --recurse-submodules https://github.com/IfcOpenShell/IfcOpenShell.git 
+```
+**3)** Build IfcOpenShell with flags for Homebrew dependencies (```/usr/local/```)
+```{shell}
+$ cd /path/to/IfcOpenShell
+$ mkdir build && cd build
+$ cmake ../cmake -DOCC_LIBRARY_DIR=/usr/local/lib/ \
+      -DOCC_INCLUDE_DIR=/usr/local/include/opencascade/ \
+      -DCOLLADA_SUPPORT=0 \
+      -DCGAL_INCLUDE_DIR=/usr/local/include/ \
+      -DGMP_LIBRARY_DIR=/usr/local/lib/ \
+      -DMPFR_LIBRARY_DIR=/usr/local/lib/
+      
+$ make -j -lboost_options
+```
+
+Note: Make sure to compile using XCode, rather than a ```brew``` installed C/C++ compiler.

 Installing IfcOpenShell with Conda
 ----------------------------------
@@ -151,14 +196,14 @@ Usage examples

 **Invoking IfcConvert from the command line**

-    $ wget ftp://ftp.dds.no/pub/ifc/Munkerud/Munkerud_hus6_BE.zip
-    $ unzip Munkerud_hus6_BE.zip
-    $ ./IfcConvert Munkerud_hus6_BE.ifc
-    $ less Munkerud_hus6_BE.obj
+    $ wget -O duplex.zip https://portal.nibs.org/files/wl/\?id=4DsTgHFQAcOXzFetxbpRCECPbbfUqpgo
+    $ unzip duplex.zip
+    $ ./IfcConvert Duplex_A_20110907_optimized.ifc
+    $ less Duplex_A_20110907_optimized.obj

 **Using the IfcOpenShell Python interface**

-    $ wget -O duplex.zip https://portal.nibs.org/files/wl/?id=4DsTgHFQAcOXzFetxbpRCECPbbfUqpgo
+    $ wget -O duplex.zip https://portal.nibs.org/files/wl/\?id=4DsTgHFQAcOXzFetxbpRCECPbbfUqpgo
    $ unzip duplex.zip
    $ python
    >>> import ifcopenshell
@@ -217,7 +262,44 @@ Usage examples
    >>> # Writing IFC-SPF files to disk:
    >>> f.write("out.ifc")

-[LGPL]: https://github.com/IfcOpenShell/IfcOpenShell/tree/master/COPYING "LGPL"
+Extra tools
+-----------
+
+Also available are a series of utilities that are based on or related to IfcOpenShell.
+
+Those marked with an asterisk are part of IfcOpenShell.
+
+Name | License
+--- | ---
+bcf | LGPL-3.0-or-later
+blenderbim | GPL-3.0-or-later
+bsdd | LGPL-3.0-or-later
+ifc2ca | LGPL-3.0-or-later
+ifc4d | LGPL-3.0-or-later
+ifc5d | LGPL-3.0-or-later
+ifcbimtester | LGPL-3.0-or-later
+ifcblender | LGPL-3.0-or-later\*
+ifccityjson | LGPL-3.0-or-later
+ifcclash | LGPL-3.0-or-later
+ifccobie | LGPL-3.0-or-later
+ifcconvert | LGPL-3.0-or-later\*
+ifccsv | LGPL-3.0-or-later
+ifcdiff | LGPL-3.0-or-later
+ifcfm | LGPL-3.0-or-later
+ifcgeom | LGPL-3.0-or-later\*
+ifcgeom\_schema\_agnostic | LGPL-3.0-or-later\*
+ifcgeomserver | LGPL-3.0-or-later\*
+ifcjni | LGPL-3.0-or-later\*
+ifcmax | LGPL-3.0-or-later\*
+ifcopenshell-python | LGPL-3.0-or-later\*
+ifcparse | LGPL-3.0-or-later\*
+ifcpatch | LGPL-3.0-or-later
+ifcsverchok | GPL-3.0-or-later
+ifcwrap | LGPL-3.0-or-later\*
+qtviewer | LGPL-3.0-or-later\*
+serializers | LGPL-3.0-or-later\*
+
+[LGPL]: https://github.com/IfcOpenShell/IfcOpenShell/tree/master/COPYING.LESSER "LGPL-3.0-or-later"
 [IFC]: https://technical.buildingsmart.org/standards/ifc/ "IFC"
 [IFC2x3 TC1]: https://standards.buildingsmart.org/IFC/RELEASE/IFC2x3/TC1/HTML/ "IFC2x3 TC1"
 [IFC4 Add2 TC1]: https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2_TC1/HTML/ "IFC4 Add2 TC1"
@@ -18,10 +18,18 @@
 ################################################################################

 cmake_minimum_required(VERSION 3.1.3)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)  # not necessary, but encouraged

-project (IfcOpenShell)
+project (IfcOpenShell VERSION 0.7.0)
+
+cmake_policy(SET CMP0048 NEW)
+cmake_policy(SET CMP0074 NEW)
+cmake_policy(SET CMP0078 OLD)
+cmake_policy(SET CMP0086 NEW)
+
+# use extra version to make pre-release using eg semver
+set( EXTRA_VERSION "-alpha.3")

 foreach(max_year RANGE 2014 2030)
 set(max_sdk "$ENV{ADSK_3DSMAX_SDK_${max_year}}")
@@ -34,27 +42,29 @@ endforeach()
 OPTION(COLLADA_SUPPORT "Build IfcConvert with COLLADA support (requires OpenCOLLADA)." ON)
 OPTION(IFCXML_SUPPORT "Build IfcParse with ifcXML support (requires libxml2)." ON)
 OPTION(ENABLE_BUILD_OPTIMIZATIONS "Enable certain compiler and linker optimizations on RelWithDebInfo and Release builds." OFF)
-OPTION(IFCCONVERT_DOUBLE_PRECISION "IfcConvert: Use double precision floating-point numbers." ON)
+OPTION(BUILD_PACKAGE "" OFF)
 OPTION(BUILD_IFCGEOM "Build IfcGeom." ON)
 OPTION(BUILD_DOCUMENTATION "Build IfcOpenShell Documentation." OFF)
 OPTION(BUILD_IFCPYTHON "Build IfcPython." ON)
 OPTION(BUILD_EXAMPLES "Build example applications." ON)
 OPTION(BUILD_GEOMSERVER "Build IfcGeomServer executable." ON)
 OPTION(BUILD_CONVERT "Build IfcConvert executable." ON)
+OPTION(HDF5_SUPPORT "Enable HDF5 support (requires HDF5, zlib)" ON)
 OPTION(USE_VLD "Use Visual Leak Detector for debugging memory leaks, MSVC-only." OFF)
 OPTION(USE_MMAP "Adds a command line options to parse IFC files from memory mapped files using Boost.Iostreams" OFF)
 OPTION(BUILD_SHARED_LIBS "Build IfcParse and IfcGeom as shared libs (SO/DLL)." OFF)
 if (${HAS_MAX})
-OPTION(BUILD_IFCMAX "Build IfcMax, a 3ds Max plug-in, Windows-only." ON)
+OPTION(BUILD_IFCMAX "Build IfcMax, a 3ds Max plug-in, Windows-only." OFF)
 endif()
 if (${BUILD_CONVERT})
 OPTION(GLTF_SUPPORT "Build IfcConvert with glTF support (requires json.hpp)." OFF)
 endif()
 OPTION(USERSPACE_PYTHON_PREFIX "Installs IfcPython for the current user only instead of system-wide." OFF)
+OPTION(ADD_COMMIT_SHA "Add commit sha and branch in version number, warning results in many rebuilds, requires git" OFF)

 # TODO QtViewer is deprecated ATM as it uses the 0.4 API
 # OPTION(BUILD_QTVIEWER "Build IfcOpenShell Qt GUI Viewer (requires Qt 4 framework)." OFF)
-
+include(GNUInstallDirs)
 if((BUILD_CONVERT OR BUILD_GEOMSERVER OR BUILD_IFCPYTHON) AND (NOT BUILD_IFCGEOM))
    message(STATUS "'IfcGeom' is required with current outputs")
    set(BUILD_IFCGEOM ON)
@@ -65,7 +75,7 @@ IF(NOT BINDIR)
    set(BINDIR bin)
 ENDIF()
 IF(NOT IS_ABSOLUTE ${BINDIR})
-    set(BINDIR ${CMAKE_INSTALL_PREFIX}/${BINDIR})
+    set(BINDIR ${CMAKE_INSTALL_BINDIR})
 ENDIF()
 MESSAGE(STATUS "BINDIR: ${BINDIR}")

@@ -73,7 +83,7 @@ IF(NOT INCLUDEDIR)
    set(INCLUDEDIR include)
 ENDIF()
 IF(NOT IS_ABSOLUTE ${INCLUDEDIR})
-    set(INCLUDEDIR ${CMAKE_INSTALL_PREFIX}/${INCLUDEDIR})
+    set(INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR})
 ENDIF()
 MESSAGE(STATUS "INCLUDEDIR: ${INCLUDEDIR}")

@@ -81,11 +91,11 @@ IF(NOT LIBDIR)
    set(LIBDIR lib)
 ENDIF()
 IF(NOT IS_ABSOLUTE ${LIBDIR})
-    set(LIBDIR ${CMAKE_INSTALL_PREFIX}/${LIBDIR})
+    set(LIBDIR ${CMAKE_INSTALL_LIBDIR})
 ENDIF()
 MESSAGE(STATUS "LIBDIR: ${LIBDIR}")

-set(IFCOPENSHELL_LIBARY_DIR "") # for *nix rpaths
+set(IFCOPENSHELL_LIBRARY_DIR "") # for *nix rpaths

 if (BUILD_SHARED_LIBS)
    add_definitions(-DIFC_SHARED_BUILD)
@@ -95,7 +105,7 @@ if (BUILD_SHARED_LIBS)
        # There will be couple hundreds of these so suppress them away, https://msdn.microsoft.com/en-us/library/esew7y1w.aspx
        add_definitions(-wd4251)
    endif()
-    set(IFCOPENSHELL_LIBARY_DIR "${LIBDIR}")
+    set(IFCOPENSHELL_LIBRARY_DIR "${LIBDIR}")
 endif()

 # Create cache entries if absent for environment variables
@@ -113,6 +123,18 @@ UNIFY_ENVVARS_AND_CACHE(LIBXML2_INCLUDE_DIR)
 UNIFY_ENVVARS_AND_CACHE(LIBXML2_LIBRARIES)
 UNIFY_ENVVARS_AND_CACHE(PCRE_LIBRARY_DIR)
 UNIFY_ENVVARS_AND_CACHE(PYTHON_EXECUTABLE)
+UNIFY_ENVVARS_AND_CACHE(HDF5_INCLUDE_DIR)
+UNIFY_ENVVARS_AND_CACHE(HDF5_LIBRARY_DIR)
+UNIFY_ENVVARS_AND_CACHE(HDF5_LIBRARIES)
+UNIFY_ENVVARS_AND_CACHE(BOOST_ROOT)
+UNIFY_ENVVARS_AND_CACHE(BOOST_LIBRARYDIR)
+
+UNIFY_ENVVARS_AND_CACHE(CGAL_INCLUDE_DIR)
+UNIFY_ENVVARS_AND_CACHE(CGAL_LIBRARY_DIR)
+UNIFY_ENVVARS_AND_CACHE(GMP_INCLUDE_DIR)
+UNIFY_ENVVARS_AND_CACHE(GMP_LIBRARY_DIR)
+UNIFY_ENVVARS_AND_CACHE(MPFR_INCLUDE_DIR)
+UNIFY_ENVVARS_AND_CACHE(MPFR_LIBRARY_DIR)

 if (GLTF_SUPPORT AND BUILD_CONVERT)
 UNIFY_ENVVARS_AND_CACHE(JSON_INCLUDE_DIR)
@@ -123,6 +145,7 @@ ELSE()
 	MESSAGE(FATAL_ERROR "Unable to find JSON for Modern C++ header file, aborting")
 ENDIF()
 add_definitions(-DWITH_GLTF)
+set(SWIG_DEFINES ${SWIG_DEFINES} -DWITH_GLTF)
 endif()

 # Set INSTALL_RPATH for target
@@ -142,7 +165,7 @@ ENDMACRO()
 # runtime, when doing running conda-build we pick what conda prepared for us.
 IF(WIN32 AND ("$ENV{CONDA_BUILD}" STREQUAL ""))
 	SET(Boost_USE_STATIC_LIBS ON)
-	SET(Boost_USE_STATIC_RUNTIME ON)
+	SET(Boost_USE_STATIC_RUNTIME OFF)
 	SET(Boost_USE_MULTITHREADED ON)
    # Disable Boost's autolinking as the libraries to be linked to are supplied
    # already by CMake, and wrong libraries would be asked for when code is
@@ -174,14 +197,19 @@ if(USE_MMAP)
    add_definitions(-DUSE_MMAP)
 endif()

+# libxml2 is required for IFCXML (optional) and SVGFILL (mandatory)
+find_package(LibXml2 REQUIRED)
+
 if (IFCXML_SUPPORT)
    add_definitions(-DWITH_IFCXML)
+	set(SWIG_DEFINES ${SWIG_DEFINES} -DWITH_IFCXML)
 endif()

 FIND_PACKAGE(Boost REQUIRED COMPONENTS ${BOOST_COMPONENTS})
 MESSAGE(STATUS "Boost include files found in ${Boost_INCLUDE_DIRS}")
 MESSAGE(STATUS "Boost libraries found in ${Boost_LIBRARY_DIRS}")

+
 # Usage:
 # set(SOME_LIRARIES foo bar)
 # add_debug_variants(SOME_LIRARIES "${SOME_LIRARIES}" d)
@@ -219,51 +247,66 @@ endfunction()
 if(BUILD_IFCGEOM)

 IF(MSVC)
-	add_debug_variants(LIBXML2_LIBRARIES "${LIBXML2_LIBRARIES}" d)
+    add_debug_variants(LIBXML2_LIBRARIES "${LIBXML2_LIBRARIES}" d)
 ENDIF()

-# Find Open CASCADE
+# Open CASCADE
 IF("${OCC_INCLUDE_DIR}" STREQUAL "")
-	SET(OCC_INCLUDE_DIR "/usr/include/oce/" CACHE FILEPATH "Open CASCADE header files")
-	MESSAGE(STATUS "Looking for Open CASCADE include files in: ${OCC_INCLUDE_DIR}")
-	MESSAGE(STATUS "Use OCC_INCLUDE_DIR to specify another directory")
+    FIND_PATH(OCC_INCLUDE_DIR Standard_Version.hxx
+        [PATHS
+            /usr/include/occt
+            /usr/include/oce
+            /usr/include/opencascade
+        ]
+        REQUIRED
+    )
+    IF(OCC_INCLUDE_DIR)
+        MESSAGE(STATUS "Found Open CASCADE include files in: ${OCC_INCLUDE_DIR}")
+    ELSE()
+        MESSAGE(FATAL_ERROR "Unable to find Open CASCADE include directory, specify OCC_INCLUDE_DIR manually.")
+    ENDIF()
 ELSE()
-	SET(OCC_INCLUDE_DIR ${OCC_INCLUDE_DIR} CACHE FILEPATH "Open CASCADE header files")
-	MESSAGE(STATUS "Looking for Open CASCADE include files in: ${OCC_INCLUDE_DIR}")
-ENDIF()
-
-FIND_FILE(gp_Pnt_hxx "gp_Pnt.hxx" ${OCC_INCLUDE_DIR})
-IF(gp_Pnt_hxx)
-	MESSAGE(STATUS "Header files found")
-ELSE()
-	MESSAGE(FATAL_ERROR "Unable to find header files, aborting")
+    SET(OCC_INCLUDE_DIR ${OCC_INCLUDE_DIR} CACHE FILEPATH "Open CASCADE header files")
+    MESSAGE(STATUS "Looking for Open CASCADE include files in: ${OCC_INCLUDE_DIR}")
 ENDIF()

 SET(OPENCASCADE_LIBRARY_NAMES
-	TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO
-	TKFillet TKSTEP TKSTEPBase TKSTEPAttr TKXSBase TKSTEP209 TKIGES TKOffset TKHLR
+    TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO
+    TKFillet TKSTEP TKSTEPBase TKSTEPAttr TKXSBase TKSTEP209 TKIGES TKOffset TKHLR
+    
+    # @todo investigate the exact conditions when this is necessary
+    TKBin
 )

 IF("${OCC_LIBRARY_DIR}" STREQUAL "")
-	SET(OCC_LIBRARY_DIR "/usr/lib/" CACHE FILEPATH "Open CASCADE library files")
-	MESSAGE(STATUS "Looking for Open CASCADE library files in: ${OCC_LIBRARY_DIR}")
-	MESSAGE(STATUS "Use OCC_LIBRARY_DIR to specify another directory")
+    find_library(OCC_LIBRARY TKernel
+        [PATHS
+            /usr/lib
+        ]
+        REQUIRED
+    )
+    IF(OCC_LIBRARY)
+	GET_FILENAME_COMPONENT(OCC_LIBRARY_DIR ${OCC_LIBRARY} PATH)
+        MESSAGE(STATUS "Found Open CASCADE library files in: ${OCC_LIBRARY_DIR}")
+    ELSE()
+        MESSAGE(FATAL_ERROR "Unable find Open CASCADE library directory, specify OCC_LIBRARY_DIR manually.")
+    ENDIF()
 ELSE()
-	SET(OCC_LIBRARY_DIR ${OCC_LIBRARY_DIR} CACHE FILEPATH "Open CASCADE library files")
-	MESSAGE(STATUS "Looking for Open CASCADE library files in: ${OCC_LIBRARY_DIR}")
+    SET(OCC_LIBRARY_DIR ${OCC_LIBRARY_DIR} CACHE FILEPATH "Open CASCADE library files")
+    MESSAGE(STATUS "Looking for Open CASCADE library files in: ${OCC_LIBRARY_DIR}")
 ENDIF()

 FIND_LIBRARY(libTKernel NAMES TKernel TKerneld PATHS ${OCC_LIBRARY_DIR} NO_DEFAULT_PATH)
 IF(libTKernel)
-	MESSAGE(STATUS "Library files found")
+    MESSAGE(STATUS "Required Open Cascade Library files found")
 ELSE()
-	MESSAGE(FATAL_ERROR "Unable to find library files, aborting")
+    MESSAGE(FATAL_ERROR "Unable to find Open Cascade library files, aborting")
 ENDIF()

 # Use the found libTKernel as a template for all other OCC libraries
 # TODO Extract this into macro/function
 foreach(lib ${OPENCASCADE_LIBRARY_NAMES})
-    # Make sure we'll handle the Windows/MSVC debug postfix convetion too.
+    # Make sure we'll handle the Windows/MSVC debug postfix convention too.
    string(REPLACE TKerneld "${lib}" lib_path "${libTKernel}")
    string(REPLACE TKernel "${lib}" lib_path "${lib_path}")
 	list(APPEND OPENCASCADE_LIBRARIES "${lib_path}")
@@ -299,7 +342,7 @@ endif()

 endif(BUILD_IFCGEOM)

-IF(COLLADA_SUPPORT AND BUILD_CONVERT)
+IF(COLLADA_SUPPORT)
 	# Find OpenCOLLADA
 	IF("${OPENCOLLADA_INCLUDE_DIR}" STREQUAL "")
 		MESSAGE(STATUS "No OpenCOLLADA include directory specified")
@@ -331,6 +374,8 @@ IF(COLLADA_SUPPORT AND BUILD_CONVERT)
 	IF(COLLADASWStreamWriter_h)
 		MESSAGE(STATUS "OpenCOLLADA header files found")
 		ADD_DEFINITIONS(-DWITH_OPENCOLLADA)
+		set(SWIG_DEFINES ${SWIG_DEFINES} -DWITH_OPENCOLLADA)
+
 		SET(OPENCOLLADA_LIBRARY_NAMES
 			GeneratedSaxParser MathMLSolver OpenCOLLADABaseUtils OpenCOLLADAFramework OpenCOLLADASaxFrameworkLoader
 			OpenCOLLADAStreamWriter UTF buffer ftoa
@@ -338,7 +383,7 @@ IF(COLLADA_SUPPORT AND BUILD_CONVERT)

 		# Use the found OpenCOLLADAFramework as a template for all other OpenCOLLADA libraries
 		foreach(lib ${OPENCOLLADA_LIBRARY_NAMES})
-            # Make sure we'll handle the Windows/MSVC debug postfix convetion too.
+            # Make sure we'll handle the Windows/MSVC debug postfix convention too.
            string(REPLACE OpenCOLLADAFrameworkd "${lib}" lib_path "${OpenCOLLADAFramework}")
            string(REPLACE OpenCOLLADAFramework "${lib}" lib_path "${lib_path}")
 			list(APPEND OPENCOLLADA_LIBRARIES "${lib_path}")
@@ -377,6 +422,54 @@ IF(COLLADA_SUPPORT AND BUILD_CONVERT)
 	ENDIF()
 ENDIF()

+if(HDF5_SUPPORT)
+    IF("${HDF5_INCLUDE_DIR}" STREQUAL "")
+		MESSAGE(STATUS "No HDF5 include directory specified")
+	ElSE()
+		SET(HDF5_INCLUDE_DIR "${HDF5_INCLUDE_DIR}" CACHE FILEPATH "HDF5 header files")
+	ENDIF()
+	
+    IF("${HDF5_LIBRARY_DIR}" STREQUAL "")
+		MESSAGE(STATUS "No HDF5 library directory specified")
+	ElSE()
+		SET(HDF5_LIBRARY_DIR "${HDF5_LIBRARY_DIR}" CACHE FILEPATH "HDF5 library files")
+	ENDIF()
+
+    if (HDF5_LIBRARY_DIR)
+    	# result of the HDF5 ctest package
+    	
+        if (WIN32)
+        	set(zlib_post lib)
+        	set(lib_ext lib)
+        else()
+        	set(lib_ext a)
+        endif()
+        
+        SET(HDF5_LIBRARIES 
+            "${HDF5_LIBRARY_DIR}/libhdf5_cpp.${lib_ext}"
+            "${HDF5_LIBRARY_DIR}/libhdf5.${lib_ext}"
+            "${HDF5_LIBRARY_DIR}/libz${zlib_post}.${lib_ext}"
+            "${HDF5_LIBRARY_DIR}/libsz.${lib_ext}"
+            "${HDF5_LIBRARY_DIR}/libaec.${lib_ext}"
+        )
+    endif()
+    
+    if (NOT HDF5_LIBRARIES)
+    	# debian default
+    	
+        SET(HDF5_LIBRARIES
+            /usr/lib/x86_64-linux-gnu/hdf5/serial/libhdf5_cpp.so
+            /usr/lib/x86_64-linux-gnu/hdf5/serial/libhdf5.so
+            /usr/lib/x86_64-linux-gnu/libsz.so
+            /usr/lib/x86_64-linux-gnu/libaec.so
+            z dl
+        )
+    endif()
+    
+    add_definitions(-DWITH_HDF5)
+	set(SWIG_DEFINES ${SWIG_DEFINES} -DWITH_HDF5)
+endif()
+
 IF(NOT CMAKE_BUILD_TYPE)
 	SET(CMAKE_BUILD_TYPE "Release")
 ENDIF()
@@ -405,6 +498,14 @@ if(ENABLE_BUILD_OPTIMIZATIONS)
 endif()

 IF(MSVC)
+	# warning due to virtual inheritance
+	ADD_DEFINITIONS(-wd4250)
+	# warning due to select definitions in the schema being redundant
+	ADD_DEFINITIONS(-wd4584)
+	
+	# didn't work well on ifcopenbot, @todo make configurable
+	# add_definitions(/MP)
+
    # Enable solution folders (free VS versions prior to 2012 don't support solution folders)
    if (MSVC_VERSION GREATER 1600)
        set_property(GLOBAL PROPERTY USE_FOLDERS ON)
@@ -424,24 +525,24 @@ IF(MSVC)
 		# Disable overeager and false positives causing C4458 ("declaration of 'indentifier' hides class member"), at least for now.
 		ADD_DEFINITIONS(-wd4458)
 	ENDIF()
-    # Enforce standards-conformance on VS > 2015, older Boost versions fail to compile with this    
+    # Enforce standards-conformance on VS > 2015, older Boost versions fail to compile with this
    if (MSVC_VERSION GREATER 1900 AND (Boost_MAJOR_VERSION GREATER 1 OR Boost_MINOR_VERSION GREATER 66))
        add_definitions(-permissive-)
    endif()
 	# Link against the static VC runtime
    # TODO Make this configurable
-	IF("$ENV{CONDA_BUILD}" STREQUAL "")
-	FOREACH(flag CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL
-			CMAKE_CXX_FLAGS_RELWITHDEBINFO CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-			CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
-		IF(${flag} MATCHES "/MD")
-			STRING(REGEX REPLACE "/MD" "/MT" ${flag} "${${flag}}")
-		ENDIF()
-		IF(${flag} MATCHES "/MDd")
-			STRING(REGEX REPLACE "/MDd" "/MTd" ${flag} "${${flag}}")
-		ENDIF()
-	ENDFOREACH()
-	ENDIF()
+	# IF("$ENV{CONDA_BUILD}" STREQUAL "")
+	# FOREACH(flag CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL
+			# CMAKE_CXX_FLAGS_RELWITHDEBINFO CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+			# CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
+		# IF(${flag} MATCHES "/MD")
+			# STRING(REGEX REPLACE "/MD" "/MT" ${flag} "${${flag}}")
+		# ENDIF()
+		# IF(${flag} MATCHES "/MDd")
+			# STRING(REGEX REPLACE "/MDd" "/MTd" ${flag} "${${flag}}")
+		# ENDIF()
+	# ENDFOREACH()
+	# ENDIF()
 ElSE()
    add_definitions(-Wall -Wextra)
    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
@@ -449,43 +550,49 @@ ElSE()
    else()
        add_definitions(-Wno-maybe-uninitialized)
    endif()
+    if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 9.0 OR CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 9.0))
+        # OpenCascade spews a lot of deprecated-copy warnings
+        add_definitions(-Wno-deprecated-copy)
+    endif()
    # -fPIC is not relevant on Windows and creates pointless warnings
    if (UNIX)
        add_definitions(-fPIC)
    endif()
 ENDIF()

-if (IFCCONVERT_DOUBLE_PRECISION)
-    SET(CONVERT_PRECISION "-DIFCCONVERT_DOUBLE_PRECISION")
-endif()
-
 INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES} ${OCC_INCLUDE_DIR} ${OPENCOLLADA_INCLUDE_DIRS}
-	${Boost_INCLUDE_DIRS} ${LIBXML2_INCLUDE_DIR} ${JSON_INCLUDE_DIR}
+	${Boost_INCLUDE_DIRS} ${LIBXML2_INCLUDE_DIR} ${JSON_INCLUDE_DIR} ${HDF5_INCLUDE_DIR}
 )

 function(files_for_ifc_version IFC_VERSION RESULT_NAME)
    set(IFC_PARSE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../src/ifcparse)
-    set(${RESULT_NAME} 
-        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.h 
+    set(${RESULT_NAME}
+        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.h
        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}enum.h
        ${IFC_PARSE_DIR}/Ifc${IFC_VERSION}.cpp
 		PARENT_SCOPE
    )
 endfunction()

-set(SCHEMA_VERSIONS "2x3" "4" "4x1" "4x2" "4x3_rc1")
+if(NOT SCHEMA_VERSIONS)
+    set(SCHEMA_VERSIONS "2x3" "4" "4x1" "4x2" "4x3_rc1" "4x3_rc2" "4x3_rc3" "4x3_rc4")
+endif()
+
+foreach(s ${SCHEMA_VERSIONS})
+	add_definitions(-DHAS_SCHEMA_${s})
+endforeach()

 if(COMPILE_SCHEMA)
 	# @todo, this appears to be untested at the moment

    find_package(PythonInterp)
-    
+
    IF(NOT PYTHONINTERP_FOUND)
        MESSAGE(FATAL_ERROR "A Python interpreter is necessary when COMPILE_SCHEMA is enabled. Disable COMPILE_SCHEMA or fix Python paths to proceed.")
    ENDIF()
-    
+
    set(IFC_RELEASE_NOT_USED ${SCHEMA_VERSIONS})
-    
+
    # Install pyparsing if necessary
    execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip freeze OUTPUT_VARIABLE PYTHON_PACKAGE_LIST)
    if ("${PYTHON_PACKAGE_LIST}" STREQUAL "")
@@ -507,23 +614,23 @@ if(COMPILE_SCHEMA)
    else()
        message(STATUS "Python interpreter with pyparsing found")
    endif()
-    
+
    # Bootstrap the parser
    message(STATUS "Compiling schema, this will take a while...")
-    execute_process(COMMAND ${PYTHON_EXECUTABLE} bootstrap.py express.bnf 
-        WORKING_DIRECTORY ../src/ifcexpressparser 
+    execute_process(COMMAND ${PYTHON_EXECUTABLE} bootstrap.py express.bnf
+        WORKING_DIRECTORY ../src/ifcexpressparser
        OUTPUT_FILE express_parser.py
        RESULT_VARIABLE SUCCESS)

    if (NOT "${SUCCESS}" STREQUAL "0")
        MESSAGE(FATAL_ERROR "Failed to bootstrap parser. Make sure pyparsing is installed")
    endif()
-        
+
    # Generate code
    execute_process(COMMAND ${PYTHON_EXECUTABLE} ../ifcexpressparser/express_parser.py ../../${COMPILE_SCHEMA}
        WORKING_DIRECTORY ../src/ifcparse
        OUTPUT_VARIABLE COMPILED_SCHEMA_NAME)
-    
+
    # Prevent the schema that had just been compiled from being excluded
 	foreach(s ${SCHEMA_VERSIONS})
 		if("${COMPILED_SCHEMA_NAME}" STREQUAL "${s}")
@@ -552,8 +659,35 @@ if (BUILD_CONVERT)
 endif()

 # IfcParse
-file(GLOB IFCPARSE_H_FILES ../src/ifcparse/*.h)
-file(GLOB IFCPARSE_CPP_FILES ../src/ifcparse/*.cpp)
+file(GLOB IFCPARSE_H_FILES_ALL ../src/ifcparse/*.h)
+file(GLOB IFCPARSE_CPP_FILES_ALL ../src/ifcparse/*.cpp)
+
+foreach(s ${IFCPARSE_H_FILES_ALL})
+get_filename_component(p "${s}" NAME)
+if (NOT "${p}" MATCHES "[0-9]")
+list(APPEND IFCPARSE_H_FILES "${s}")
+endif()
+endforeach()
+
+foreach(s ${IFCPARSE_CPP_FILES_ALL})
+get_filename_component(p "${s}" NAME)
+if (NOT "${p}" MATCHES "[0-9]")
+list(APPEND IFCPARSE_CPP_FILES "${s}")
+endif()
+endforeach()
+
+foreach(s ${SCHEMA_VERSIONS})
+	list(APPEND IFCPARSE_H_FILES
+		../src/ifcparse/Ifc${s}.h
+		../src/ifcparse/Ifc${s}-definitions.h
+	)
+	list(APPEND IFCPARSE_CPP_FILES
+		../src/ifcparse/Ifc${s}.cpp
+		../src/ifcparse/Ifc${s}-schema.cpp
+	)
+endforeach()
+
+
 set(IFCPARSE_FILES ${IFCPARSE_CPP_FILES} ${IFCPARSE_H_FILES})

 add_library(IfcParse ${IFCPARSE_FILES})
@@ -564,7 +698,7 @@ TARGET_LINK_LIBRARIES(IfcParse ${Boost_LIBRARIES} ${BCRYPT_LIBRARIES} ${LIBXML2_
 if (BUILD_IFCGEOM)

 # IfcGeom
-file(GLOB IFCGEOM_H_FILES ../src/ifcgeom/*.h)
+file(GLOB IFCGEOM_H_FILES ../src/ifcgeom/*.h ../src/ifcgeom/*.i)
 file(GLOB IFCGEOM_CPP_FILES ../src/ifcgeom/*.cpp)
 set(IFCGEOM_FILES ${IFCGEOM_CPP_FILES} ${IFCGEOM_H_FILES})

@@ -586,7 +720,7 @@ if (UNIX)
 find_package(Threads)
 endif()

-TARGET_LINK_LIBRARIES(IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
+TARGET_LINK_LIBRARIES(IfcGeom IfcParse ${IFCGEOM_SCHEMA_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})

 endif(BUILD_IFCGEOM)

@@ -603,13 +737,13 @@ set(SERIALIZERS_S_FILES ${SERIALIZERS_S_H_FILES} ${SERIALIZERS_S_CPP_FILES})
 foreach(s ${SCHEMA_VERSIONS})
 	add_library(Serializers_ifc${s} STATIC ${SERIALIZERS_S_FILES})
 	set_target_properties(Serializers_ifc${s} PROPERTIES COMPILE_FLAGS "-DIFC_GEOM_EXPORTS -DIfcSchema=Ifc${s} ${CONVERT_PRECISION}")
-	TARGET_LINK_LIBRARIES(Serializers_ifc${s} IfcGeom ${OPENCASCADE_LIBRARIES})
+	TARGET_LINK_LIBRARIES(Serializers_ifc${s} IfcGeom ${OPENCASCADE_LIBRARIES} ${HDF5_LIBRARIES})
 endforeach()

 add_library(Serializers ${SERIALIZERS_FILES})
 set_target_properties(Serializers PROPERTIES COMPILE_FLAGS "-DIFC_GEOM_EXPORTS ${CONVERT_PRECISION}" VERSION "0.6.0" SOVERSION "0.6")

-TARGET_LINK_LIBRARIES(Serializers ${SERIALIZER_SCHEMA_LIBRARIES})
+TARGET_LINK_LIBRARIES(Serializers ${SERIALIZER_SCHEMA_LIBRARIES} ${OPENCOLLADA_LIBRARIES})

 # IfcConvert
 file(GLOB IFCCONVERT_CPP_FILES ../src/ifcconvert/*.cpp)
@@ -618,13 +752,13 @@ set(IFCCONVERT_FILES ${IFCCONVERT_CPP_FILES} ${IFCCONVERT_H_FILES})
 ADD_EXECUTABLE(IfcConvert ${IFCCONVERT_FILES})
 set_target_properties(IfcConvert PROPERTIES COMPILE_FLAGS "${CONVERT_PRECISION}")

-TARGET_LINK_LIBRARIES(IfcConvert ${IFCOPENSHELL_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${Boost_LIBRARIES} ${OPENCOLLADA_LIBRARIES})
+TARGET_LINK_LIBRARIES(IfcConvert ${IFCOPENSHELL_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${Boost_LIBRARIES} ${HDF5_LIBRARIES})

 if ((NOT WIN32) AND BUILD_SHARED_LIBS)
    # Only set RPATHs when building shared libraries (i.e. IfcParse and
    # IfcGeom are dynamically linked). Not necessarily a perfect solution
    # but probably a good indication of whether RPATHs are necessary.
-    SET_INSTALL_RPATHS(IfcConvert "${IFCOPENSHELL_LIBARY_DIR};${OCC_LIBRARY_DIR};${Boost_LIBRARY_DIRS};${OPENCOLLADA_LIBRARY_DIR}")
+    SET_INSTALL_RPATHS(IfcConvert "${IFCOPENSHELL_LIBRARY_DIR};${OCC_LIBRARY_DIR};${Boost_LIBRARY_DIRS};${OPENCOLLADA_LIBRARY_DIR}")
 endif()

 INSTALL(TARGETS IfcConvert
@@ -645,7 +779,7 @@ ADD_EXECUTABLE(IfcGeomServer ${SOURCE_FILES})
 TARGET_LINK_LIBRARIES(IfcGeomServer ${IFCOPENSHELL_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${Boost_LIBRARIES})

 if ((NOT WIN32) AND BUILD_SHARED_LIBS)
-    SET_INSTALL_RPATHS(IfcGeomServer "${IFCOPENSHELL_LIBARY_DIR};${OCC_LIBRARY_DIR};${Boost_LIBRARY_DIRS}")
+    SET_INSTALL_RPATHS(IfcGeomServer "${IFCOPENSHELL_LIBRARY_DIR};${OCC_LIBRARY_DIR};${Boost_LIBRARY_DIRS}")
 endif()

 INSTALL(TARGETS IfcGeomServer
@@ -656,7 +790,35 @@ INSTALL(TARGETS IfcGeomServer

 endif()

-# Documentation	
+if (ADD_COMMIT_SHA)
+find_package (Git)
+if (GIT_FOUND)
+	message("git found: ${GIT_EXECUTABLE} with version ${GIT_VERSION_STRING}")
+	execute_process(
+		COMMAND ${GIT_EXECUTABLE} branch --contains HEAD
+		OUTPUT_VARIABLE git_branches
+		OUTPUT_STRIP_TRAILING_WHITESPACE
+	)
+	string(REPLACE "\n" ";" git_branch_list "${git_branches}")
+	foreach(git_branch_candidate IN ITEMS ${git_branch_list})
+		string(STRIP "${git_branch_candidate}" git_branch_candidate_2)
+		if (NOT git_branch_candidate_2 MATCHES "^HEAD$")
+			set(git_branch ${git_branch_candidate_2})
+		endif()
+	endforeach()
+	execute_process(
+		COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
+		OUTPUT_VARIABLE git_sha
+		OUTPUT_STRIP_TRAILING_WHITESPACE
+	)
+	message(STATUS "IfcOpenShell branch: \"${git_branch}\"")
+	message(STATUS "IfcOpenShell commit: \"${git_sha}\"")
+	add_definitions(-DIFCOPENSHELL_BRANCH=${git_branch})
+	add_definitions(-DIFCOPENSHELL_COMMIT=${git_sha})
+endif()
+endif()
+
+# Documentation
 IF(BUILD_DOCUMENTATION)
 	set(CMAKE_MODULE_PATH "../docs/cmake")
 	ADD_SUBDIRECTORY(../docs docs)
@@ -674,8 +836,10 @@ IF(BUILD_IFCMAX)
 	ADD_SUBDIRECTORY(../src/ifcmax ifcmax)
 ENDIF()

+ADD_SUBDIRECTORY(../src/svgfill svgfill)
+
 # CMake installation targets
-INSTALL(FILES ${IFCPARSE_H_FILES} 
+INSTALL(FILES ${IFCPARSE_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcparse
 )

@@ -686,11 +850,11 @@ INSTALL(TARGETS IfcParse
 )

 if(BUILD_IFCGEOM)
-INSTALL(FILES ${IFCGEOM_H_FILES} 
+INSTALL(FILES ${IFCGEOM_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcgeom
 )

-INSTALL(FILES  ${SCHEMA_AGNOSTIC_H_FILES} 
+INSTALL(FILES  ${SCHEMA_AGNOSTIC_H_FILES}
 	DESTINATION ${INCLUDEDIR}/ifcgeom_schema_agnostic
 )

@@ -716,3 +880,43 @@ INSTALL(FILES  ${SERIALIZERS_S_FILES}
 	DESTINATION ${INCLUDEDIR}/serializers/schema_dependent
 )
 endif()
+
+
+list(APPEND CPACK_SOURCE_IGNORE_FILES
+  .git
+  .gitignore
+  )
+
+set(CPACK_PACKAGE_NAME "${PROJECT_NAME}-${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}${EXTRA_VERSION}")
+set(CPACK_SOURCE_PACKAGE_FILE_NAME "${PROJECT_NAME}-${PROJECT_VERSION}${EXTRA_VERSION}")
+SET(CPACK_PACKAGE_FILE_NAME "${PROJECT_NAME}-${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}${EXTRA_VERSION}-${CMAKE_SYSTEM_NAME}")
+set(CPACK_PACKAGE_DIRECTORY "${PROJECT_BINARY_DIR}/assets")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "IfcOpenShell")
+set(CPACK_PACKAGE_DESCRIPTION "IfcOpenShell.")
+set(CPACK_PACKAGE_VENDOR "Cemosis")
+set(CPACK_PACKAGE_CONTACT "Christophe Prud'homme <christophe.prudhomme@cemosis.fr>")
+set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
+set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
+set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")
+
+
+set(CPACK_GENERATOR "TGZ;DEB")
+set(CPACK_SOURCE_GENERATOR "TGZ")
+
+FOREACH(COMPONENT IN ITEMS ${BOOST_COMPONENTS})
+    string(REPLACE "_" "-" COMP ${COMPONENT})
+    set(BOOST_DEPS "${BOOST_DEPS}, libboost-${COMP}1.67.0")
+endforeach(COMPONENT)
+
+set(CPACK_DEBIAN_PACKAGE_NAME "${PROJECT_NAME}")
+set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${CPACK_PACKAGE_CONTACT}")
+set(CPACK_DEBIAN_PACKAGE_DEPENDS "python3, libxml2, liboce-foundation11, liboce-modeling11, liboce-ocaf11, liboce-visualization11, liboce-ocaf-lite11, libpython3.8 ${BOOST_DEPS}")
+set(CPACK_DEBIAN_PACKAGE_DESCRIPTION_SUMMARY "${CPACK_PACKAGE_DESCRIPTION_SUMMARY}")
+set(CPACK_DEBIAN_PACKAGE_DESCRIPTION "${CPACK_PACKAGE_DESCRIPTION}")
+set(CPACK_DEBIAN_PACKAGE_PRIORITY "optional")
+set(CPACK_DEBIAN_PACKAGE_SECTION "science")
+set(CPACK_DEBIAN_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}${EXTRA_VERSION}")
+set(CPACK_DEBIAN_ARCHITECTURE "${CMAKE_SYSTEM_PROCESSOR}")
+#set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA "${CMAKE_SOURCE_DIR}/cmake/debian/postinst")
+
+include(CPack)
@@ -32,7 +32,7 @@ DOXYFILE_ENCODING      = UTF-8
 # title of most generated pages and in a few other places.
 # The default value is: My Project.

-PROJECT_NAME           = "My Project"
+PROJECT_NAME           = "IfcOpenShell"

 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version
@@ -829,7 +829,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.

-INPUT                  = ../src/ifcgeom ../src/serializers 
+INPUT                  = ../src/ifcgeom ../src/serializers ../src/ifcgeom_schema_agnostic ../src/ifcparse

 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -22,7 +22,7 @@ exhale_args = {
    # These arguments are required
    "containmentFolder":     "./rst_files",
    "rootFileName":          "library_root.rst",
-    "rootFileTitle":         "IfcOpenShell",
+    "rootFileTitle":         "IfcOpenShell C++",
    "doxygenStripFromPath":  "..",
    # Suggested optional arguments
    "createTreeView":        True,
@@ -34,15 +34,4 @@ exhale_args = {

 }

-
-
-# html_theme = 'sphinx_rtd_theme'
-
-# # Tell sphinx what the primary language being documented is.
-# primary_domain = 'cpp'
-
-# # Tell sphinx what the pygments highlight language should be.
-# highlight_language = 'cpp'
-
-
-
+cpp_id_attributes = ['IFC_PARSE_API', 'IFC_GEOM_API']
@@ -7,4 +7,4 @@ IfcOpenShell
   rst_files/library_root


-`ifcopenshell-python documentation <_build/html/index.html>`_
+* `ifcopenshell-python documentation <python/html/index.html>`_
@@ -1,52 +1,39 @@
 # This program requires doxygen, sphinx, breathe and exhale.

 import os
-import os.path
+import sys
+import shutil
 import subprocess
+import multiprocessing

-from sys import platform
-
-
-def copy_content(content, container):
-	with open(content) as f:
-		with open(container, "w") as f1:
-			for line in f:
-				f1.write(line)
-
-
-conf_path = "./conf.py"
-index_path = "./index.rst"
+# some extra check to see if we can find sphinx in pypy bin dir
+sphinx_build = os.path.join(os.path.dirname(sys.executable), 'sphinx-build')
+if not os.path.exists(sphinx_build):
+	sphinx_build = "sphinx-build"
+# else:
+# 	os.environ['PATH'] = os.pathsep + os.path.dirname(sys.executable)

+# not used, -j caused issues in my sphinx install
+j = str(multiprocessing.cpu_count())

 if not os.path.isdir("./output/doxygen/xml"):
 	os.makedirs("output/doxygen/xml")

-if os.path.isfile(conf_path) and not os.path.isfile(index_path):
-	os.remove(conf_path) 
-if os.path.isfile(index_path) and not os.path.isfile(conf_path):
-	os.remove(index_path) 
+subprocess.check_call([sphinx_build, "-b", "html", ".", "output"])

-if not (os.path.isfile(conf_path) and os.path.isfile(index_path)):
-	subprocess.run(["sphinx-quickstart", "-q", "-p", "IfcOpenShell"])
-
-conf_copy = ["./conf_to_copy.py", "./conf.py"]
-index_copy = ["./index_to_copy.rst", "./index.rst"]
-
-copy_content(conf_copy[0], conf_copy[1])
-copy_content(index_copy[0], index_copy[1])
-
-if platform == "linux" or platform == "linux2":
-	subprocess.run(["make", "html"])
-	if not os.path.isdir("/output/_build"):
-		subprocess.run(["cd","../src/ifcblenderexport/docs"])
-		subprocess.run(["make", "html"])
-		subprocess.run(["cd", "../../../docs"])
-		
-	subprocess.run(["mv" "../src/ifcblenderexport/docs/_build", "./output"])
+if sys.platform == "linux" or sys.platform == "linux2":
+	if os.path.isdir("output/python"):
+		shutil.rmtree("output/python")
 	
+	if not os.path.exists(os.path.join("../src/ifcblenderexport/docs", "contents.rst")):
+		subprocess.check_call(["ln", "index.rst", "contents.rst"], cwd="../src/ifcblenderexport/docs")
+	
+	subprocess.check_call(["sed", "-i", "s/html_theme/# html_theme/g", "conf.py"], cwd="../src/ifcblenderexport/docs")
+	subprocess.check_call(["make", "html"], cwd="../src/ifcblenderexport/docs")
+	subprocess.check_call(["git", "checkout", "conf.py"], cwd="../src/ifcblenderexport/docs")
+	
+	shutil.move("../src/ifcblenderexport/docs/_build", "./output")
+	os.rename("./output/_build", "./output/python")
 		
-elif platform == "win32" or platform == "win64":
-	subprocess.run(["make.bat", "html"])
-
-
-
+elif sys.platform == "win32" or sys.platform == "win64":
+	subprocess.check_call(["make.bat", "html"])
@@ -7,4 +7,4 @@ IfcOpenShell
   rst_files/library_root


-`ifcopenshell-python documentation <_build/html/index.html>`_
+* `ifcopenshell-python documentation <python/html/index.html>`_
@@ -49,27 +49,17 @@
 #          $ brew install git bison autoconf automake freetype libffi cmake   #
 #                                                                             #
 ###############################################################################
-
-from __future__ import print_function
-
 import logging
 import os
 import sys
 import subprocess as sp
 import shutil
-import time
 import tarfile
 import multiprocessing
+import platform
+import sysconfig

-PYTHON_MAJOR = sys.version_info[0]
-
-if PYTHON_MAJOR >= 3:
-    from urllib.request import urlretrieve
-else:
-    # Not Python 3 - today, it is most likely to be Python 2
-    # But note that this might need an update when Python 4
-    # might be around one day
-    from urllib import urlretrieve
+from urllib.request import urlretrieve


 logger = logging.getLogger(__name__)
@@ -78,164 +68,129 @@ ch = logging.StreamHandler()
 ch.setLevel(logging.INFO)
 logger.addHandler(ch)

-PROJECT_NAME="IfcOpenShell"
-PYTHON_VERSIONS=["2.7.16", "3.2.6", "3.3.6", "3.4.6", "3.5.3", "3.6.2", "3.7.3", "3.8.6", "3.9.1"]
-JSON_VERSION="v3.6.1"
-OCE_VERSION="0.18"
-# OCCT_VERSION="7.1.0"
-# OCCT_HASH="89aebde"
-# OCCT_VERSION="7.2.0"
-# OCCT_HASH="88af392"
-OCCT_VERSION="7.3.0p3"
-BOOST_VERSION="1.71.0"
-#PCRE_VERSION="8.39"
-PCRE_VERSION="8.41"
-#LIBXML2_VERSION="2.9.3"
-LIBXML2_VERSION="2.9.9"
-SWIG_VERSION="3.0.12"
-#SWIG_VERSION="4.0.0"
-#OPENCOLLADA_VERSION="v1.6.63"
-OPENCOLLADA_VERSION="v1.6.68"
+PROJECT_NAME = "IfcOpenShell"
+USE_CURRENT_PYTHON_VERSION = os.getenv("USE_CURRENT_PYTHON_VERSION")

+PYTHON_VERSIONS = ["3.6.14", "3.7.12", "3.8.12", "3.9.7", "3.10.0"]
+JSON_VERSION = "v3.6.1"
+OCE_VERSION = "0.18.3"
+OCCT_VERSION = "7.5.3"
+BOOST_VERSION = "1.71.0"
+PCRE_VERSION = "8.41"
+LIBXML2_VERSION = "2.9.11"
+SWIG_VERSION = "4.0.2"
+OPENCOLLADA_VERSION = "v1.6.68"
+HDF5_VERSION = "1.12.1"

+GMP_VERSION = "6.1.2"
+MPFR_VERSION = "3.1.5" # latest is 4.1.0
+CGAL_VERSION = "5.3"

 # binaries
-cp="cp"
-bash="bash"
-uname="uname"
-git="git"
-bunzip2="bunzip2"
-tar="tar"
-cc="cc"
-cplusplus="c++"
-autoconf="autoconf"
-automake="automake"
-yacc="yacc"
-make="make"
+cp = "cp"
+bash = "bash"
+git = "git"
+bunzip2 = "bunzip2"
+tar = "tar"
+cc = "cc"
+cplusplus = "c++"
+autoconf = "autoconf"
+automake = "automake"
+yacc = "yacc"
+make = "make"
 date = "date"
-curl="curl"
-wget="wget"
-strip="strip"
+curl = "curl"
+wget = "wget"
+strip = "strip"

 # Helper function for coloured printing

-NO_COLOR="\033[0m" # <ref>http://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux</ref>
-BLACK_ON_WHITE="\033[0;30;107m"
-RED="\033[31m"
-GREEN="\033[32m"
-YELLOW="\033[33m"
-MAGENTA="\033[35m"
+NO_COLOR = "\033[0m" # <ref>http://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux</ref>
+BLACK_ON_WHITE = "\033[0;30;107m"
+RED = "\033[31m"
+GREEN = "\033[32m"
+YELLOW = "\033[33m"
+MAGENTA = "\033[35m"

 def cecho(message, color=NO_COLOR):
    """Logs message `message` in color `color`."""
-    logger.info("%s%s\033[0m" % (color, message))
+    logger.info(f"{color}{message}\033[0m")

 def which(cmd):
-    for path in os.environ["PATH"].split(":"):
+    for path in os.getenv("PATH").split(":"):
        if os.path.exists(path) and cmd in os.listdir(path):
            return cmd
    return None

-def get_os():
-    ret_value = sp.check_output([uname, "-s"]).strip()
-    return ret_value
-
-def to_pystring(x):
-    """ Python 2 & 3 compatibility function for strings handling 
-    (to solve TypeError "Can't mix strings and bytes in path components" for Python 3).
-    Reference https://github.com/hugsy/gef/issues/382 """
-    res = str(x, encoding="utf-8") if PYTHON_MAJOR == 3 else x
-    substs = [("\n","\\n"), ("\r","\\r"), ("\t","\\t"), ("\v","\\v"), ("\b","\\b"), ]
-    for x,y in substs: res = res.replace(x,y)
-    return res

 # Set defaults for missing empty environment variables

 USE_OCCT = os.environ.get("USE_OCCT", "true").lower() == "true"

 TOOLSET = None
-if get_os() == "Darwin":
+if platform.system() == "Darwin":
    # C++11 features used in OCCT 7+ need a more recent stdlib
    TOOLSET = "10.9" if USE_OCCT else "10.6"

-# python 3.4 doesn't seem to build anymore on recent versions of clang
-if get_os() == "Darwin":
-    try:
-        PYTHON_VERSIONS.remove("3.4.6")
-    except ValueError as e:
-        pass
-   
-try:
-    IFCOS_NUM_BUILD_PROCS = os.environ["IFCOS_NUM_BUILD_PROCS"]
-except KeyError:
-    IFCOS_NUM_BUILD_PROCS=multiprocessing.cpu_count() + 1

-try:
-    TARGET_ARCH = os.environ["TARGET_ARCH"]
-except KeyError:
-    TARGET_ARCH = sp.check_output([uname, "-m"]).strip()
+IFCOS_NUM_BUILD_PROCS = os.getenv("IFCOS_NUM_BUILD_PROCS", multiprocessing.cpu_count() + 1)

-CMAKE_DIR=os.path.realpath(os.path.join("..", "cmake"))
+CMAKE_DIR = os.path.realpath(os.path.join("..", "cmake"))

-try:
-    DEPS_DIR = os.environ["DEPS_DIR"]
-except KeyError:
-    path = [b"..", b"build", sp.check_output(uname).strip(), TARGET_ARCH]
-    if TOOLSET:
-        path.append(TOOLSET)
-        
-    DEPS_DIR = to_pystring(os.path.realpath(os.path.join(*path)))
+path = ["..", "build", platform.system(), platform.machine()]
+if TOOLSET:
+    path.append(TOOLSET)
+DEFAULT_DEPS_DIR = os.path.realpath(os.path.join(*path))
+
+DEPS_DIR = os.getenv("DEPS_DIR", DEFAULT_DEPS_DIR)

 if not os.path.exists(DEPS_DIR):
    os.makedirs(DEPS_DIR)

-try:
-    BUILD_CFG=os.environ["BUILD_CFG"]
-except KeyError:
-    BUILD_CFG="RelWithDebInfo"
+BUILD_CFG = os.getenv("BUILD_CFG", "RelWithDebInfo")


 # Print build configuration information

-cecho ("""This script fetches and builds %s and its dependencies
-""" % (PROJECT_NAME,), BLACK_ON_WHITE)
+cecho (f"""This script fetches and builds {PROJECT_NAME} and its dependencies
+""", BLACK_ON_WHITE)
 cecho("""Script configuration:

 """, GREEN)
-cecho("""* Target Architecture    = %s""" % (TARGET_ARCH,), MAGENTA)
-cecho(" - Whether 32-bit (i686) or 64-bit (x86_64) will be built.")
-cecho("""* USE_OCCT               = %r""" % (USE_OCCT,), MAGENTA)
+cecho(f"""* USE_OCCT               = {USE_OCCT}""", MAGENTA)
 if USE_OCCT:
    cecho(" - Compiling against official Open Cascade")
 else:
    cecho(" - Compiling against Open Cascade Community Edition")
-cecho("* Dependency Directory   = %s" % (DEPS_DIR,), MAGENTA)
-cecho(" - The directory where %s dependencies are installed." % (PROJECT_NAME,))
-cecho("* Build Config Type      = %s" % (BUILD_CFG,), MAGENTA)
+cecho(f"* Dependency Directory   = {DEPS_DIR}", MAGENTA)
+cecho(f" - The directory where {PROJECT_NAME} dependencies are installed.")
+cecho(f"* Build Config Type      = {BUILD_CFG}", MAGENTA)
 cecho(""" - The used build configuration type for the dependencies.
   Defaults to RelWithDebInfo if not specified.""")

 if BUILD_CFG == "MinSizeRel":
    cecho("     WARNING: MinSizeRel build can suffer from a significant performance loss.", RED)

-cecho("* IFCOS_NUM_BUILD_PROCS  = %s" % (IFCOS_NUM_BUILD_PROCS,), MAGENTA)
+cecho(f"* IFCOS_NUM_BUILD_PROCS  = {IFCOS_NUM_BUILD_PROCS}", MAGENTA)
 cecho(""" - How many compiler processes may be run in parallel.
 """)

 dependency_tree = {
-    'IfcParse': ('boost',  'libxml2'),
-    'IfcGeom': ('IfcParse',  'occ'),
-    'IfcConvert': ('IfcGeom',  'OpenCOLLADA', 'json'),
-    'OpenCOLLADA': ('libxml2',  'pcre'),
+    'IfcParse': ('boost', 'libxml2', 'hdf5'),
+    'IfcGeom': ('IfcParse', 'occ', 'json', 'cgal'),
+    'IfcConvert': ('IfcGeom',),
+    'OpenCOLLADA': ('libxml2', 'pcre'),
    'IfcGeomServer': ('IfcGeom',),
-    'IfcOpenShell-Python': ('python',  'swig',  'IfcGeom'),
+    'IfcOpenShell-Python': ('python', 'swig', 'IfcGeom'),
    'swig': ('pcre',),
    'boost': (),
    'libxml2': (),
    'python': (),
    'occ': (),
    'pcre': (),
-    'json': ()
+    'json': (),
+    'hdf5': (),
+    'cgal': ()
 }

 def v(dep):
@@ -266,7 +221,7 @@ print("Building:", *sorted(targets, key=lambda t: len(list(v(t)))))

 for cmd in [git, bunzip2, tar, cc, cplusplus, autoconf, automake, yacc, make, "patch", "cmake"]:
    if which(cmd) is None:
-        raise ValueError("Required tool '%s' not installed or not added to PATH" % (cmd,))
+        raise ValueError(f"Required tool '{cmd}' not installed or not added to PATH")

 # identifiers for the download tool (could be less memory consuming as ints, but are more verbose as strings)
 download_tool_default = download_tool_py = "py"
@@ -277,10 +232,10 @@ download_tool_git = "git"
 log_dir = os.path.join(DEPS_DIR, "logs")
 if not os.path.exists(log_dir):
    os.makedirs(log_dir)
-LOG_FILE="%s.log" % (os.path.join(log_dir, to_pystring(sp.check_output([date, "+%Y%m%d"]).strip())),)
+LOG_FILE = os.path.join(log_dir, sp.check_output([date, "+%Y%m%d"], encoding="utf-8").strip()) + ".log"
 if not os.path.exists(LOG_FILE):
    open(LOG_FILE, "w").close()
-logger.info("using command log file '%s'" % (LOG_FILE,))
+logger.info(f"using command log file '{LOG_FILE}'")

 def run(cmds, cwd=None):

@@ -290,43 +245,47 @@ def run(cmds, cwd=None):
    with leading and trailing whitespace removed.
    """

-    logger.debug("running command %r in directory %r" % (" ".join(cmds), cwd))
-    log_file_handle = open(LOG_FILE, "ab")
-    proc = sp.Popen(cmds, cwd=cwd, stdout=sp.PIPE, stderr=sp.PIPE)
+    logger.debug(f"running command {' '.join(cmds)} in directory {cwd}")
+    log_file_handle = open(LOG_FILE, "a")
+    proc = sp.Popen(cmds, cwd=cwd, stdout=sp.PIPE, stderr=sp.PIPE, encoding="utf-8")
    stdout, stderr = proc.communicate()
    log_file_handle.write(stdout)
    log_file_handle.write(stderr)
    log_file_handle.close()
-    logger.debug("command returned %r" % proc.returncode)
+    logger.debug(f"command returned {proc.returncode}")

    if proc.returncode != 0:
        print("-" * 70)
        print(stderr)
        print("-" * 70)
-        raise Exception("Command `%s` returned exit code %d" % (" ".join(cmds), proc.returncode))
+        raise RuntimeError(f"Command `{' '.join(cmds)}` returned exit code {proc.returncode}")

    return stdout.strip()

-BOOST_VERSION_UNDERSCORE=BOOST_VERSION.replace(".", "_")
+BOOST_VERSION_UNDERSCORE = BOOST_VERSION.replace(".", "_")

-OCE_LOCATION="https://github.com/tpaviot/oce/archive/OCE-%s.tar.gz" % (OCE_VERSION,)
-BOOST_LOCATION="https://dl.bintray.com/boostorg/release/%s/source/" % (BOOST_VERSION,)
+OCE_LOCATION = f"https://github.com/tpaviot/oce/archive/OCE-{OCE_VERSION}.tar.gz"
+BOOST_LOCATION = f"https://boostorg.jfrog.io/artifactory/main/release/{BOOST_VERSION}/source/"

 # Helper functions

+
 def run_autoconf(arg1, configure_args, cwd):
    configure_path = os.path.realpath(os.path.join(cwd, "..", "configure"))
    if not os.path.exists(configure_path):
        run([bash, "./autogen.sh"], cwd=os.path.realpath(os.path.join(cwd, ".."))) # only run autogen.sh in the directory it is located and use cwd to achieve that in order to not mess up things
    # Using `sh` over `bash` fixes issues with building swig 
-    run(["/bin/sh", "../configure"]+configure_args+["--prefix=%s" % (os.path.realpath("%s/install/%s" % (DEPS_DIR, arg1)),)], cwd=cwd)
+    prefix = os.path.realpath(f"{DEPS_DIR}/install/{arg1}")
+    run(["/bin/sh", "../configure"] + configure_args + [f"--prefix={prefix}"], cwd=cwd)
+

 def run_cmake(arg1, cmake_args, cmake_dir=None, cwd=None):
    if cmake_dir is None:
-        P=".."
+        P = ".."
    else:
-        P=cmake_dir
-    run(["cmake", P]+cmake_args+["-DCMAKE_BUILD_TYPE=%s" % (BUILD_CFG,)], cwd=cwd)
+        P = cmake_dir
+    run(["cmake", P] + cmake_args + [f"-DCMAKE_BUILD_TYPE={BUILD_CFG}"], cwd=cwd)
+

 def git_clone_or_pull_repository(clone_url, target_dir, revision=None):
    """Lazily clones the `git` repository denoted by `clone_url` into
@@ -335,10 +294,10 @@ def git_clone_or_pull_repository(clone_url, target_dir, revision=None):
    `revision` after cloning or in the existing clone if `revision` is not
    `None`."""
    if not os.path.exists(target_dir):
-        logger.info("cloning '%s' into '%s'" % (clone_url, target_dir))
-        run([git, "clone", clone_url, target_dir])
+        logger.info(f"cloning '{clone_url}' into '{target_dir}'")
+        run([git, "clone", "--recursive", clone_url, target_dir])
    else:
-        logger.info("directory '%s' already cloned. Pulling latest changes." % (target_dir,))
+        logger.info(f"directory '{target_dir}' already cloned. Pulling latest changes.")

    # detect whether we are on a branch and pull
    if run([git, "rev-parse", "--abbrev-ref", "HEAD"], cwd=target_dir) != "HEAD":
@@ -348,20 +307,20 @@ def git_clone_or_pull_repository(clone_url, target_dir, revision=None):
        run([git, "checkout", revision], cwd=target_dir)


-def build_dependency(name, mode, build_tool_args, download_url, download_name, download_tool=download_tool_default, revision=None, patch=None, additional_files={}, no_append_name=False):
+def build_dependency(name, mode, build_tool_args, download_url, download_name, download_tool=download_tool_default, revision=None, patch=None, additional_files={}, no_append_name=False, **kwargs):
    """Handles building of dependencies with different tools (which are
    distinguished with the `mode` argument. `build_tool_args` is expected to be
    a list which is necessary in order to not mess up quoting of compiler and
    linker flags."""
    check_dir = os.path.join(DEPS_DIR, "install", name)
    if os.path.exists(check_dir):
-        logger.info( "Found existing %s, skipping" % (name,))
+        logger.info(f"Found existing {name}, skipping")
        return
    build_dir = os.path.join(DEPS_DIR, "build")
    if not os.path.exists(build_dir):
        os.makedirs(build_dir)
        
-    logger.info("\rFetching %s...   " % (name,))
+    logger.info(f"\rFetching {name}...   ")
    
    if download_tool == download_tool_py:
        if no_append_name:
@@ -373,16 +332,16 @@ def build_dependency(name, mode, build_tool_args, download_url, download_name, d
        if not os.path.exists(download_path):
            urlretrieve(url, os.path.join(build_dir, download_path))
        else:
-            logger.info("Download '%s' already exists, assuming it's an undamaged download and that it has been extracted if possible, skipping" % (download_path,))
+            logger.info(f"Download '{download_path}' already exists, assuming it's an undamaged download and that it has been extracted if possible, skipping")
    elif download_tool == download_tool_git:
-        logger.info("\rChecking %s...   " % (name,))
+        logger.info(f"\rChecking {name}...   ")
        git_clone_or_pull_repository(download_url, target_dir=os.path.join(build_dir, download_name), revision=revision)
    else:
-        raise ValueError("download tool '%s' is not supported" % (download_tool,))
+        raise ValueError(f"download tool '{download_tool}' is not supported")
    download_dir = os.path.join(build_dir, download_name)
    
    if os.path.isdir(download_dir):
-        extract_dir_name=download_name
+        extract_dir_name = download_name
        extract_dir = os.path.join(build_dir, extract_dir_name)
    else:
        download_tarfile_path = os.path.join(build_dir, download_name)
@@ -392,11 +351,12 @@ def build_dependency(name, mode, build_tool_args, download_url, download_name, d
            compr = "bz2"
        else:
            raise RuntimeError("fix source for new download type")
-        download_tarfile = tarfile.open(name=download_tarfile_path, mode="r:%s" % (compr,))
-        extract_dir_name= os.path.commonprefix(download_tarfile.getnames()) # tarfile seriously doesn't have a function to retrieve the root directory more easily
+        download_tarfile = tarfile.open(name=download_tarfile_path, mode=f"r:{compr}")
+        # tarfile seriously doesn't have a function to retrieve the root directory more easily
+        extract_dir_name = os.path.commonprefix([x for x in download_tarfile.getnames() if x != "."])
        #run([tar, "--exclude=\"*/*\"", "-tf", download_name], cwd=build_dir).strip() no longer works
        if extract_dir_name is None:
-            extract_dir_name= run([bash, "-c", "tar -tf %s 2> /dev/null | head -n 1 | cut -f1 -d /" % (download_name,)], cwd=build_dir)
+            extract_dir_name = run([bash, "-c", f"tar -tf {download_name} 2> /dev/null | head -n 1 | cut -f1 -d /"], cwd=build_dir)
        extract_dir = os.path.join(build_dir, extract_dir_name)
        if not os.path.exists(extract_dir):
            run([tar, "-xf", download_name], cwd=build_dir)
@@ -412,78 +372,80 @@ def build_dependency(name, mode, build_tool_args, download_url, download_name, d
            except Exception as e:
                # Assert that the patch has already been applied
                run(["patch", "-p1", "--batch", "--reverse", "--dry-run", "-i", patch_abs], cwd=extract_dir)
-            
-    if mode != "bjam":
+    
+    if mode == "ctest":
+        run(["ctest", "-S", "HDF5config.cmake,BUILD_GENERATOR=Unix", "-C", BUILD_CFG, "-V", "-O", "hdf5.log"], cwd=extract_dir)
+        run([tar, "-xf", kwargs["ctest_result"] + ".tar.gz"], cwd=os.path.join(extract_dir, 'build'))
+        shutil.copytree(
+            os.path.join(extract_dir, "build", kwargs["ctest_result"], kwargs["ctest_result_path"]),
+            os.path.join(DEPS_DIR, "install", name)
+        )
+    elif mode != "bjam":
        extract_build_dir = os.path.join(extract_dir, "build")
        if os.path.exists(extract_build_dir):
            shutil.rmtree(extract_build_dir)
        os.makedirs(extract_build_dir)

-        logger.info("\rConfiguring %s..." % (name,))
+        logger.info(f"\rConfiguring {name}...")
        if mode == "autoconf":
            run_autoconf(name, build_tool_args, cwd=extract_build_dir)
        elif mode == "cmake":
            run_cmake(name, build_tool_args, cwd=extract_build_dir)
        else:
            raise ValueError()
-        logger.info("\rBuilding %s...   " % (name,))
-        run([make, "-j%s" % (IFCOS_NUM_BUILD_PROCS,), "VERBOSE=1"], cwd=extract_build_dir)
-        logger.info( "\rInstalling %s... " % (name,))
+        logger.info(f"\rBuilding {name}...   ")
+        run([make, f"-j{IFCOS_NUM_BUILD_PROCS}", "VERBOSE=1"], cwd=extract_build_dir)
+        logger.info(f"\rInstalling {name}... ")
        run([make, "install"], cwd=extract_build_dir)
-        logger.info( "\rInstalled %s     \n" % (name,))
+        logger.info(f"\rInstalled {name}     \n")
    else:
-        logger.info( "\rConfiguring %s..." % (name,))
+        logger.info(f"\rConfiguring {name}...")
        run([bash, "./bootstrap.sh"], cwd=extract_dir)
-        logger.info("\rBuilding %s...   " % (name,))
-        run(["./b2", "-j%s" % (IFCOS_NUM_BUILD_PROCS,)]+build_tool_args, cwd=extract_dir)
-        logger.info("\rInstalling %s... " % (name,))
-        shutil.copytree(os.path.join(extract_dir, "boost"), os.path.join(DEPS_DIR, "install", "boost-%s" % BOOST_VERSION, "boost"))
-        logger.info("\rInstalled %s     \n" % (name,))
+        logger.info(f"\rBuilding {name}...   ")
+        run(["./b2", f"-j{IFCOS_NUM_BUILD_PROCS}"] + build_tool_args, cwd=extract_dir)
+        logger.info(f"\rInstalling {name}... ")
+        shutil.copytree(os.path.join(extract_dir, "boost"), os.path.join(DEPS_DIR, "install", f"boost-{BOOST_VERSION}", "boost"))
+        logger.info(f"\rInstalled {name}     \n")

 cecho("Collecting dependencies:", GREEN)

 # Set compiler flags for 32bit builds on 64bit system
 # TODO: This is untested

-ADDITIONAL_ARGS=[]
-BOOST_ADDRESS_MODEL=[]
-if TARGET_ARCH == "i686" and run([uname, "-m"]).strip() == "x86_64":
-    if get_os() == "Darwin":
-        ADDITIONAL_ARGS=["-m32", "-arch i386"]
-    else:
-        ADDITIONAL_ARGS=["-m32"]
-    BOOST_ADDRESS_MODEL=["architecture=x86", "address-model=32"]
+ADDITIONAL_ARGS = []
+BOOST_ADDRESS_MODEL = []

-if get_os() == "Darwin":
-    ADDITIONAL_ARGS=["-mmacosx-version-min=%s" % TOOLSET]+ADDITIONAL_ARGS
+if platform.system() == "Darwin":
+    ADDITIONAL_ARGS = [f"-mmacosx-version-min={TOOLSET}"] + ADDITIONAL_ARGS

 # If the linker supports GC sections, set it up to reduce binary file size
 # -fPIC is required for the shared libraries to work

-CXXFLAGS=os.environ.get("CXXFLAGS", "")
-CFLAGS=os.environ.get("CFLAGS", "")
-LDFLAGS=os.environ.get("LDFLAGS", "")
+CXXFLAGS = os.environ.get("CXXFLAGS", "")
+CFLAGS = os.environ.get("CFLAGS", "")
+LDFLAGS = os.environ.get("LDFLAGS", "")

+ADDITIONAL_ARGS_STR = " ".join(ADDITIONAL_ARGS)
 if sp.call([bash, "-c", "ld --gc-sections 2>&1 | grep -- --gc-sections &> /dev/null"]) != 0:
-    CXXFLAGS_MINIMAL="%s %s %s" % (CXXFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
-    CFLAGS_MINIMAL="%s %s %s" % (CFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
+    CXXFLAGS_MINIMAL = f"{CXXFLAGS} {PIC} {ADDITIONAL_ARGS_STR}"
+    CFLAGS_MINIMAL = f"{CFLAGS} {PIC} {ADDITIONAL_ARGS_STR}"
    if BUILD_STATIC:
-        CXXFLAGS="%s %s -fdata-sections -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden %s" % (CXXFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
-        CFLAGS="%s   %s -fdata-sections -ffunction-sections -fvisibility=hidden %s"% (CFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
+        CXXFLAGS = f"{CXXFLAGS} {PIC} -fdata-sections -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden {ADDITIONAL_ARGS_STR}"
+        CFLAGS = f"{CFLAGS}   {PIC} -fdata-sections -ffunction-sections -fvisibility=hidden {ADDITIONAL_ARGS_STR}"
    else:
-        CXXFLAGS=CXXFLAGS_MINIMAL
-        CFLAGS=CFLAGS_MINIMAL
-    LDFLAGS="%s  -Wl,--gc-sections %s" % (LDFLAGS, str.join(" ", ADDITIONAL_ARGS))
+        CXXFLAGS = CXXFLAGS_MINIMAL
+        CFLAGS = CFLAGS_MINIMAL
+    LDFLAGS = f"{LDFLAGS}  -Wl,--gc-sections {ADDITIONAL_ARGS_STR}"
 else:
-    CXXFLAGS_MINIMAL="%s %s %s" % (CXXFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
-    CFLAGS_MINIMAL="%s   %s %s" % (CFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
+    CXXFLAGS_MINIMAL = f"{CXXFLAGS} {PIC} {ADDITIONAL_ARGS_STR}"
+    CFLAGS_MINIMAL = f"{CFLAGS}   {PIC} {ADDITIONAL_ARGS_STR}"
    if BUILD_STATIC:
-        CXXFLAGS="%s %s -fvisibility=hidden -fvisibility-inlines-hidden %s" % (CXXFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
-        CFLAGS="%s   %s -fvisibility=hidden -fvisibility-inlines-hidden %s" % (CFLAGS, PIC, str.join(" ", ADDITIONAL_ARGS))
+        CXXFLAGS = f"{CXXFLAGS} {PIC} -fvisibility=hidden -fvisibility-inlines-hidden {ADDITIONAL_ARGS_STR}"
+        CFLAGS = f"{CFLAGS}   {PIC} -fvisibility=hidden -fvisibility-inlines-hidden {ADDITIONAL_ARGS_STR}"
    else:
        CXXFLAGS=CXXFLAGS_MINIMAL
        CFLAGS=CFLAGS_MINIMAL
-    LDFLAGS="%s %s" % (LDFLAGS, str.join(" ", ADDITIONAL_ARGS))
+    LDFLAGS = f"{LDFLAGS} {ADDITIONAL_ARGS_STR}"
    
 os.environ["CXXFLAGS"] = CXXFLAGS
 os.environ["CFLAGS"] = CFLAGS
@@ -493,9 +455,21 @@ os.environ["LDFLAGS"] = LDFLAGS
 # @tfk: this is no longer needed
 # build_dependency(name="cmake-%s" % (CMAKE_VERSION,), mode="autoconf", build_tool_args=[], download_url="https://cmake.org/files/v%s" % (CMAKE_VERSION_2,), download_name="cmake-%s.tar.gz" % (CMAKE_VERSION,))

+if 'hdf5' in targets:
+    HDF5_MAJOR = ".".join(HDF5_VERSION.split(".")[:-1])
+    build_dependency(
+        name=f"hdf5-{HDF5_VERSION}",
+        mode="ctest",
+        build_tool_args=[],
+        download_url=f"https://support.hdfgroup.org/ftp/HDF5/releases/hdf5-{HDF5_MAJOR}/hdf5-{HDF5_VERSION}/src/",
+        download_name=f"CMake-hdf5-{HDF5_VERSION}.tar.gz",
+        ctest_result=f"HDF5-{HDF5_VERSION}-{platform.system()}",
+        ctest_result_path=f"HDF_Group/HDF5/{HDF5_VERSION}"
+    )
+
 if "json" in targets:
-    json_url = "https://github.com/nlohmann/json/releases/download/{JSON_VERSION}/json.hpp".format(**locals())
-    json_install_path = "{DEPS_DIR}/install/json/nlohmann/json.hpp".format(**locals())
+    json_url = f"https://github.com/nlohmann/json/releases/download/{JSON_VERSION}/json.hpp"
+    json_install_path = f"{DEPS_DIR}/install/json/nlohmann/json.hpp"
    if not os.path.exists(os.path.dirname(json_install_path)):
        os.makedirs(os.path.dirname(json_install_path))
    if not os.path.exists(json_install_path):
@@ -503,11 +477,11 @@ if "json" in targets:

 if "pcre" in targets:
    build_dependency(
-        name="pcre-{PCRE_VERSION}".format(**locals()),
+        name=f"pcre-{PCRE_VERSION}",
        mode="autoconf",
        build_tool_args=[DISABLE_FLAG],
-        download_url="https://downloads.sourceforge.net/project/pcre/pcre/{PCRE_VERSION}/".format(**locals()),
-        download_name="pcre-{PCRE_VERSION}.tar.bz2".format(**locals())
+        download_url=f"https://downloads.sourceforge.net/project/pcre/pcre/{PCRE_VERSION}/",
+        download_name=f"pcre-{PCRE_VERSION}.tar.bz2"
    )

 # An issue exists with swig-1.3 and python >= 3.2
@@ -516,20 +490,20 @@ if "swig" in targets:
    build_dependency(
        name="swig",
        mode="autoconf",
-        build_tool_args=["--disable-ccache", "--with-pcre-prefix={DEPS_DIR}/install/pcre-{PCRE_VERSION}".format(**locals())],
+        build_tool_args=["--disable-ccache", f"--with-pcre-prefix={DEPS_DIR}/install/pcre-{PCRE_VERSION}"],
        download_url="https://github.com/swig/swig.git",
        download_name="swig",
        download_tool=download_tool_git,
-        revision="rel-{SWIG_VERSION}".format(**locals())
+        revision=f"rel-{SWIG_VERSION}"
    )

 if USE_OCCT and "occ" in targets:
    build_dependency(
-        name="occt-{OCCT_VERSION}".format(**locals()),
+        name=f"occt-{OCCT_VERSION}",
        mode="cmake",
        build_tool_args=[
-            "-DINSTALL_DIR={DEPS_DIR}/install/occt-{OCCT_VERSION}".format(**locals()),
-            "-DBUILD_LIBRARY_TYPE={LINK_TYPE_UCFIRST}".format(**locals()),
+            f"-DINSTALL_DIR={DEPS_DIR}/install/occt-{OCCT_VERSION}",
+            f"-DBUILD_LIBRARY_TYPE={LINK_TYPE_UCFIRST}",
            "-DBUILD_MODULE_Draw=0",
            "-DBUILD_RELEASE_DISABLE_EXCEPTIONS=Off"
        ],
@@ -541,7 +515,7 @@ if USE_OCCT and "occ" in targets:
    )
 elif "occ" in targets:
    build_dependency(
-        name="oce-{OCE_VERSION}".format(**locals()),
+        name=f"oce-{OCE_VERSION}",
        mode="cmake",
        build_tool_args=[
            "-DOCE_DISABLE_TKSERVICE_FONT=ON",
@@ -550,15 +524,15 @@ elif "occ" in targets:
            "-DOCE_DISABLE_X11=ON",
            "-DOCE_VISUALISATION=OFF",
            "-DOCE_OCAF=OFF",
-            "-DOCE_INSTALL_PREFIX={DEPS_DIR}/install/oce-{OCE_VERSION}".format(**locals())
+            f"-DOCE_INSTALL_PREFIX={DEPS_DIR}/install/oce-{OCE_VERSION}"
        ],
        download_url="https://github.com/tpaviot/oce/archive/",
-        download_name="OCE-{OCE_VERSION}.tar.gz".format(**locals())
+        download_name=f"OCE-{OCE_VERSION}.tar.gz"
    )
        
 if "libxml2" in targets:
    build_dependency(
-        "libxml2-{LIBXML2_VERSION}".format(**locals()),
+        f"libxml2-{LIBXML2_VERSION}",
        "autoconf",
        build_tool_args=[
            "--without-python",
@@ -569,7 +543,7 @@ if "libxml2" in targets:
            "--without-lzma"
        ],
        download_url="ftp://xmlsoft.org/libxml2/",
-        download_name="libxml2-{LIBXML2_VERSION}.tar.gz".format(**locals())
+        download_name=f"libxml2-{LIBXML2_VERSION}.tar.gz"
    )
    
 if "OpenCOLLADA" in targets:
@@ -577,12 +551,12 @@ if "OpenCOLLADA" in targets:
        "OpenCOLLADA",
        "cmake",
        build_tool_args=[
-            "-DLIBXML2_INCLUDE_DIR={DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/include/libxml2".format(**locals()),
-            "-DLIBXML2_LIBRARIES={DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/lib/libxml2.{LIBRARY_EXT}".format(**locals()),
-            "-DPCRE_INCLUDE_DIR={DEPS_DIR}/install/pcre-{PCRE_VERSION}/include".format(**locals()),
-            "-DPCRE_PCREPOSIX_LIBRARY={DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib/libpcreposix.{LIBRARY_EXT}".format(**locals()),
-            "-DPCRE_PCRE_LIBRARY={DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib/libpcre.{LIBRARY_EXT}".format(**locals()),
-            "-DCMAKE_INSTALL_PREFIX={DEPS_DIR}/install/OpenCOLLADA/".format(**locals())
+            f"-DLIBXML2_INCLUDE_DIR={DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/include/libxml2",
+            f"-DLIBXML2_LIBRARIES={DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/lib/libxml2.{LIBRARY_EXT}",
+            f"-DPCRE_INCLUDE_DIR={DEPS_DIR}/install/pcre-{PCRE_VERSION}/include",
+            f"-DPCRE_PCREPOSIX_LIBRARY={DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib/libpcreposix.{LIBRARY_EXT}",
+            f"-DPCRE_PCRE_LIBRARY={DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib/libpcre.{LIBRARY_EXT}",
+            f"-DCMAKE_INSTALL_PREFIX={DEPS_DIR}/install/OpenCOLLADA/"
        ],
        download_url="https://github.com/KhronosGroup/OpenCOLLADA.git",
        download_name="OpenCOLLADA",
@@ -591,110 +565,154 @@ if "OpenCOLLADA" in targets:
        revision=OPENCOLLADA_VERSION
    )

-if "python" in targets:
+if "python" in targets and not USE_CURRENT_PYTHON_VERSION:
    # Python should not be built with -fvisibility=hidden, from experience that introduces segfaults
-    OLD_CXX_FLAGS=os.environ["CXXFLAGS"]
-    OLD_C_FLAGS=os.environ["CFLAGS"]
-    os.environ["CXXFLAGS"]=CXXFLAGS_MINIMAL
-    os.environ["CFLAGS"]=CFLAGS_MINIMAL
+    OLD_CXX_FLAGS = os.environ["CXXFLAGS"]
+    OLD_C_FLAGS = os.environ["CFLAGS"]
+    os.environ["CXXFLAGS"] = CXXFLAGS_MINIMAL
+    os.environ["CFLAGS"] = CFLAGS_MINIMAL

    # On OSX a dynamic python library is built or it would not be compatible
    # with the system python because of some threading initialization
-    PYTHON_CONFIGURE_ARGS=[]
-    if get_os() == "Darwin":
-        PYTHON_CONFIGURE_ARGS=["--disable-static", "--enable-shared"]
+    PYTHON_CONFIGURE_ARGS = []
+    if platform.system() == "Darwin":
+        PYTHON_CONFIGURE_ARGS = ["--disable-static", "--enable-shared"]

-    def get_python_unicode_confs(py_ver):
-        if py_ver < "3.3":
-            return [("--enable-unicode=ucs2",""), ("--enable-unicode=ucs4","u")]
-        else: return [("","")]
-
-    def PYTHON_VERSION_CONFS():
-        for v in PYTHON_VERSIONS:
-            for unicode_conf, abi_tag in get_python_unicode_confs(v):
-                yield v, unicode_conf, abi_tag
-
-    for PYTHON_VERSION, unicode_conf, abi_tag in PYTHON_VERSION_CONFS():
+    for PYTHON_VERSION in PYTHON_VERSIONS:
        try:
            build_dependency(
-                "python-{PYTHON_VERSION}{abi_tag}".format(**locals()),
+                f"python-{PYTHON_VERSION}",
                "autoconf",
-                PYTHON_CONFIGURE_ARGS + [unicode_conf],
-                "http://www.python.org/ftp/python/{PYTHON_VERSION}/".format(**locals()),
-                "Python-{PYTHON_VERSION}.tgz".format(**locals())
+                PYTHON_CONFIGURE_ARGS,
+                f"http://www.python.org/ftp/python/{PYTHON_VERSION}/",
+                f"Python-{PYTHON_VERSION}.tgz"
            )
-        except Exception as e:
-            pyver2 = PYTHON_VERSION[:PYTHON_VERSION.rfind('.')]
-            if os.path.exists("{DEPS_DIR}/install/python-{PYTHON_VERSION}{abi_tag}/bin/python{pyver2}".format(**locals())):
-                print("Installation partially failed")
-            else: raise e
+        except RuntimeError as e:
+            # Sometimes setting up modules such as pip/lzma can cause
+            # the python installer script to return a non zero exit
+            # code where actually the headers and dynamic libraries
+            # are installed correctly. This is all we need so we catch
+            # the exception and only reraise if a partially successful
+            # install is not detected.
+            if not os.path.exists(
+                os.path.join(DEPS_DIR, "install", f"python-{PYTHON_VERSION}")
+            ):
+                raise e

-    os.environ["CXXFLAGS"]=OLD_CXX_FLAGS
-    os.environ["CFLAGS"]=OLD_C_FLAGS
+    os.environ["CXXFLAGS"] = OLD_CXX_FLAGS
+    os.environ["CFLAGS"] = OLD_C_FLAGS

 if "boost" in targets:
    str_concat = lambda prefix: lambda postfix: "" if postfix.strip() == "" else "=".join((prefix, postfix.strip()))
    build_dependency(
-        "boost-{BOOST_VERSION}".format(**locals()),
+        f"boost-{BOOST_VERSION}",
        mode="bjam",
        build_tool_args=[
-            "--stagedir={DEPS_DIR}/install/boost-{BOOST_VERSION}".format(**locals()),
+            f"--stagedir={DEPS_DIR}/install/boost-{BOOST_VERSION}",
            "--with-system",
            "--with-program_options",
            "--with-regex",
            "--with-thread",
            "--with-date_time",
            "--with-iostreams",
-            "link={LINK_TYPE}".format(**locals())
+            f"link={LINK_TYPE}"
                                                                         ] + \
            BOOST_ADDRESS_MODEL                                            + \
            list(map(str_concat("cxxflags"), CXXFLAGS.strip().split(' '))) + \
            list(map(str_concat("linkflags"), LDFLAGS.strip().split(' '))) + \
            ["stage", "-s", "NO_BZIP2=1"],
        download_url=BOOST_LOCATION,
-        download_name="boost_{BOOST_VERSION_UNDERSCORE}.tar.bz2".format(**locals())
+        download_name=f"boost_{BOOST_VERSION_UNDERSCORE}.tar.bz2"
+    )
+    
+if "cgal" in targets:
+    build_dependency(
+        name=f"gmp-{GMP_VERSION}",
+        mode="autoconf",
+        build_tool_args=["--disable-shared", "--with-pic"],
+        download_url="https://ftp.gnu.org/gnu/gmp/",
+        download_name=f"gmp-{GMP_VERSION}.tar.bz2"
+    )
+    
+    build_dependency(
+        name=f"mpfr-{MPFR_VERSION}",
+        mode="autoconf",
+        build_tool_args=["--disable-shared", f"--with-gmp={DEPS_DIR}/install/gmp-{GMP_VERSION}"],
+        download_url=f"http://www.mpfr.org/mpfr-{MPFR_VERSION}/",
+        download_name=f"mpfr-{MPFR_VERSION}.tar.bz2"
+    )
+    
+    build_dependency(
+        name=f"cgal-{CGAL_VERSION}",
+        mode="cmake",
+        build_tool_args=[
+            f"-DGMP_LIBRARIES={DEPS_DIR}/install/gmp-{GMP_VERSION}/lib/libgmp.a",
+            f"-DGMP_INCLUDE_DIR={DEPS_DIR}/install/gmp-{GMP_VERSION}/include",
+            f"-DMPFR_LIBRARIES={DEPS_DIR}/install/mpfr-{MPFR_VERSION}/lib/libmpfr.a" ,
+            f"-DMPFR_INCLUDE_DIR={DEPS_DIR}/install/mpfr-{MPFR_VERSION}/include",
+            f"-DBoost_INCLUDE_DIR={DEPS_DIR}/install/boost-{BOOST_VERSION}",
+            f"-DCMAKE_INSTALL_PREFIX={DEPS_DIR}/install/cgal-{CGAL_VERSION}/",
+            "-DCGAL_HEADER_ONLY=On",            
+            "-DBUILD_SHARED_LIBS=Off"
+        ],
+        download_url="https://github.com/CGAL/cgal.git",
+        download_name="cgal",
+        download_tool=download_tool_git,
+        revision=f"v{CGAL_VERSION}"
    )
    
 cecho("Building IfcOpenShell:", GREEN)

-IFCOS_DIR=os.path.join(DEPS_DIR, "build", "ifcopenshell")
-if os.path.exists(IFCOS_DIR):
-    shutil.rmtree(IFCOS_DIR)
-os.makedirs(IFCOS_DIR)
-
+IFCOS_DIR = os.path.join(DEPS_DIR, "build", "ifcopenshell")
+if os.environ.get("NO_CLEAN", "").lower() not in {"1", "on", "true"}:
+    if os.path.exists(IFCOS_DIR):
+        shutil.rmtree(IFCOS_DIR)
+os.makedirs(IFCOS_DIR, exist_ok=True)
 executables_dir = os.path.join(IFCOS_DIR, "executables")
-if not os.path.exists(executables_dir):
-    os.makedirs(executables_dir)
+os.makedirs(executables_dir, exist_ok=True)

 logger.info("\rConfiguring executables...")

 OFF_ON = ["OFF", "ON"]

-cmake_args=[
-    "-DUSE_MMAP="                      "OFF",
-    "-DBUILD_EXAMPLES="                "OFF",
+exec_args = [
+    "-DBUILD_IFCGEOM="                 +OFF_ON["IfcGeom" in targets],
+    "-DBUILD_GEOMSERVER="              +OFF_ON["IfcGeomServer" in targets],
+    "-DBUILD_CONVERT="                 +OFF_ON["IfcConvert" in targets],
    "-DBUILD_IFCPYTHON="               "OFF",
-    "-DBUILD_SHARED_LIBS="            +OFF_ON[not BUILD_STATIC],
-    "-DBUILD_IFCGEOM="                +OFF_ON["IfcGeom" in targets],
-    "-DBUILD_GEOMSERVER="             +OFF_ON["IfcGeomServer" in targets],
-    "-DBUILD_CONVERT="                +OFF_ON["IfcConvert" in targets],
-    "-DCMAKE_INSTALL_PREFIX="          "{DEPS_DIR}/install/ifcopenshell".format(**locals()),
-    "-DBOOST_ROOT="                    "{DEPS_DIR}/install/boost-{BOOST_VERSION}".format(**locals()),
-    "-DGLTF_SUPPORT="                  "ON",
-    "-DJSON_INCLUDE_DIR="              "{DEPS_DIR}/install/json".format(**locals()),
-    "-DBoost_NO_BOOST_CMAKE="          "On"
+    "-DCMAKE_INSTALL_PREFIX="          f"{DEPS_DIR}/install/ifcopenshell",
 ]

+cmake_args = [
+    "-DUSE_MMAP="                      "OFF",
+    "-DBUILD_EXAMPLES="                "OFF",
+    "-DBUILD_SHARED_LIBS="             +OFF_ON[not BUILD_STATIC],
+    "-DBOOST_ROOT="                    f"{DEPS_DIR}/install/boost-{BOOST_VERSION}",
+    "-DGLTF_SUPPORT="                  "ON",
+    "-DJSON_INCLUDE_DIR="              f"{DEPS_DIR}/install/json",
+    "-DBoost_NO_BOOST_CMAKE="          "On",
+]
+
+if "cgal" in targets:
+    cmake_args.extend([
+        "-DCGAL_INCLUDE_DIR="          f"{DEPS_DIR}/install/cgal-{CGAL_VERSION}/include",
+        "-DGMP_INCLUDE_DIR="           f"{DEPS_DIR}/install/gmp-{GMP_VERSION}/include",
+        "-DGMP_LIBRARY_DIR="           f"{DEPS_DIR}/install/gmp-{GMP_VERSION}/lib",
+        "-DMPFR_INCLUDE_DIR="          f"{DEPS_DIR}/install/mpfr-{MPFR_VERSION}/include",
+        "-DMPFR_LIBRARY_DIR="          f"{DEPS_DIR}/install/mpfr-{MPFR_VERSION}/lib",
+    ])
+
 if "occ" in targets and USE_OCCT:
-    occ_include_dir =                  "{DEPS_DIR}/install/occt-{OCCT_VERSION}/include/opencascade".format(**locals())
-    occ_library_dir =                  "{DEPS_DIR}/install/occt-{OCCT_VERSION}/lib".format(**locals())
+    occ_include_dir =                  f"{DEPS_DIR}/install/occt-{OCCT_VERSION}/include/opencascade"
+    occ_library_dir =                  f"{DEPS_DIR}/install/occt-{OCCT_VERSION}/lib"
    cmake_args.extend([
        "-DOCC_INCLUDE_DIR="           +occ_include_dir,
        "-DOCC_LIBRARY_DIR="           +occ_library_dir
    ])
+
 elif "occ" in targets:
-    occ_include_dir =                  "{DEPS_DIR}/install/oce-{OCE_VERSION}/include/oce".format(**locals())
-    occ_library_dir =                  "{DEPS_DIR}/install/oce-{OCE_VERSION}/lib"
+    occ_include_dir =                  f"{DEPS_DIR}/install/oce-{OCE_VERSION}/include/oce"
+    occ_library_dir =                  f"{DEPS_DIR}/install/oce-{OCE_VERSION}/lib"
    cmake_args.extend([
        "-DOCC_INCLUDE_DIR="           +occ_include_dir,
        "-DOCC_LIBRARY_DIR="           +occ_library_dir
@@ -702,83 +720,98 @@ elif "occ" in targets:

 if "OpenCOLLADA" in targets:
    cmake_args.extend([
-        "-DOPENCOLLADA_INCLUDE_DIR="   "{DEPS_DIR}/install/OpenCOLLADA/include/opencollada".format(**locals()),
-        "-DOPENCOLLADA_LIBRARY_DIR="   "{DEPS_DIR}/install/OpenCOLLADA/lib/opencollada".format(**locals())
+        "-DOPENCOLLADA_INCLUDE_DIR="   f"{DEPS_DIR}/install/OpenCOLLADA/include/opencollada",
+        "-DOPENCOLLADA_LIBRARY_DIR="   f"{DEPS_DIR}/install/OpenCOLLADA/lib/opencollada"
+    ])
+else:
+    cmake_args.extend([
+        "-DCOLLADA_SUPPORT="           "Off",
    ])

 if "pcre" in targets:
    cmake_args.append(
-        "-DPCRE_LIBRARY_DIR="          "{DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib".format(**locals())
+        "-DPCRE_LIBRARY_DIR="          f"{DEPS_DIR}/install/pcre-{PCRE_VERSION}/lib"
    )

 if "libxml2" in targets:
    cmake_args.extend([
-        "-DLIBXML2_INCLUDE_DIR="       "{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/include/libxml2".format(**locals()),
-        "-DLIBXML2_LIBRARIES="         "{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/lib/libxml2.{LIBRARY_EXT}".format(**locals())
+        "-DLIBXML2_INCLUDE_DIR="       f"{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/include/libxml2",
+        "-DLIBXML2_LIBRARIES="         f"{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/lib/libxml2.{LIBRARY_EXT}"
    ])

-run_cmake("", cmake_args, cmake_dir=CMAKE_DIR, cwd=executables_dir)
+if "hdf5" in targets:
+    cmake_args.extend([
+        "-DHDF5_INCLUDE_DIR="          f"{DEPS_DIR}/install/hdf5-{HDF5_VERSION}/include",
+        "-DHDF5_LIBRARY_DIR="          f"{DEPS_DIR}/install/hdf5-{HDF5_VERSION}/lib"
+    ])
+
+run_cmake("", exec_args + cmake_args, cmake_dir=CMAKE_DIR, cwd=executables_dir)

 logger.info("\rBuilding executables...   ")

-run([make, "-j{IFCOS_NUM_BUILD_PROCS}".format(**locals())], cwd=executables_dir)
+run([make, f"-j{IFCOS_NUM_BUILD_PROCS}"], cwd=executables_dir)
 run([make, "install/strip" if BUILD_CFG == "Release" else "install"], cwd=executables_dir)

 if "IfcOpenShell-Python" in targets:
-
    # On OSX the actual Python library is not linked against.
-    ADDITIONAL_ARGS=""
-    if get_os() == "Darwin":
-        ADDITIONAL_ARGS="-Wl,-flat_namespace,-undefined,suppress"
+    ADDITIONAL_ARGS = ""
+    if platform.system() == "Darwin":
+        ADDITIONAL_ARGS = "-Wl,-flat_namespace,-undefined,suppress"

-    os.environ["CXXFLAGS"]="%s %s" % (CXXFLAGS_MINIMAL, ADDITIONAL_ARGS)
-    os.environ["CFLAGS"]="%s %s" % (CFLAGS_MINIMAL, ADDITIONAL_ARGS)
-    os.environ["LDFLAGS"]="%s %s" % (LDFLAGS, ADDITIONAL_ARGS)
+    os.environ["CXXFLAGS"] = f"{CXXFLAGS_MINIMAL} {ADDITIONAL_ARGS}"
+    os.environ["CFLAGS"] = f"{CFLAGS_MINIMAL} {ADDITIONAL_ARGS}"
+    os.environ["LDFLAGS"] = f"{LDFLAGS} {ADDITIONAL_ARGS}"

-    for PYTHON_VERSION, _, TAG in PYTHON_VERSION_CONFS():
-        logger.info("\rConfiguring python {PYTHON_VERSION}{TAG} wrapper...".format(**locals()))
+    python_dir = os.path.join(IFCOS_DIR, "pythonwrapper")
+    os.makedirs(python_dir, exist_ok=True)

-        # python_dir = os.path.join(IFCOS_DIR, "python-{PYTHON_VERSION}{TAG}".format(**locals()))
-        python_dir = os.path.join(IFCOS_DIR, "pythonwrapper")
-        if not os.path.exists(python_dir):
-            os.makedirs(python_dir)
+    def compile_python_wrapper(python_version, python_library, python_include, python_executable):
+        logger.info(f"\rConfiguring python {python_version} wrapper...")

        cache_path = os.path.join(python_dir, "CMakeCache.txt")
        if os.path.exists(cache_path):
-            os.unlink(cache_path)
+            os.remove(cache_path)

-        PYTHON_LIBRARY=run([bash, "-c", "ls    {DEPS_DIR}/install/python-{PYTHON_VERSION}{TAG}/lib/libpython*.*".format(**locals())])
-        PYTHON_INCLUDE=run([bash, "-c", "ls -d {DEPS_DIR}/install/python-{PYTHON_VERSION}{TAG}/include/python*".format(**locals())])
-        PYTHON_EXECUTABLE=os.path.join(DEPS_DIR, "install", "python-{PYTHON_VERSION}{TAG}".format(**locals()), "bin", "python{PYTHON_VERSION[0]}".format(**locals()))
-        os.environ["PYTHON_LIBRARY_BASENAME"]=os.path.basename(PYTHON_LIBRARY)
+        os.environ["PYTHON_LIBRARY_BASENAME"] = os.path.basename(python_library)

        run_cmake("",
-            cmake_args=[
-                "-DBUILD_SHARED_LIBS="       "OFF" if BUILD_STATIC else "ON",
-                "-DBOOST_ROOT="              "{DEPS_DIR}/install/boost-{BOOST_VERSION}".format(**locals()),
-                "-DOCC_INCLUDE_DIR="         +occ_include_dir,
-                "-DOCC_LIBRARY_DIR="         +occ_library_dir,
-                "-DPYTHON_LIBRARY="          +PYTHON_LIBRARY,
-                "-DPYTHON_EXECUTABLE="       +PYTHON_EXECUTABLE,
-                "-DPYTHON_INCLUDE_DIR="      +PYTHON_INCLUDE,
-                "-DSWIG_EXECUTABLE="         "{DEPS_DIR}/install/swig/bin/swig".format(**locals()),
-                "-DCMAKE_INSTALL_PREFIX="    "{DEPS_DIR}/install/ifcopenshell/tmp".format(**locals()),
-                "-DLIBXML2_INCLUDE_DIR="     "{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/include/libxml2".format(**locals()),
-                "-DLIBXML2_LIBRARIES="       "{DEPS_DIR}/install/libxml2-{LIBXML2_VERSION}/lib/libxml2.{LIBRARY_EXT}".format(**locals()),
-                "-DCOLLADA_SUPPORT=OFF"
+            cmake_args + [
+                "-DPYTHON_LIBRARY="          +python_library,
+                "-DPYTHON_EXECUTABLE="       +python_executable,
+                "-DPYTHON_INCLUDE_DIR="      +python_include,
+                "-DSWIG_EXECUTABLE="         f"{DEPS_DIR}/install/swig/bin/swig",
+                "-DCMAKE_INSTALL_PREFIX="    f"{DEPS_DIR}/install/ifcopenshell/tmp",
+                "-DUSERSPACE_PYTHON_PREFIX=" +["Off", "On"][os.environ.get("PYTHON_USER_SITE", "").lower() in {"1", "on", "true"}]
            ], cmake_dir=CMAKE_DIR, cwd=python_dir)
-        
-        logger.info("\rBuilding python %s%s wrapper...   " % (PYTHON_VERSION, TAG))

-        run([make, "-j%s" % (IFCOS_NUM_BUILD_PROCS,), "_ifcopenshell_wrapper"], cwd=python_dir)
+        logger.info(f"\rBuilding python {python_version} wrapper...   ")
+
+        run([make, f"-j{IFCOS_NUM_BUILD_PROCS}", "_ifcopenshell_wrapper"], cwd=python_dir)
        run([make, "install/local"], cwd=os.path.join(python_dir, "ifcwrap"))

-        module_dir = os.path.dirname(run([PYTHON_EXECUTABLE, "-c", "from __future__ import print_function; import inspect, ifcopenshell; print(inspect.getfile(ifcopenshell))"]))
+        module_dir = os.path.dirname(run([python_executable, "-c", "import inspect, ifcopenshell; print(inspect.getfile(ifcopenshell))"]))

-        if get_os() != "Darwin":
+        if platform.system() != "Darwin":
            # TODO: This symbol name depends on the Python version?
            run([strip, "-s", "-K", "PyInit__ifcopenshell_wrapper", "_ifcopenshell_wrapper.so"], cwd=module_dir)
+        return module_dir

-        run([cp, "-R", module_dir, os.path.join(DEPS_DIR, "install", "ifcopenshell", "python-%s%s" % (PYTHON_VERSION, TAG))])
+
+    if USE_CURRENT_PYTHON_VERSION:
+        python_info = sysconfig.get_paths()
+        python_lib = os.path.join(
+            sysconfig.get_config_var('LIBDIR'), 
+            sysconfig.get_config_var('multiarchsubdir').replace("/", ""), 
+            sysconfig.get_config_var("INSTSONAME")
+        )
+        compile_python_wrapper(platform.python_version(), python_lib, python_info["include"], sys.executable)
+    else:
+        for python_version in PYTHON_VERSIONS:
+            python_library = run([bash, "-c", f"ls    {DEPS_DIR}/install/python-{python_version}/lib/libpython*.*"])
+            python_include = run([bash, "-c", f"ls -d {DEPS_DIR}/install/python-{python_version}/include/python*"])
+            python_executable = os.path.join(DEPS_DIR, "install", f"python-{python_version}", "bin", f"python{python_version[0]}")
+
+            module_dir = compile_python_wrapper(python_version, python_library, python_include, python_executable)
+            run([cp, "-R", module_dir, os.path.join(DEPS_DIR, "install", "ifcopenshell", f"python-{python_version}")])

 logger.info("\rBuilt IfcOpenShell...\n\n")
@@ -0,0 +1,621 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
@@ -0,0 +1,2 @@
+include src/bcf/v2/xsd/*.xsd
+include src/bcf/v3/xsd/*.xsd
@@ -4,23 +4,26 @@ A simple Python implementation of BCF. The data model is described in `data.py`.
 Manipulation of BCF-XML is available via `bcfxml.py` and manipulation of BCF-API
 is available via `bcfapi.py`.

-Currently supports BCF version 2.1.
+- BCF-XML version 2.1: Fully supported
+- BCF-API version 2.1: Not supported, will probably tackle this after BCF-API v3.0
+- BCF-XML version 3.0: Almost fully supported, except for the documents module
+- BCF-API version 3.0: Almost fully supported, except for two requests.

 ## bcfxml

 The `bcfxml` module lets you interact with the BCF-XML standard.

-```
-from bcf.bcfxml import BcfXml
+```python
+from bcf import bcfxml

-bcfxml = BcfXml()

 # Load a project
-project = bcfxml.get_project("/path/to/file.bcf")
+bcfxml = bcfxml.load("/path/to/file.bcf")
+

 # The project is also stored in the module
 # project == bcfxml.project
-
+project=bcfxml.get_project()
 print(project.name)

 # To edit a project, just modify the object directly
@@ -57,3 +60,42 @@ topic = bcfxml.get_topic(guid)
 topic.title = "New title"
 bcfxml.edit_topic(topic)
 ```
+
+## bcfapi
+
+The `bcfapi` module lets you interact with the BCF-API standard.
+
+```python
+from bcf.v3.bcfapi import FoundationClient, BcfClient
+
+foundation_client = FoundationClient("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET", "OPENCDE_BASEURL")
+auth_methods = foundation_client.get_auth_methods()
+
+# Our library currently only implements the authorization_code flow
+if "authorization_code" in auth_methods:
+    foundation_client.login()
+
+bcf_client = BcfClient(foundation_client)
+
+versions = foundation_client.get_versions()
+for version in versions:
+if "3.0" in versions:
+    if version["api_id"] == "bcf" and version["version_id"] == "3.0":
+        bcf_client.set_version(version)
+
+data = bcf_client.get_projects()
+print(data)
+project_id = data[0]["project_id"]
+print(project_id)
+data = bcf_client.get_project(project_id)
+print(data)
+data = bcf_client.get_extensions(project_id)
+print(data)
+```
+
+## Todo List
+
+The remaining work that needs to be completed in `bcfxml.py` and `bcfapi.py`.
+
+- For `bcfxml.py` two xsds support is remaining namely 'documents.xsd`and`extensions.xsd`.
+- For `bcfapi.py` two requests that are `get_topics` and `get_comments` are remaining.
@@ -0,0 +1,12 @@
+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel"
+]
+build-backend = "setuptools.build_meta"
+
+[tool.black]
+line-length = 120
+
+[tool.isort]
+profile = "black"
@@ -0,0 +1 @@
+xmlschema
@@ -0,0 +1,37 @@
+[metadata]
+name=bcf-client
+version=0.0.1
+author = Ifcopenshell
+description = A simple Python implementation of BCF
+url = https://github.com/IfcOpenShell/IfcOpenShell
+project_urls =
+    Code=https://github.com/IfcOpenShell/IfcOpenShell
+    Issues=https://github.com/IfcOpenShell/IfcOpenShell/issues
+long_description = file: README.md
+long_description_content_type = text/markdown
+classifiers =
+    License :: OSI Approved :: GNU General Public License v3 (GPLv3)
+    Operating System :: OS Independent
+    Programming Language :: Python :: 3
+    Topic :: Scientific/Engineering
+    Topic :: Utilities
+keywords =
+    Python
+    file formats
+    engineering
+
+[options]
+package_dir =
+    = src
+packages = find:
+python_requires = >=3
+install_requires=
+    xmlschema
+include_package_data = True
+
+[options.packages.find]
+where = src
+
+[flake8]
+max-line-length = 120
+ignore = E24, E121, E123, E126, E203, E226, E704, E741, W503, W504
@@ -0,0 +1,17 @@
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
@@ -0,0 +1,61 @@
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import os.path
+import zipfile
+import tempfile
+from xml.dom import minidom
+
+
+def load(filepath):
+    filepath = extract_project(filepath)
+    if os.path.isfile(os.path.join(filepath, "bcf.version")):
+        version_path = os.path.join(filepath, "bcf.version")
+        version_id = get_version(version_path)
+        # TODO: we actually coded it for 2.1, let's check the difference between 2.0 and 2.1
+        if version_id == "2.1" or version_id == "2.0":
+            from bcf.v2.bcfxml import BcfXml
+
+            bcfxml = BcfXml()
+            bcfxml.filepath = filepath
+            return bcfxml
+        elif version_id == "3.0":
+            from bcf.v3.bcfxml import BcfXml
+
+            bcfxml = BcfXml()
+            bcfxml.filepath = filepath
+            return bcfxml
+        else:
+            raise Exception(f"Version {version_id} not supported.")
+
+
+def get_version(version_path):
+    xmlparse = minidom.parse(version_path)
+    version_el = xmlparse.getElementsByTagName("Version")[0]
+    version = version_el.getAttribute("VersionId")
+    return version
+
+
+def extract_project(filepath):
+    if not filepath:
+        return
+    zip_file = zipfile.ZipFile(filepath)
+    filepath = tempfile.mkdtemp()
+    zip_file.extractall(filepath)
+    return filepath
@@ -0,0 +1,19 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
@@ -1,10 +1,29 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import uuid
 import shutil
 import zipfile
 import logging
 import tempfile
-import bcf.data
+import bcf.v2.data
 from datetime import datetime
 from xml.dom import minidom
 from xmlschema import XMLSchema
@@ -30,7 +49,7 @@ class BcfXml:
        self.filepath = None
        self.logger = logging.getLogger("bcfxml")
        self.author = "john@doe.com"
-        self.project = bcf.data.Project()
+        self.project = bcf.v2.data.Project()
        self.version = "2.1"
        self.topics = {}

@@ -47,12 +66,12 @@ class BcfXml:
    def get_project(self, filepath=None):
        if not filepath:
            return self.project
-        zip_file = zipfile.ZipFile(filepath)
-        self.filepath = tempfile.mkdtemp()
-        zip_file.extractall(self.filepath)
-        data = self._read_xml("project.bcfp", "project.xsd")
-        self.project.project_id = data["Project"]["@ProjectId"]
-        self.project.name = data["Project"]["Name"]
+        if os.path.isfile(os.path.join(self.filepath, "project.bcfp")):
+            data = self._read_xml("project.bcfp", "project.xsd")
+            self.project.extension_schema = data["ExtensionSchema"]
+            if "Project" in data:
+                self.project.project_id = data["Project"]["@ProjectId"]
+                self.project.name = data["Project"].get("Name")
        return self.project

    def edit_project(self):
@@ -92,6 +111,12 @@ class BcfXml:
            subdirs = dirnames
            break
        for subdir in subdirs:
+            try:
+                uuid.UUID(subdir)
+            except ValueError:
+                continue
+            if not os.path.exists(os.path.join(self.filepath, subdir, "markup.bcf")):
+                continue
            self.topics[subdir] = self.get_topic(subdir)
        return self.topics

@@ -99,9 +124,9 @@ class BcfXml:
        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
        if "Header" not in data:
            return
-        header = bcf.data.Header()
+        header = bcf.v2.data.Header()
        for item in data["Header"]["File"]:
-            header_file = bcf.data.HeaderFile()
+            header_file = bcf.v2.data.HeaderFile()
            optional_keys = {
                "filename": "Filename",
                "date": "Date",
@@ -121,7 +146,7 @@ class BcfXml:
        if guid in self.topics:
            return self.topics[guid]
        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
-        topic = bcf.data.Topic()
+        topic = bcf.v2.data.Topic()
        self.topics[guid] = topic

        mandatory_keys = {
@@ -152,7 +177,7 @@ class BcfXml:
                setattr(topic, key, data["Topic"][value])

        if "BimSnippet" in data["Topic"]:
-            bim_snippet = bcf.data.BimSnippet()
+            bim_snippet = bcf.v2.data.BimSnippet()
            keys = {
                "snippet_type": "@SnippetType",
                "is_external": "@IsExternal",
@@ -166,7 +191,7 @@ class BcfXml:

        if "DocumentReference" in data["Topic"]:
            for item in data["Topic"]["DocumentReference"]:
-                document_reference = bcf.data.DocumentReference()
+                document_reference = bcf.v2.data.DocumentReference()
                keys = {
                    "referenced_document": "ReferencedDocument",
                    "is_external": "@IsExternal",
@@ -180,14 +205,14 @@ class BcfXml:

        if "RelatedTopic" in data["Topic"]:
            for item in data["Topic"]["RelatedTopic"]:
-                related_topic = bcf.data.RelatedTopic()
+                related_topic = bcf.v2.data.RelatedTopic()
                related_topic.guid = item["@Guid"]
                topic.related_topics.append(related_topic)
        return topic

    def add_topic(self, topic=None):
        if topic is None:
-            topic = bcf.data.Topic()
+            topic = bcf.v2.data.Topic()
        if not topic.guid:
            topic.guid = str(uuid.uuid4())
        if not topic.title:
@@ -285,9 +310,12 @@ class BcfXml:
                    "isExternal": f.is_external,
                },
            )
-            self._create_element(file_el, "Filename", text=f.filename)
-            self._create_element(file_el, "Date", text=f.date)
-            self._create_element(file_el, "Reference", text=f.reference)
+            if f.filename:
+                self._create_element(file_el, "Filename", text=f.filename)
+            if f.date:
+                self._create_element(file_el, "Date", text=f.date)
+            if f.reference:
+                self._create_element(file_el, "Reference", text=f.reference)

    def write_comments(self, comments, root):
        for comment in comments.values():
@@ -307,7 +335,7 @@ class BcfXml:

    def add_comment(self, topic, comment=None):
        if comment is None:
-            comment = bcf.data.Comment()
+            comment = bcf.v2.data.Comment()
        if not comment.guid:
            comment.guid = str(uuid.uuid4())
        if not comment.comment:
@@ -441,7 +469,7 @@ class BcfXml:
        for bitmap in viewpoint.bitmaps:
            bitmap_el = self._create_element(parent, "Bitmap")

-            text_map = {"Bitmap": bitmap.bitmap_type, "Reference": bitmap.reference}
+            text_map = {"Bitmap": bitmap.bitmap_format, "Reference": bitmap.reference}
            for key, value in text_map.items():
                self._create_element(bitmap_el, key, text=value)

@@ -468,7 +496,7 @@ class BcfXml:

    def add_viewpoint(self, topic, viewpoint=None):
        if not viewpoint:
-            viewpoint = bcf.data.Viewpoint()
+            viewpoint = bcf.v2.data.Viewpoint()
        if not viewpoint.guid:
            viewpoint.guid = str(uuid.uuid4())
        if not viewpoint.viewpoint:
@@ -569,7 +597,7 @@ class BcfXml:
            header_file.is_external = False
        header_file.date = datetime.utcnow().isoformat()
        if not topic.header:
-            topic.header = bcf.data.Header()
+            topic.header = bcf.v2.data.Header()
        topic.header.files.append(header_file)
        self.edit_topic(topic)

@@ -579,7 +607,7 @@ class BcfXml:
        if "Comment" not in data:
            return comments
        for item in data["Comment"]:
-            comment = bcf.data.Comment()
+            comment = bcf.v2.data.Comment()
            mandatory_keys = {"guid": "@Guid", "date": "Date", "author": "Author", "comment": "Comment"}
            for key, value in mandatory_keys.items():
                setattr(comment, key, item[value])
@@ -588,7 +616,7 @@ class BcfXml:
                if value in item:
                    setattr(comment, key, item[value])
            if "Viewpoint" in item:
-                viewpoint = bcf.data.Viewpoint()
+                viewpoint = bcf.v2.data.Viewpoint()
                viewpoint.guid = item["Viewpoint"]["@Guid"]
                comment.viewpoint = viewpoint
            comments[comment.guid] = comment
@@ -607,7 +635,7 @@ class BcfXml:
        return viewpoints

    def get_viewpoint(self, data, topic_guid):
-        viewpoint = bcf.data.Viewpoint()
+        viewpoint = bcf.v2.data.Viewpoint()
        viewpoint.guid = data["@Guid"]
        optional_keys = {"viewpoint": "Viewpoint", "snapshot": "Snapshot", "index": "Index"}
        for key, value in optional_keys.items():
@@ -625,10 +653,10 @@ class BcfXml:
    def get_viewpoint_components(self, visinfo):
        if "Components" not in visinfo:
            return None
-        components = bcf.data.Components()
+        components = bcf.v2.data.Components()
        data = visinfo["Components"]
        if "ViewSetupHints" in data:
-            view_setup_hints = bcf.data.ViewSetupHints()
+            view_setup_hints = bcf.v2.data.ViewSetupHints()
            optional_keys = {
                "spaces_visible": "@SpacesVisible",
                "space_boundaries_visible": "@SpaceBoundariesVisible",
@@ -642,7 +670,7 @@ class BcfXml:
            for item in data["Selection"]["Component"]:
                components.selection.append(self.get_component(item))
        if "Visibility" in data:
-            component_visibility = bcf.data.ComponentVisibility()
+            component_visibility = bcf.v2.data.ComponentVisibility()
            if "@DefaultVisibility" in data["Visibility"]:
                component_visibility.default_visibility = data["Visibility"]["@DefaultVisibility"]
            if "Exceptions" in data["Visibility"] and "Component" in data["Visibility"]["Exceptions"]:
@@ -651,7 +679,7 @@ class BcfXml:
            components.visibility = component_visibility
        if "Coloring" in data and "Color" in data["Coloring"]:
            for item in data["Coloring"]["Color"]:
-                color = bcf.data.Color()
+                color = bcf.v2.data.Color()
                color.color = item["@Color"]
                for item2 in item["Component"]:
                    color.components.append(self.get_component(item2))
@@ -661,7 +689,7 @@ class BcfXml:
    def get_viewpoint_orthogonal_camera(self, visinfo):
        if "OrthogonalCamera" not in visinfo:
            return None
-        camera = bcf.data.OrthogonalCamera()
+        camera = bcf.v2.data.OrthogonalCamera()
        data = visinfo["OrthogonalCamera"]
        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
        self.set_vector(camera.camera_direction, data["CameraDirection"])
@@ -672,7 +700,7 @@ class BcfXml:
    def get_viewpoint_perspective_camera(self, visinfo):
        if "PerspectiveCamera" not in visinfo:
            return None
-        camera = bcf.data.PerspectiveCamera()
+        camera = bcf.v2.data.PerspectiveCamera()
        data = visinfo["PerspectiveCamera"]
        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
        self.set_vector(camera.camera_direction, data["CameraDirection"])
@@ -685,7 +713,7 @@ class BcfXml:
            return []
        lines = []
        for item in visinfo["Lines"]["Line"]:
-            line = bcf.data.Line()
+            line = bcf.v2.data.Line()
            self.set_vector(line.start_point, item["StartPoint"])
            self.set_vector(line.end_point, item["EndPoint"])
            lines.append(line)
@@ -696,7 +724,7 @@ class BcfXml:
            return []
        planes = []
        for item in visinfo["ClippingPlanes"]["ClippingPlane"]:
-            plane = bcf.data.ClippingPlane()
+            plane = bcf.v2.data.ClippingPlane()
            self.set_vector(plane.location, item["Location"])
            self.set_vector(plane.direction, item["Direction"])
            planes.append(plane)
@@ -707,9 +735,9 @@ class BcfXml:
            return []
        bitmaps = []
        for item in visinfo["Bitmap"]:
-            bitmap = bcf.data.Bitmap()
+            bitmap = bcf.v2.data.Bitmap()
            bitmap.reference = item["Reference"]
-            bitmap.bitmap_type = item["Bitmap"].upper()
+            bitmap.bitmap_format = item["Bitmap"].upper()
            self.set_vector(bitmap.location, item["Location"])
            self.set_vector(bitmap.normal, item["Normal"])
            self.set_vector(bitmap.up, item["Up"])
@@ -723,7 +751,7 @@ class BcfXml:
        to_obj.z = from_xml["Z"]

    def get_component(self, data):
-        component = bcf.data.Component()
+        component = bcf.v2.data.Component()
        optional_keys = {
            "originating_system": "OriginatingSystem",
            "authoring_tool_id": "AuthoringToolId",
@@ -1,7 +1,27 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
 class Project:
    def __init__(self):
        self.project_id = ""
        self.name = ""
+        self.extension_schema = ""


 class BimSnippet:
@@ -156,7 +176,7 @@ class Bitmap:
    def __init__(self):
        self.reference = ""  # Only in BCF-XML
        self.bitmap_data = None  # Only in BCF-API
-        self.bitmap_type = "PNG"  # Enum of png or jpg
+        self.bitmap_format = "PNG"  # Enum of png or jpg
        self.location = Point()
        self.normal = Direction()
        self.up = Direction()
@@ -0,0 +1,19 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
@@ -0,0 +1,603 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
+import uuid
+import time
+import json
+import urllib
+import requests
+import webbrowser
+import http.server
+import base64
+import tempfile
+import os
+
+client_id, client_secret = "", ""
+
+
+class OAuthReceiver(http.server.BaseHTTPRequestHandler):
+    def do_GET(self):
+        query = urllib.parse.parse_qs(urllib.parse.urlparse(self.path).query)
+        self.server.auth_code = query.get("code", [""])[0]
+        self.server.auth_state = query.get("state", [""])[0]
+        self.send_response(200)
+        self.send_header("Content-type", "text/plain")
+        self.end_headers()
+        self.wfile.write("You have now authenticated :) You may now close this browser window.".encode("utf-8"))
+
+
+class FoundationClient:
+    def __init__(self, client_id, client_secret, base_url=None, redirect_subdir=None):
+        self.baseurl = base_url
+        self.access_token = ""
+        self.refresh_token = ""
+        self.access_token_expires_on = time.time()
+        self.refresh_token_expires_on = float("inf")
+        self.auth_endpoint = None
+        self.token_endpoint = None
+        self.client_id = client_id
+        self.client_secret = client_secret
+        self.auth_method = None
+        self.redirect_subdir = redirect_subdir
+
+    def get_access_token(self):
+        if self.access_token and self.access_token_expires_on > time.time():
+            return self.access_token
+        elif self.refresh_token and self.refresh_token_expires_on > time.time():
+            self.get_refresh_token()
+        else:
+            self.login()
+        return self.access_token
+
+    def get_auth_methods(self):
+        resp = requests.get(f"{self.baseurl}foundation/1.0/auth")
+        return resp.json()["supported_oauth2_flows"]
+
+    def get_versions(self):
+        resp = requests.get(f"{self.baseurl}foundation/versions")
+        return resp.json()["versions"]
+
+    def login(self):
+        resp = requests.get(f"{self.baseurl}foundation/1.0/auth")
+        values = resp.json()
+        self.auth_endpoint = values["oauth2_auth_url"]
+        self.token_endpoint = values["oauth2_token_url"]
+
+        with http.server.HTTPServer(("", 8080), OAuthReceiver) as server:
+            state = str(uuid.uuid4())
+            query = urllib.parse.urlencode(
+                {
+                    "client_id": self.client_id,
+                    "response_type": "code",
+                    "state": state,
+                    "redirect_uri": f"http://localhost:{server.server_address[1]}/{self.redirect_subdir}",
+                }
+            )
+            if "?" in self.auth_endpoint:
+                webbrowser.open(f"{self.auth_endpoint}&{query}")
+            else:
+                webbrowser.open(f"{self.auth_endpoint}?{query}")
+            server.timeout = 100
+            server.state = state
+            server.handle_request()
+            if server.auth_code and server.auth_state == state:
+                data = {
+                    "grant_type": "authorization_code",
+                    "code": server.auth_code,
+                    "redirect_uri": f"http://localhost:{server.server_address[1]}/{self.redirect_subdir}",
+                }
+                auth_string = f"{self.client_id}:{self.client_secret}"
+                header_string = base64.b64encode(auth_string.encode("utf-8")).decode("utf-8")
+                headers = {"Authorization": f"Basic {header_string}"}
+                self.set_tokens_from_response(requests.post(self.token_endpoint, data=data, headers=headers))
+
+    def get_refresh_token(self):
+        self.set_tokens_from_response(
+            requests.post(
+                self.token_endpoint,
+                params={
+                    "grant_type": "refresh_token",
+                    "refresh_token": self.refresh_token,
+                },
+            ).json()
+        )
+
+    def get_new_access_token(self):
+        auth_string = f"{self.client_id}:{self.client_secret}"
+        header_string = base64.b64encode(auth_string.encode("utf-8")).decode("utf-8")
+        headers = {"Authorization": f"Basic {header_string}"}
+        self.set_tokens_from_response(
+            requests.post(
+                self.token_endpoint,
+                data={
+                    "grant_type": "refresh_token",
+                    "refresh_token": self.refresh_token,
+                },
+                headers=headers,
+            ).json()
+        )
+
+    def set_auth_method(self, method="authorization_code_grant"):
+        if method != "authorization_code_grant":
+            raise NotImplementedError(f"{method} not supported")
+        else:
+            self.auth_method = method
+
+    def set_tokens_from_response(self, response):
+        response = response.json()
+        self.access_token = response["access_token"]
+        self.refresh_token = response["refresh_token"]
+        self.access_token_expires_on = time.time() + response["expires_in"]
+        if "refresh_token_expires_in" in response:
+            self.refresh_token_expires_on = time.time() + response["refresh_token_expires_in"]
+
+
+class BcfClient:
+    def __init__(self, foundation_client):
+        self.foundation_client = foundation_client
+        self.version_id = None
+        self.baseurl = None
+        self.filepath = tempfile.mkdtemp()
+
+    def set_version(self, version):
+        self.version_id = version["version_id"]
+        self.baseurl = version["api_base_url"]
+
+    def get(self, endpoint, params=None, is_auth_required=False):
+        # TODO: handle error http status codes and raise exception. Follow error.json standard.
+        headers = {"Authorization": "Bearer " + self.foundation_client.get_access_token()}
+        response = requests.get(f"{self.baseurl}{endpoint}", headers=headers, params=params or None)
+        try:
+            response = requests.get(f"{self.baseurl}{endpoint}", headers=headers, params=params or None)
+            if response.status_code == 200:
+                return response.json()
+            response.raise_for_status()
+        except requests.exceptions.HTTPError as e:
+            print(f"message: {response.reason}'   '{response.status_code}'   '{ e }")
+
+    def post(self, endpoint, data=None, params=None):
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/json",
+        }
+        try:
+            response = requests.post(
+                f"{self.baseurl}{endpoint}",
+                headers=headers,
+                params=params or None,
+                data=data or None,
+            )
+            if response.status_code == 201:
+                return response.status_code, response.text
+            response.raise_for_status()
+        except requests.exceptions.HTTPError as errh:
+            print(f"message: {response.reason}'  '{response.status_code}, {errh}")
+
+    def put(self, endpoint, data=None, params=None):
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/json",
+        }
+        try:
+            response = requests.put(
+                f"{self.baseurl}{endpoint}",
+                headers=headers,
+                params=params or None,
+                data=data or None,
+            )
+            if response.status_code == 200:
+                return response.status_code, response.text
+            response.raise_for_status()
+        except requests.exceptions.HTTPError as errh:
+            print(f"message: {response.reason}'  '{response.status_code}, {errh}")
+
+    def delete(self, endpoint, params=None):
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/json",
+        }
+        try:
+            response = requests.delete(
+                f"{self.baseurl}{endpoint}",
+                headers=headers,
+                params=params or None,
+            )
+            if response.status_code == 200:
+                return response.status_code, response.text
+            response.raise_for_status()
+        except requests.exceptions.HTTPError as errh:
+            print(f"message: {response.reason}'  '{response.status_code}, {errh}")
+
+    def get_projects(self) -> list:
+        return self.get(
+            f"/projects",
+        )
+
+    def get_project(
+        self,
+        project_id="",
+    ) -> dict:
+        return self.get(
+            f"/projects/{project_id}",
+            {
+                "project_id": project_id,
+            },
+        )
+
+    def update_project(self, project_id="", data=None) -> dict:
+        url = f"{self.baseurl}/projects/{project_id}"
+        headers = {"Authorization": "Bearer " + self.foundation_client.get_access_token()}
+        resp = requests.put(url, headers=headers, data=data)
+        return resp.status_code, resp.text
+
+    def get_extensions(
+        self,
+        project_id="",
+    ) -> dict:
+        return self.get(
+            f"/projects/{project_id}/extensions",
+            {
+                "project_id": project_id,
+            },
+        )
+
+    def get_topics(
+        self,
+        project_id="",
+        topics="",
+        query_string=None,
+    ) -> list:
+        # return self.get(
+        #     f"/projects/{project_id}/topics",
+        #     {
+        #         "project_id": project_id,
+        #         "topics": topics,
+        #         "query_string": query_string,
+        #     },
+        # )
+        pass
+
+    def get_topic(self, project_id="", topic_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def create_topic(self, project_id="", data=None):
+        return self.post(f"/projects/{project_id}/topics", data=data)
+
+    def update_topic(self, project_id="", topic_id="", data=None) -> dict:
+        return self.put(f"/projects/{project_id}/topics/{topic_id}", data=data)
+
+    def delete_topic(self, project_id="", topic_id=""):
+        return self.delete(f"/projects/{project_id}/topics/{topic_id}")
+
+    def get_snippet(self, project_id="", topic_id="") -> str:
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/octet-stream",
+        }
+        response = requests.get(
+            f"{self.baseurl}/projects/{project_id}/topics/{topic_id}/snippet",
+            headers=headers,
+        )
+        # TODO: write to tmpdir
+        with open(os.path.join(self.filepath, f"{project_id}_{topic_id}_snippet.txt"), "wb") as f:
+            f.write(response.content.decode("utf-8"))
+        return response.status_code, response.content
+
+    def update_snippet(self, project_id="", topic_id="", files=None, data=None):
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/octet-stream",
+        }
+        response = requests.put(
+            f"{self.baseurl}/projects/{project_id}/topics/{topic_id}/snippet",
+            headers=headers,
+            files=files,
+        )
+        return response.status_code
+
+    def get_files_information(self, project_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/files_information",
+            {
+                "project_id": project_id,
+            },
+        )
+
+    def get_files(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/files",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def update_files(
+        self,
+        project_id="",
+        topic_id="",
+        data=None,
+        params=None,
+    ):
+        return self.put(
+            f"/projects/{project_id}/topics/{topic_id}/files",
+            data=data,
+        )
+
+    def get_comments(self, project_id="", topic_id="") -> list:
+        pass
+
+    def create_comments(
+        self,
+        project_id="",
+        topic_id="",
+        data=None,
+        params=None,
+    ):
+        return self.post(
+            f"/projects/{project_id}/topics/{topic_id}/comments",
+            data=data,
+        )
+
+    def get_comment(self, project_id="", topic_id="", comment_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/comments/{comment_id}",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "comment_id": comment_id,
+            },
+        )
+
+    def delete_comment(self, project_id="", topic_id="", comment_id=""):
+        return self.delete(f"/projects/{project_id}/topics/{topic_id}/comments/{comment_id}")
+
+    def update_comment(
+        self,
+        project_id="",
+        topic_id="",
+        comment_id="",
+        data=None,
+    ):
+        return self.put(
+            f"/projects/{project_id}/topics/{topic_id}/comments/{comment_id}",
+            data=data,
+        )
+
+    def get_viewpoints(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def create_viewpoints(self, project_id="", topic_id="", data=None):
+        return self.post(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints",
+            data=data,
+        )
+
+    def get_viewpoint(self, project_id="", topic_id="", viewpoint_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+            },
+        )
+
+    def delete_viewpoint(
+        self,
+        project_id="",
+        topic_id="",
+        viewpoint_id="",
+    ):
+        return self.delete(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}",
+        )
+
+    def get_snapshot(self, project_id="", topic_id="", viewpoint_id="") -> str:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}/snapshot",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+            },
+        )
+
+    def get_bitmap(self, project_id="", topic_id="", viewpoint_id="", bitmap_id="") -> str:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}/bitmaps/{bitmap_id}",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+                "bitmap_id": bitmap_id,
+            },
+        )
+
+    def get_selection(self, project_id="", topic_id="", viewpoint_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}/selection",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+            },
+        )
+
+    def get_coloring(self, project_id="", topic_id="", viewpoint_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}/coloring",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+            },
+        )
+
+    def get_visibility(self, project_id="", topic_id="", viewpoint_id="") -> dict:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/viewpoints/{viewpoint_id}/visibility",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "viewpoint_id": viewpoint_id,
+            },
+        )
+
+    def get_related_topics(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/related_topics",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def update_related_topics(
+        self,
+        project_id="",
+        topic_id="",
+        data=None,
+    ):
+        return self.put(
+            f"/projects/{project_id}/topics/{topic_id}/related_topics",
+            data=data,
+        )
+
+    def get_document_references(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/document_references",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def create_document_reference(
+        self,
+        project_id="",
+        topic_id="",
+        data=None,
+    ):
+        return self.post(
+            f"/projects/{project_id}/topics/{topic_id}/document_references",
+            data=data,
+        )
+
+    def update_document_references(
+        self,
+        project_id="",
+        topic_id="",
+        document_reference_id="",
+        data=None,
+    ):
+        return self.put(
+            f"/projects/{project_id}/topics/{topic_id}/document_references/{document_reference_id}",
+            data=data,
+        )
+
+    def get_documents(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/documents",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def create_document(
+        self,
+        project_id="",
+        topic_id="",
+        guid=None,
+        files=None,
+        data=None,
+    ):
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/octet-stream",
+        }
+        response = requests.post(
+            f"/projects/{project_id}/topics/{topic_id}/documents",
+            data=data,
+            params={guid},
+            files=files,
+            headers=headers,
+        )
+        return response.status_code
+
+    def get_document(self, project_id="", topic_id="", document_id="") -> str:
+        headers = {
+            "Authorization": "Bearer " + self.foundation_client.get_access_token(),
+            "Content-type": "application/octet-stream",
+        }
+        response = requests.get(
+            f"{self.baseurl}/projects/{project_id}/topics/documents/{document_id}",
+            headers=headers,
+        )
+        with open(os.path.join(self.filepath, f"{project_id}_{topic_id}_{document_id}_document.txt"), "wb") as f:
+            f.write(response.content.decode("utf-8"))
+        return response.status_code, response.content
+
+    def get_topics_events(self, project_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/events",
+            {
+                "project_id": project_id,
+            },
+        )
+
+    def get_topic_events(self, project_id="", topic_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/events",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+            },
+        )
+
+    def get_comments_events(self, project_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/comments/events",
+            {
+                "project_id": project_id,
+            },
+        )
+
+    def get_comment_events(self, project_id="", topic_id="", comment_id="") -> list:
+        return self.get(
+            f"/projects/{project_id}/topics/{topic_id}/comments/{comment_id}/events",
+            {
+                "project_id": project_id,
+                "topic_id": topic_id,
+                "comment_id": comment_id,
+            },
+        )
@@ -0,0 +1,847 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import uuid
+import shutil
+import zipfile
+import logging
+import tempfile
+import bcf.v3.data
+from datetime import datetime
+from xml.dom import minidom
+from xmlschema import XMLSchema
+from contextlib import contextmanager
+from shutil import copyfile
+
+cwd = os.path.dirname(os.path.realpath(__file__))
+
+
+@contextmanager
+def cd(newdir):
+    prevdir = os.getcwd()
+    os.chdir(os.path.expanduser(newdir))
+    try:
+        yield
+    finally:
+        os.chdir(prevdir)
+
+
+class BcfXml:
+    def __init__(self):
+        self.filepath = None
+        self.logger = logging.getLogger("bcfxml")
+        self.author = "john@doe.com"
+        self.project = bcf.v3.data.Project()
+        self.version = "3.0"
+        self.topics = {}
+
+    def new_project(self):
+        self.project.project_id = str(uuid.uuid4())
+        self.project.name = "New Project"
+        self.topics = {}
+        if self.filepath:
+            self.close_project()
+        self.filepath = tempfile.mkdtemp()
+        self.edit_project()
+        self.edit_version()
+
+    def get_project(self, filepath=None):
+        if os.path.isfile(os.path.join(self.filepath, "project.bcfp")):
+            data = self._read_xml("project.bcfp", "project.xsd")
+            self.project.project_id = data["Project"]["@ProjectId"]
+            self.project.name = data["Project"].get("Name")
+        return self.project
+
+    def edit_project(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "ProjectInfo")
+        project = self._create_element(root, "Project", {"ProjectId": self.project.project_id})
+        if self.project.name:
+            self._create_element(project, "Name", text=self.project.name)
+        with open(os.path.join(self.filepath, "project.bcfp"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def save_project(self, filepath):
+        with cd(self.filepath):
+            zip_file = zipfile.ZipFile(filepath, "w", zipfile.ZIP_DEFLATED)
+            for root, dirs, files in os.walk("./"):
+                for file in files:
+                    zip_file.write(os.path.join(root, file))
+            zip_file.close()
+
+    def get_version(self):
+        data = self._read_xml("bcf.version", "version.xsd")
+        self.version = data["@VersionId"]
+        return self.version
+
+    def edit_version(self):
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Version", {"VersionId": self.version})
+        with open(os.path.join(self.filepath, "bcf.version"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def get_topics(self):
+        self.topics = {}
+        topics = []
+        subdirs = []
+        for (dirpath, dirnames, filenames) in os.walk(self.filepath):
+            subdirs = dirnames
+            break
+        for subdir in subdirs:
+            try:
+                uuid.UUID(subdir)
+            except ValueError:
+                continue
+            if not os.path.exists(os.path.join(self.filepath, subdir, "markup.bcf")):
+                continue
+            self.topics[subdir] = self.get_topic(subdir)
+        return self.topics
+
+    def get_header(self, guid):
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Header" not in data:
+            return
+        header = bcf.v3.data.Header()
+        if data["Header"].get("Files"):
+            for item in data["Header"]["Files"].get("File", []):
+                header_file = bcf.v3.data.HeaderFile()
+                optional_keys = {
+                    "filename": "Filename",
+                    "date": "Date",
+                    "reference": "Reference",
+                    "ifc_project": "@IfcProject",
+                    "ifc_spatial_structure_element": "@IfcSpatialStructureElement",
+                    "is_external": "@IsExternal",
+                }
+                for key, value in optional_keys.items():
+                    if value in item:
+                        setattr(header_file, key, item[value])
+                header.files.append(header_file)
+            self.topics[guid].header = header
+            return header
+
+    def get_topic(self, guid):
+        if guid in self.topics:
+            return self.topics[guid]
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        topic = bcf.v3.data.Topic()
+        self.topics[guid] = topic
+
+        mandatory_keys = {
+            "guid": "@Guid",
+            "title": "Title",
+            "creation_date": "CreationDate",
+            "creation_author": "CreationAuthor",
+            "topic_status": "@TopicStatus",
+            "topic_type": "@TopicType",
+        }
+        for key, value in mandatory_keys.items():
+            setattr(topic, key, data["Topic"][value])
+
+        optional_keys = {
+            "priority": "Priority",
+            "index": "Index",
+            "modified_date": "ModifiedDate",
+            "modified_author": "ModifiedAuthor",
+            "due_date": "DueDate",
+            "assigned_to": "AssignedTo",
+            "stage": "Stage",
+            "description": "Description",
+            "server_assigned_id": "@ServerAssignedId",
+        }
+        for key, value in optional_keys.items():
+            if value in data["Topic"]:
+                setattr(topic, key, data["Topic"][value])
+
+        if data["Topic"].get("ReferenceLinks"):
+            topic.reference_links.extend(data["Topic"]["ReferenceLinks"].get("ReferenceLink", []))
+
+        if data["Topic"].get("Labels"):
+            topic.labels.extend(data["Topic"]["Labels"].get("Label", []))
+
+        if "BimSnippet" in data["Topic"]:
+            bim_snippet = bcf.v3.data.BimSnippet()
+            keys = {
+                "snippet_type": "@SnippetType",
+                "is_external": "@IsExternal",
+                "reference": "Reference",
+                "reference_schema": "ReferenceSchema",
+            }
+            for key, value in keys.items():
+                if value in data["Topic"]["BimSnippet"]:
+                    setattr(bim_snippet, key, data["Topic"]["BimSnippet"][value])
+            topic.bim_snippet = bim_snippet
+
+        if data["Topic"].get("DocumentReferences"):
+            for item in data["Topic"]["DocumentReferences"].get("DocumentReference", []):
+                document_reference = bcf.v3.data.DocumentReference()
+                keys = {
+                    "document_guid": "DocumentGuid",
+                    "url": "Url",
+                    "guid": "@Guid",
+                    "description": "Description",
+                }
+                for key, value in keys.items():
+                    if value in item:
+                        setattr(document_reference, key, item[value])
+                topic.document_references.append(document_reference)
+
+        if data["Topic"].get("RelatedTopics"):
+            for item in data["Topic"]["RelatedTopics"].get("RelatedTopic", []):
+                related_topic = bcf.v3.data.RelatedTopic()
+                related_topic.guid = item["@Guid"]
+                topic.related_topics.append(related_topic)
+        return topic
+
+    def add_topic(self, topic=None):
+        if topic is None:
+            topic = bcf.v3.data.Topic()
+        if not topic.guid:
+            topic.guid = str(uuid.uuid4())
+        if not topic.title:
+            topic.title = "New Topic"
+        os.mkdir(os.path.join(self.filepath, topic.guid))
+        self.edit_topic(topic)
+        return topic
+
+    def edit_topic(self, topic):
+        if not topic.creation_date:
+            topic.creation_date = datetime.utcnow().isoformat()
+            topic.creation_author = self.author
+        else:
+            topic.modified_date = datetime.utcnow().isoformat()
+            topic.modified_author = self.author
+
+        self.document = minidom.Document()
+        root = self._create_element(self.document, "Markup")
+        if topic.header:
+            self.write_header(topic.header, root)
+
+        topic_el = self._create_element(
+            root,
+            "Topic",
+            {
+                "Guid": topic.guid,
+                "ServerAssignedId": topic.server_assigned_id,
+                "TopicType": topic.topic_type,
+                "TopicStatus": topic.topic_status,
+            },
+        )
+        if topic.reference_links:
+            reference_Links_el = self._create_element(topic_el, "ReferenceLinks")
+            for reference_link in topic.reference_links:
+                self._create_element(reference_Links_el, "ReferenceLink", text=reference_link)
+
+        text_map = {
+            "Title": topic.title,
+            "Priority": topic.priority,
+            "Index": topic.index,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+        if topic.labels:
+            label_el = self._create_element(topic_el, "Labels")
+            for label in topic.labels:
+                self._create_element(label_el, "Label", text=label)
+
+        text_map = {
+            "CreationDate": topic.creation_date,
+            "CreationAuthor": topic.creation_author,
+            "ModifiedDate": topic.modified_date,
+            "ModifiedAuthor": topic.modified_author,
+            "DueDate": topic.due_date,
+            "AssignedTo": topic.assigned_to,
+            "Stage": topic.stage,
+            "Description": topic.description,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(topic_el, key, text=value)
+
+        if topic.bim_snippet:
+            bim_snippet = self._create_element(
+                topic_el,
+                "BimSnippet",
+                {
+                    "SnippetType": topic.bim_snippet.snippet_type,
+                    "IsExternal": topic.bim_snippet.is_external,
+                },
+            )
+            self._create_element(bim_snippet, "Reference", text=topic.bim_snippet.reference)
+            self._create_element(
+                bim_snippet,
+                "ReferenceSchema",
+                text=topic.bim_snippet.reference_schema,
+            )
+        if topic.document_references:
+            reference_el = self._create_element(topic_el, "DocumentReferences")
+            self.write_document_references(topic.document_references, reference_el)
+        if topic.related_topics:
+            related_topic_el = self._create_element(topic_el, "RelatedTopics")
+            for related_topic in topic.related_topics:
+                self._create_element(related_topic_el, "RelatedTopic", {"Guid": related_topic.guid})
+        if topic.comments:
+            comment_el = self._create_element(topic_el, "Comments")
+            self.write_comments(topic.comments, comment_el)
+        if topic.viewpoints:
+            viewpoint_el = self._create_element(topic_el, "Viewpoints")
+            self.write_viewpoints(topic.viewpoints, viewpoint_el, topic)
+        with open(os.path.join(self.filepath, topic.guid, "markup.bcf"), "wb") as f:
+            f.write(self.document.toprettyxml(encoding="utf-8"))
+
+    def write_document_references(self, references, root):
+        for reference in references:
+            document_reference_el = self._create_element(root, "DocumentReference", {"Guid": reference.guid})
+            if reference.document_guid:
+                self._create_element(document_reference_el, "DocumentGuid", text=reference.document_guid)
+            elif reference.url:
+                self._create_element(document_reference_el, "Url", text=reference.url)
+            if reference.description:
+                self._create_element(document_reference_el, "Description", text=reference.description)
+
+    def write_header(self, header, root):
+        if not header or not header.files:
+            return
+        header_el = self._create_element(root, "Header")
+        files_el = self._create_element(header_el, "Files")
+        for f in header.files:
+            file_el = self._create_element(
+                files_el,
+                "File",
+                {
+                    "IfcProject": f.ifc_project,
+                    "IfcSpatialStructureElement": f.ifc_spatial_structure_element,
+                    "IsExternal": f.is_external,
+                },
+            )
+            if f.filename:
+                self._create_element(file_el, "Filename", text=f.filename)
+            if f.date:
+                self._create_element(file_el, "Date", text=f.date)
+            if f.reference:
+                self._create_element(file_el, "Reference", text=f.reference)
+
+    def write_comments(self, comments, root):
+        for comment in comments.values():
+            comment_el = self._create_element(root, "Comment", {"Guid": comment.guid})
+            text_map = {
+                "Date": comment.date,
+                "Author": comment.author,
+                "Comment": comment.comment,
+                "ModifiedDate": comment.modified_date,
+                "ModifiedAuthor": comment.modified_author,
+            }
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(comment_el, key, text=value)
+            if comment.viewpoint:
+                self._create_element(comment_el, "Viewpoint", {"Guid": comment.viewpoint.guid})
+
+    def add_comment(self, topic, comment=None):
+        if comment is None:
+            comment = bcf.v3.data.Comment()
+        if not comment.guid:
+            comment.guid = str(uuid.uuid4())
+        if not comment.comment:
+            comment.comment = "'Free software' is a matter of liberty, not price. To understand the concept, you should think of 'free' as in 'free speech,' not as in 'free beer'."
+        topic.comments[comment.guid] = comment
+        self.edit_comment(comment, topic)
+
+    def edit_comment(self, comment, topic):
+        if not comment.date:
+            comment.date = datetime.utcnow().isoformat()
+            comment.author = self.author
+        else:
+            comment.modified_date = datetime.utcnow().isoformat()
+            comment.modified_author = self.author
+        self.edit_topic(topic)
+
+    def delete_comment(self, guid, topic):
+        if guid in topic.comments:
+            del topic.comments[guid]
+        self.edit_topic(topic)
+
+    def delete_topic(self, guid):
+        if guid in self.topics:
+            del self.topics[guid]
+        shutil.rmtree(os.path.join(self.filepath, guid))
+
+    def write_viewpoints(self, viewpoints, root, topic):
+        for viewpoint in viewpoints.values():
+            viewpoint_el = self._create_element(root, "ViewPoint", {"Guid": viewpoint.guid})
+            text_map = {
+                "Viewpoint": viewpoint.viewpoint,
+                "Snapshot": viewpoint.snapshot,
+                "Index": viewpoint.index,
+            }
+            for key, value in text_map.items():
+                if value:
+                    self._create_element(viewpoint_el, key, text=value)
+            self.write_viewpoint(viewpoint, topic)
+
+    def write_viewpoint(self, viewpoint, topic):
+        document = minidom.Document()
+        root = self._create_element(document, "VisualizationInfo", {"Guid": viewpoint.guid})
+        self.write_viewpoint_components(viewpoint, root)
+        self.write_viewpoint_orthogonal_camera(viewpoint, root)
+        self.write_viewpoint_perspective_camera(viewpoint, root)
+        self.write_viewpoint_lines(viewpoint, root)
+        self.write_viewpoint_clipping_planes(viewpoint, root)
+        self.write_viewpoint_bitmaps(viewpoint, root)
+        with open(os.path.join(self.filepath, topic.guid, viewpoint.viewpoint), "wb") as f:
+            f.write(document.toprettyxml(encoding="utf-8"))
+
+    def write_viewpoint_components(self, viewpoint, parent):
+        if not viewpoint.components:
+            return
+        components_el = self._create_element(parent, "Components")
+        if viewpoint.components.selection:
+            selection_el = self._create_element(components_el, "Selection")
+            for selection in viewpoint.components.selection:
+                self.write_component(selection, selection_el)
+        if viewpoint.components.visibility:
+            visibility = self._create_element(
+                components_el,
+                "Visibility",
+                {"DefaultVisibility": viewpoint.components.visibility.default_visibility},
+            )
+            if viewpoint.components.visibility.view_setup_hints:
+                view_setup_hints = self._create_element(
+                    visibility,
+                    "ViewSetupHints",
+                    {
+                        "SpacesVisible": viewpoint.components.visibility.view_setup_hints.spaces_visible,
+                        "SpaceBoundariesVisible": viewpoint.components.visibility.view_setup_hints.space_boundaries_visible,
+                        "OpeningsVisible": viewpoint.components.visibility.view_setup_hints.openings_visible,
+                    },
+                )
+            if viewpoint.components.visibility.exceptions:
+                exceptions_el = self._create_element(visibility, "Exceptions")
+                for exception in viewpoint.components.visibility.exceptions:
+                    self.write_component(exception, exceptions_el)
+        if viewpoint.components.coloring:
+            coloring_el = self._create_element(components_el, "Coloring")
+            for color in viewpoint.components.coloring:
+                color_el = self._create_element(coloring_el, "Color", {"Color": color.color})
+                component_el = self._create_element(color_el, "Components")
+                for component in color.components:
+                    self.write_component(component, component_el)
+
+    def write_viewpoint_orthogonal_camera(self, viewpoint, parent):
+        if not viewpoint.orthogonal_camera:
+            return
+        camera = viewpoint.orthogonal_camera
+        camera_el = self._create_element(parent, "OrthogonalCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "ViewToWorldScale", text=camera.view_to_world_scale)
+        self._create_element(camera_el, "AspectRatio", text=camera.aspect_ratio)
+
+    def write_viewpoint_perspective_camera(self, viewpoint, parent):
+        if not viewpoint.perspective_camera:
+            return
+        camera = viewpoint.perspective_camera
+        camera_el = self._create_element(parent, "PerspectiveCamera")
+        camera_view_point = self._create_element(camera_el, "CameraViewPoint")
+        self.write_vector(camera_view_point, camera.camera_view_point)
+        camera_direction = self._create_element(camera_el, "CameraDirection")
+        self.write_vector(camera_direction, camera.camera_direction)
+        camera_up_vector = self._create_element(camera_el, "CameraUpVector")
+        self.write_vector(camera_up_vector, camera.camera_up_vector)
+        self._create_element(camera_el, "FieldOfView", text=camera.field_of_view)
+        self._create_element(camera_el, "AspectRatio", text=camera.aspect_ratio)
+
+    def write_viewpoint_lines(self, viewpoint, parent):
+        if not viewpoint.lines:
+            return
+        lines_el = self._create_element(parent, "Lines")
+        for line in viewpoint.lines:
+            line_el = self._create_element(lines_el, "Line")
+            start_point_el = self._create_element(line_el, "StartPoint")
+            self.write_vector(start_point_el, line.start_point)
+            end_point_el = self._create_element(line_el, "EndPoint")
+            self.write_vector(end_point_el, line.end_point)
+
+    def write_viewpoint_clipping_planes(self, viewpoint, parent):
+        if not viewpoint.clipping_planes:
+            return
+        planes_el = self._create_element(parent, "ClippingPlanes")
+        for plane in viewpoint.clipping_planes:
+            plane_el = self._create_element(planes_el, "ClippingPlane")
+            location_el = self._create_element(plane_el, "Location")
+            self.write_vector(location_el, plane.location)
+            direction_el = self._create_element(plane_el, "Direction")
+            self.write_vector(direction_el, plane.direction)
+
+    def write_viewpoint_bitmaps(self, viewpoint, parent):
+        if not viewpoint.bitmaps:
+            return
+        bitmaps_el = self._create_element(parent, "Bitmaps")
+        for bitmap in viewpoint.bitmaps:
+            bitmap_el = self._create_element(bitmaps_el, "Bitmap")
+
+            text_map = {"Format": bitmap.bitmap_format, "Reference": bitmap.reference}
+            for key, value in text_map.items():
+                self._create_element(bitmap_el, key, text=value)
+
+            location_el = self._create_element(bitmap_el, "Location")
+            self.write_vector(location_el, bitmap.location)
+            normal_el = self._create_element(bitmap_el, "Normal")
+            self.write_vector(normal_el, bitmap.normal)
+            up_el = self._create_element(bitmap_el, "Up")
+            self.write_vector(up_el, bitmap.up)
+
+            self._create_element(bitmap_el, "Height", text=bitmap.height)
+
+    def write_vector(self, parent, from_obj):
+        self._create_element(parent, "X", text=from_obj.x)
+        self._create_element(parent, "Y", text=from_obj.y)
+        self._create_element(parent, "Z", text=from_obj.z)
+
+    def write_component(self, data, parent):
+        component_el = self._create_element(parent, "Component", {"IfcGuid": data.ifc_guid})
+        text_map = {
+            "OriginatingSystem": data.originating_system,
+            "AuthoringToolId": data.authoring_tool_id,
+        }
+        for key, value in text_map.items():
+            if value:
+                self._create_element(component_el, key, text=value)
+
+    def add_viewpoint(self, topic, viewpoint=None):
+        if not viewpoint:
+            viewpoint = bcf.v3.data.Viewpoint()
+        if not viewpoint.guid:
+            viewpoint.guid = str(uuid.uuid4())
+        if not viewpoint.viewpoint:
+            viewpoint.viewpoint = f"{viewpoint.guid}.bcfv"
+        if viewpoint.snapshot:
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filepath = os.path.join(topic_filepath, viewpoint.snapshot)
+            if not os.path.exists(filepath):
+                filename = viewpoint.guid + os.path.splitext(viewpoint.snapshot)[-1]
+                copyfile(viewpoint.snapshot, os.path.join(topic_filepath, filename))
+                viewpoint.snapshot = filename
+        topic.viewpoints[viewpoint.guid] = viewpoint
+        self.edit_topic(topic)
+
+    def delete_viewpoint(self, guid, topic):
+        if guid not in topic.viewpoints:
+            return
+        viewpoint = topic.viewpoints[guid]
+        if viewpoint.snapshot:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.snapshot)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        if viewpoint.viewpoint:
+            filepath = os.path.join(self.filepath, topic.guid, viewpoint.viewpoint)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        for bitmap in viewpoint.bitmaps:
+            if not bitmap.reference:
+                continue
+            filepath = os.path.join(self.filepath, topic.guid, bitmap.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.viewpoints[guid]
+        self.edit_topic(topic)
+
+    def delete_file(self, topic, index):
+        if not topic.header:
+            return
+        f = topic.header.files.pop(index)
+        filepath = os.path.join(self.filepath, topic.guid, f.reference)
+        if not f.is_external and os.path.exists(filepath):
+            os.remove(filepath)
+        self.edit_topic(topic)
+
+    def delete_bim_snippet(self, topic):
+        if not topic.bim_snippet:
+            return
+        if topic.bim_snippet.reference and not topic.bim_snippet.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, topic.bim_snippet.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        topic.bim_snippet = None
+        self.edit_topic(topic)
+
+    def delete_document_reference(self, topic, index):
+        document_reference = topic.document_references[index]
+        if document_reference.referenced_document and not document_reference.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, document_reference.referenced_document)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        del topic.document_references[index]
+        self.edit_topic(topic)
+
+    def add_document_reference(self, topic, document_reference):
+        if os.path.exists(document_reference.referenced_document):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(document_reference.referenced_document)
+            copyfile(
+                document_reference.referenced_document,
+                os.path.join(topic_filepath, filename),
+            )
+            document_reference.referenced_document = filename
+            document_reference.is_external = False
+        else:
+            document_reference.is_external = True
+        if not document_reference.guid:
+            document_reference.guid = str(uuid.uuid4())
+        topic.document_references.append(document_reference)
+        self.edit_topic(topic)
+
+    def add_bim_snippet(self, topic, bim_snippet):
+        if topic.bim_snippet:
+            self.delete_bim_snippet(topic)
+        if os.path.exists(bim_snippet.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            filename = os.path.basename(bim_snippet.reference)
+            copyfile(bim_snippet.reference, os.path.join(topic_filepath, filename))
+            bim_snippet.reference = filename
+            bim_snippet.is_external = False
+        else:
+            bim_snippet.is_external = True
+        topic.bim_snippet = bim_snippet
+        self.edit_topic(topic)
+
+    def add_file(self, topic, header_file):
+        if os.path.exists(header_file.reference):
+            topic_filepath = os.path.join(self.filepath, topic.guid)
+            header_file.filename = os.path.basename(header_file.reference)
+            copyfile(
+                header_file.reference,
+                os.path.join(topic_filepath, header_file.filename),
+            )
+            header_file.reference = header_file.filename
+            header_file.is_external = False
+        header_file.date = datetime.utcnow().isoformat()
+        if not topic.header:
+            topic.header = bcf.v3.data.Header()
+        topic.header.files.append(header_file)
+        self.edit_topic(topic)
+
+    def get_comments(self, guid):
+        comments = {}
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Comments" not in data["Topics"]:
+            return comments
+
+        for item in data["Topic"]["Comments"].get("Comment", []):
+            comment = bcf.v3.data.Comment()
+            mandatory_keys = {
+                "guid": "@Guid",
+                "date": "Date",
+                "author": "Author",
+            }
+            for key, value in mandatory_keys.items():
+                setattr(comment, key, item[value])
+            optional_keys = {
+                "comment": "Comment",
+                "modified_date": "ModifiedDate",
+                "modified_author": "ModifiedAuthor",
+            }
+            for key, value in optional_keys.items():
+                if value in item:
+                    setattr(comment, key, item[value])
+            if "Viewpoint" in item:
+                viewpoint = bcf.v3.data.Viewpoint()
+                viewpoint.guid = item["Viewpoint"]["@Guid"]
+                comment.viewpoint = viewpoint
+            comments[comment.guid] = comment
+        self.topics[guid].comments = comments
+        return comments
+
+    def get_viewpoints(self, guid):
+        viewpoints = {}
+        data = self._read_xml(os.path.join(guid, "markup.bcf"), "markup.xsd")
+        if "Viewpoints" not in data["Topic"]:
+            return viewpoints
+        for item in data["Topic"]["Viewpoints"]:
+            viewpoint = self.get_viewpoint(item, guid)
+            viewpoints[viewpoint.guid] = viewpoint
+        self.topics[guid].viewpoints = viewpoints
+        return viewpoints
+
+    def get_viewpoint(self, data, topic_guid):
+        viewpoint = bcf.v3.data.Viewpoint()
+        viewpoint.guid = data["@Guid"]
+        optional_keys = {
+            "viewpoint": "Viewpoint",
+            "snapshot": "Snapshot",
+            "index": "Index",
+        }
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(viewpoint, key, data[value])
+        visinfo = self._read_xml(os.path.join(topic_guid, viewpoint.viewpoint), "visinfo.xsd")
+        viewpoint.components = self.get_viewpoint_components(visinfo)
+        viewpoint.orthogonal_camera = self.get_viewpoint_orthogonal_camera(visinfo)
+        viewpoint.perspective_camera = self.get_viewpoint_perspective_camera(visinfo)
+        viewpoint.lines = self.get_viewpoint_lines(visinfo)
+        viewpoint.clipping_planes = self.get_viewpoint_clipping_planes(visinfo)
+        viewpoint.bitmaps = self.get_viewpoint_bitmaps(visinfo)
+        return viewpoint
+
+    def get_viewpoint_components(self, visinfo):
+        if "Components" not in visinfo:
+            return None
+        components = bcf.v3.data.Components()
+        data = visinfo["Components"]
+        if "Selection" in data and "Component" in data["Selection"]:
+            for item in data["Selection"].get("Component", []):
+                components.selection.append(self.get_component(item))
+        if "Visibility" in data:
+            component_visibility = bcf.v3.data.ComponentVisibility()
+            if "@DefaultVisibility" in data["Visibility"]:
+                component_visibility.default_visibility = data["Visibility"]["@DefaultVisibility"]
+            if "Exceptions" in data["Visibility"] and "Component" in data["Visibility"]["Exceptions"]:
+                for item in data["Visibility"]["Exceptions"]["Component"]:
+                    component_visibility.exceptions.append(self.get_component(item))
+            if "ViewSetupHints" in data["Visibility"]:
+                view_setup_hints = bcf.v3.data.ViewSetupHints()
+                optional_keys = {
+                    "spaces_visible": "@SpacesVisible",
+                    "space_boundaries_visible": "@SpaceBoundariesVisible",
+                    "openings_visible": "@OpeningsVisible",
+                }
+                for key, value in optional_keys.items():
+                    if value in data["Visibility"]["ViewSetupHints"]:
+                        setattr(view_setup_hints, key, data["Visibility"]["ViewSetupHints"][value])
+                component_visibility.view_setup_hints = view_setup_hints
+            components.visibility = component_visibility
+        if "Coloring" in data and "Color" in data["Coloring"]:
+            for item in data["Coloring"]["Color"]:
+                color = bcf.v3.data.Color()
+                color.color = item["@Color"]
+                for item2 in item["Components"]["Component"]:
+                    color.components.append(self.get_component(item2))
+                components.coloring.append(color)
+        return components
+
+    def get_viewpoint_orthogonal_camera(self, visinfo):
+        if "OrthogonalCamera" not in visinfo:
+            return None
+        camera = bcf.v3.data.OrthogonalCamera()
+        data = visinfo["OrthogonalCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.view_to_world_scale = data["ViewToWorldScale"]
+        camera.aspect_ratio = data["AspectRatio"]
+        return camera
+
+    def get_viewpoint_perspective_camera(self, visinfo):
+        if "PerspectiveCamera" not in visinfo:
+            return None
+        camera = bcf.v3.data.PerspectiveCamera()
+        data = visinfo["PerspectiveCamera"]
+        self.set_vector(camera.camera_view_point, data["CameraViewPoint"])
+        self.set_vector(camera.camera_direction, data["CameraDirection"])
+        self.set_vector(camera.camera_up_vector, data["CameraUpVector"])
+        camera.field_of_view = data["FieldOfView"]
+        camera.aspect_ratio = data["AspectRatio"]
+        return camera
+
+    def get_viewpoint_lines(self, visinfo):
+        if "Lines" not in visinfo:
+            return []
+        lines = []
+        for item in visinfo["Lines"].get("Line", []):
+            line = bcf.v3.data.Line()
+            self.set_vector(line.start_point, item["StartPoint"])
+            self.set_vector(line.end_point, item["EndPoint"])
+            lines.append(line)
+        return lines
+
+    def get_viewpoint_clipping_planes(self, visinfo):
+        if "ClippingPlanes" not in visinfo:
+            return []
+        planes = []
+        for item in visinfo["ClippingPlanes"]["ClippingPlane"]:
+            plane = bcf.v3.data.ClippingPlane()
+            self.set_vector(plane.location, item["Location"])
+            self.set_vector(plane.direction, item["Direction"])
+            planes.append(plane)
+        return planes
+
+    def get_viewpoint_bitmaps(self, visinfo):
+        if "Bitmaps" not in visinfo:
+            return []
+        bitmaps = []
+        for item in visinfo["Bitmaps"].get("Bitmap"):
+            bitmap = bcf.v3.data.Bitmap()
+            bitmap.reference = item["Reference"]
+            bitmap.bitmap_format = item["Format"].upper()
+            self.set_vector(bitmap.location, item["Location"])
+            self.set_vector(bitmap.normal, item["Normal"])
+            self.set_vector(bitmap.up, item["Up"])
+            bitmap.height = item["Height"]
+            bitmaps.append(bitmap)
+        return bitmaps
+
+    def set_vector(self, to_obj, from_xml):
+        to_obj.x = from_xml["X"]
+        to_obj.y = from_xml["Y"]
+        to_obj.z = from_xml["Z"]
+
+    def get_component(self, data):
+        component = bcf.v3.data.Component()
+        optional_keys = {
+            "originating_system": "OriginatingSystem",
+            "authoring_tool_id": "AuthoringToolId",
+            "ifc_guid": "@IfcGuid",
+        }
+        for key, value in optional_keys.items():
+            if value in data:
+                setattr(component, key, data[value])
+        return component
+
+    def close_project(self):
+        shutil.rmtree(self.filepath)
+
+    def _read_xml(self, filename, xsd):
+        schema = XMLSchema(os.path.join(cwd, "xsd", xsd))
+        filepath = os.path.join(self.filepath, filename)
+        (data, errors) = schema.to_dict(filepath, validation="lax")
+        for error in errors:
+            self.logger.error(error)
+        return data
+
+    def _create_element(self, parent, name, attributes={}, text=None):
+        element = self.document.createElement(name)
+        for key, value in attributes.items():
+            if isinstance(value, bool):
+                element.setAttribute(key, str(value).lower())
+            elif value:
+                element.setAttribute(key, value)
+        if text is not None:
+            text = self.document.createTextNode(str(text))
+            element.appendChild(text)
+        parent.appendChild(element)
+        return element
+
+    def __del__(self):
+        self.close_project()
@@ -0,0 +1,200 @@
+
+# BCF - BCF Python library
+# Copyright (C) 2021 Prabhat Singh <singh01prabhat@gmail.com>
+#
+# This file is part of BCF.
+#
+# BCF is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BCF is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with BCF.  If not, see <http://www.gnu.org/licenses/>.
+
+class Project:
+    def __init__(self):
+        self.project_id = ""
+        self.name = ""
+
+
+class BimSnippet:
+    def __init__(self):
+        self.snippet_type = None
+        self.is_external = False
+        self.reference = None
+        self.reference_schema = None
+
+
+class DocumentReference:
+    def __init__(self):
+        self.description = None
+        self.document_guid = None
+        self.url = None
+        self.guid = None
+
+
+class RelatedTopic:
+    def __init__(self):
+        self.guid = None
+
+
+class HeaderFile:
+    def __init__(self):
+        self.filename = ""
+        self.date = None
+        self.reference = ""
+        self.ifc_project = None
+        self.ifc_spatial_structure_element = None
+        self.is_external = True
+
+
+class Header:
+    def __init__(self):
+        self.files = []
+
+
+class Topic:
+    def __init__(self):
+        self.reference_links = []
+        self.title = ""
+        self.priority = None
+        self.index = None  # Deprecated, stored, but ignored
+        self.labels = []
+        self.creation_date = None
+        self.creation_author = None
+        self.modified_date = None
+        self.modified_author = None
+        self.due_date = None
+        self.assigned_to = None
+        self.stage = None
+        self.description = None
+        self.bim_snippet = None
+        self.document_references = []
+        self.related_topics = []
+        self.topic_status = None
+        self.topic_type = None
+        self.guid = None
+
+        self.header = None
+        self.comments = {}
+        self.viewpoints = {}
+        self.server_assigned_id = ""
+
+
+class Comment:
+    def __init__(self):
+        self.guid = None
+        self.date = None
+        self.author = ""
+        self.comment = ""
+        self.viewpoint = None
+        self.modified_date = None
+        self.modified_author = ""
+
+
+class ViewSetupHints:
+    def __init__(self):
+        self.spaces_visible = False
+        self.space_boundaries_visible = False
+        self.openings_visible = False
+
+
+class Component:
+    def __init__(self):
+        self.originating_system = None
+        self.authoring_tool_id = None
+        self.ifc_guid = None
+
+
+class ComponentVisibility:
+    def __init__(self):
+        self.exceptions = []
+        self.default_visibility = False
+        self.view_setup_hints = None
+
+
+class Color:
+    def __init__(self):
+        self.color = None
+        self.components = []
+
+
+class Components:
+    def __init__(self):
+
+        self.selection = []
+        self.visibility = None
+        self.coloring = []
+
+
+class Point:
+    def __init__(self):
+        self.x = 0
+        self.y = 0
+        self.z = 0
+
+
+class Direction(Point):
+    pass
+
+
+class OrthogonalCamera:
+    def __init__(self):
+        self.camera_view_point = Point()
+        self.camera_direction = Direction()
+        self.camera_up_vector = Direction()
+        self.view_to_world_scale = 1.0
+        self.aspect_ratio = 1.0
+
+
+class PerspectiveCamera:
+    def __init__(self):
+        self.camera_view_point = Point()
+        self.camera_direction = Direction()
+        self.camera_up_vector = Direction()
+        self.field_of_view = 60.0
+        self.aspect_ratio = 1.0
+
+
+class Line:
+    def __init__(self):
+        self.start_point = Point()
+        self.end_point = Point()
+
+
+class ClippingPlane:
+    def __init__(self):
+        self.location = Point()
+        self.direction = Direction()
+
+
+class Bitmap:
+    def __init__(self):
+        self.reference = ""  # Only in BCF-XML
+        self.bitmap_data = None  # Only in BCF-API
+        self.bitmap_format = "PNG"  # Enum of png or jpg
+        self.location = Point()
+        self.normal = Direction()
+        self.up = Direction()
+        self.height = 1.0
+
+
+class Viewpoint:
+    def __init__(self):
+        self.guid = None
+        self.viewpoint = None
+        self.snapshot = None
+        self.index = None
+
+        self.components = None  # It's not a list, despite the plural name
+        self.orthogonal_camera = None
+        self.perspective_camera = None
+        self.lines = []
+        self.clipping_planes = []
+        self.bitmaps = []
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+
+    <xs:element name="DocumentInfo">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Documents" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Document" type="Document" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Document">
+        <xs:sequence>
+            <!-- Filename of the document with the file extension. Not used to store the file in the BCF -->
+            <xs:element name="Filename" type="NonEmptyOrBlankString"/>
+            <!-- Human readable description of the document -->
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="DocumentAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="DocumentAttributes">
+        <!-- Guid of the document. Must match the filename in the BCF -->
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:attributeGroup>
+</xs:schema>
@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+
+    <xs:element name="Extensions">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="TopicTypes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicType" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="TopicStatuses" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicStatus" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Priorities" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Priority" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="TopicLabels" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="TopicLabel" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Users" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="User" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="SnippetTypes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="SnippetType" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Stages" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Stage" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+</xs:schema>
@@ -0,0 +1,174 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="Markup">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Header" type="Header" minOccurs="0"/>
+                <xs:element name="Topic" type="Topic"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Header">
+        <xs:sequence>
+            <xs:element name="Files" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="File" type="File" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <!-- ISG Jira issue BCF-9. Add support for several viewpoints and snapshots per issue -->
+    <xs:complexType name="ViewPoint">
+        <xs:sequence>
+            <!-- viewpoint file (xml) -->
+            <xs:element name="Viewpoint" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- the snapshot png -->
+            <xs:element name="Snapshot" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- the viewpoint index (sort order) -->
+            <xs:element name="Index" type="xs:int" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+        <!-- Guid of the viewpoint -->
+    </xs:complexType>
+    <!-- BimSnippet -->
+    <xs:complexType name="BimSnippet">
+        <xs:sequence>
+            <!--
+        Name of the file in the topic folder containing the snippet or a URL.
+         E.G.- Expresscode containing p.e Issue, Request
+        // Maybe some header infos ?? // IfcEntites // Geometry 
+         -->
+            <!-- Reference (name) to the snippet file -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString"/>
+            <xs:element name="ReferenceSchema" type="NonEmptyOrBlankString"/>
+        </xs:sequence>
+        <xs:attribute name="SnippetType" type="NonEmptyOrBlankString" use="required"/>
+        <xs:attribute name="IsExternal" type="xs:boolean" default="false"/>
+        <!-- This flag is true when the reference is a URL pointing outside of the BCF file-->
+    </xs:complexType>
+    <xs:complexType name="Topic">
+        <xs:sequence>
+            <xs:element name="ReferenceLinks" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="ReferenceLink" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="Title" type="NonEmptyOrBlankString"/>
+            <xs:element name="Priority" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <!-- ISG Jira issue BCF-8 Add a way save order the topics -->
+            <!-- This property is deprecated and will be removed in a future release -->
+            <xs:element name="Index" type="xs:int" minOccurs="0"/>
+            <xs:element name="Labels" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Label" type="NonEmptyOrBlankString" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="CreationDate" type="xs:dateTime"/>
+            <xs:element name="CreationAuthor" type="NonEmptyOrBlankString"/>
+            <xs:element name="ModifiedDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="ModifiedAuthor" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="DueDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="AssignedTo" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Stage" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="BimSnippet" type="BimSnippet" minOccurs="0"/>
+            <xs:element name="DocumentReferences" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="DocumentReference" type="DocumentReference" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="RelatedTopics" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="RelatedTopic" minOccurs="0" maxOccurs="unbounded">
+                            <xs:complexType>
+                                <xs:attribute name="Guid" type="Guid" use="required"/>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="Comments" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Comment" type="Comment" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+            <!-- ISG Jira issue BCF-9. Add support for several viewpoints and snapshots per issue -->
+            <xs:element name="Viewpoints" minOccurs="0">
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="ViewPoint" type="ViewPoint" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+        <xs:attribute name="ServerAssignedId" type="NonEmptyOrBlankString" use="optional"/>
+        <xs:attribute name="TopicType" type="NonEmptyOrBlankString" use="required"/>
+        <xs:attribute name="TopicStatus" type="NonEmptyOrBlankString" use="required"/>
+    </xs:complexType>
+    <xs:complexType name="File">
+        <xs:sequence>
+            <xs:element name="Filename" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="Date" type="xs:dateTime" minOccurs="0"/>
+            <!-- Reference (URL) of the file -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="FileAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="FileAttributes">
+        <xs:attribute name="IfcProject" type="IfcGuid" use="optional"/>
+        <xs:attribute name="IfcSpatialStructureElement" type="IfcGuid" use="optional"/>
+        <xs:attribute name="IsExternal" type="xs:boolean" default="true"/>
+    </xs:attributeGroup>
+    <!-- Reference to a document inside of the topic folder or a url pointing to the web -->
+    <xs:complexType name="DocumentReference">
+        <xs:sequence>
+            <xs:choice>
+                <!-- Guid of the document: If pointing to an internal document -->
+                <xs:element name="DocumentGuid" type="Guid" minOccurs="0"/>
+                <!-- Url of the reference. If pointing to an external document -->
+                <xs:element name="Url" type="NonEmptyOrBlankString" minOccurs="0"/>
+            </xs:choice>
+            <!-- Human readable description of the document reference -->
+            <xs:element name="Description" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attributeGroup ref="DocumentReferenceAttributes"/>
+    </xs:complexType>
+    <xs:attributeGroup name="DocumentReferenceAttributes">
+        <!-- Guid of the document reference -->
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:attributeGroup>
+    <xs:complexType name="Comment">
+        <xs:sequence>
+            <xs:element name="Date" type="xs:dateTime"/>
+            <xs:element name="Author" type="NonEmptyOrBlankString"/>
+            <xs:element name="Comment" minOccurs="0" type="NonEmptyOrBlankString"/>
+            <xs:element name="Viewpoint" minOccurs="0">
+                <xs:complexType>
+                    <xs:attribute name="Guid" type="Guid" use="required"/>
+                </xs:complexType>
+            </xs:element>
+            <xs:element name="ModifiedDate" type="xs:dateTime" minOccurs="0"/>
+            <xs:element name="ModifiedAuthor" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="Guid" type="Guid" use="required"/>
+    </xs:complexType>
+    <xs:simpleType name="IfcGuid">
+        <xs:restriction base="xs:string">
+            <xs:length value="22"/>
+            <xs:pattern value="[0-9A-Za-z_$]*"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="ProjectInfo">
+        <xs:complexType>
+            <xs:sequence>
+                <xs:element name="Project" type="Project"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="Project">
+        <xs:sequence>
+            <xs:element name="Name" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute name="ProjectId" type="NonEmptyOrBlankString" use="required"/>
+    </xs:complexType>
+</xs:schema>
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:simpleType name="Guid">
+        <xs:restriction base="xs:string">
+            <xs:pattern value="[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:simpleType name="NonEmptyOrBlankString">
+        <xs:restriction base="xs:string">
+            <xs:minLength value="1"/>
+            <xs:whiteSpace value="collapse"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+    <xs:element name="Version">
+        <xs:complexType>
+            <xs:attribute name="VersionId" type="xs:string" use="required"/>
+        </xs:complexType>
+    </xs:element>
+</xs:schema>
@@ -0,0 +1,220 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
+    <xs:include schemaLocation="shared-types.xsd"/>
+    <xs:element name="VisualizationInfo">
+        <xs:annotation>
+            <xs:documentation>VisualizationInfo documentation</xs:documentation>
+        </xs:annotation>
+        <xs:complexType>
+            <xs:sequence>
+                <!--
+                Although plural, 'Components' is not a collection
+                -->
+                <xs:element name="Components" type="Components" minOccurs="0"/>
+                <xs:choice>
+                    <xs:element name="OrthogonalCamera" type="OrthogonalCamera"/>
+                    <xs:element name="PerspectiveCamera" type="PerspectiveCamera"/>
+                </xs:choice>
+                <xs:element name="Lines" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Line" type="Line" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="ClippingPlanes" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="ClippingPlane" type="ClippingPlane" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+                <xs:element name="Bitmaps" minOccurs="0">
+                    <xs:complexType>
+                        <xs:sequence>
+                            <xs:element name="Bitmap" type="Bitmap" minOccurs="0" maxOccurs="unbounded"/>
+                        </xs:sequence>
+                    </xs:complexType>
+                </xs:element>
+            </xs:sequence>
+            <!-- Guid of the viewpoint -->
+            <xs:attribute name="Guid" type="Guid" use="required"/>
+        </xs:complexType>
+    </xs:element>
+    <xs:complexType name="OrthogonalCamera">
+        <xs:sequence>
+            <xs:element name="CameraViewPoint" type="Point"/>
+            <xs:element name="CameraDirection" type="Direction"/>
+            <xs:element name="CameraUpVector" type="Direction"/>
+            <xs:element name="ViewToWorldScale" type="xs:double">
+                <xs:annotation>
+                    <xs:documentation>view's visible vertical size in meters</xs:documentation>
+                </xs:annotation>
+            </xs:element>
+            <xs:element name="AspectRatio" type="PositiveDouble">
+                <xs:annotation>
+                    <xs:documentation>
+                        Proportional relationship between the width and the height of the view (w/h).
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="PerspectiveCamera">
+        <xs:sequence>
+            <xs:element name="CameraViewPoint" type="Point"/>
+            <xs:element name="CameraDirection" type="Direction"/>
+            <xs:element name="CameraUpVector" type="Direction"/>
+            <xs:element name="FieldOfView" type="FieldOfView">
+                <xs:annotation>
+                    <xs:documentation>
+                        Vertical field of view, in degrees.
+                        It is currently limited to a value between 45 and 60 degrees.
+                        This limitation will be dropped in the next release and viewers
+                        should be expect values outside this range in current implementations.
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+            <xs:element name="AspectRatio" type="PositiveDouble">
+                <xs:annotation>
+                    <xs:documentation>
+                        Proportional relationship between the width and the height of the view (w/h).
+                    </xs:documentation>
+                </xs:annotation>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Point">
+        <xs:sequence>
+            <xs:element name="X" type="xs:double"/>
+            <xs:element name="Y" type="xs:double"/>
+            <xs:element name="Z" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Direction">
+        <xs:sequence>
+            <xs:element name="X" type="xs:double"/>
+            <xs:element name="Y" type="xs:double"/>
+            <xs:element name="Z" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:simpleType name="PositiveDouble">
+        <xs:restriction base="xs:double">
+            <xs:minExclusive value="0"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:simpleType name="FieldOfView">
+        <xs:restriction base="xs:double">
+            <xs:minExclusive value="0"/>
+            <xs:maxExclusive value="180"/>
+        </xs:restriction>
+    </xs:simpleType>
+    <xs:complexType name="Components">
+        <xs:sequence>
+            <!-- Components with relevance to the viewpoint. They should be displayed highlighted or selected in a viewer -->
+            <xs:element name="Selection" type="ComponentSelection" minOccurs="0"/>
+            <xs:element name="Visibility" type="ComponentVisibility" minOccurs="0"/>
+            <xs:element name="Coloring" type="ComponentColoring" minOccurs="0"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ComponentSelection">
+        <xs:sequence>
+            <xs:element name="Component" type="Component" minOccurs="0" maxOccurs="unbounded"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ComponentVisibility">
+        <xs:sequence>
+            <xs:element name="ViewSetupHints" type="ViewSetupHints" minOccurs="0"/>
+            <xs:element name="Exceptions" minOccurs="0">
+                <!-- List Components that are different than the DefaultVisibility. E.g. if DefaultVisibility = false then list
+                     Components that should be visible -->
+                <xs:complexType>
+                    <xs:sequence>
+                        <xs:element name="Component" type="Component" minOccurs="0" maxOccurs="unbounded"/>
+                    </xs:sequence>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+        <xs:attribute name="DefaultVisibility" type="xs:boolean" default="false"/>
+    </xs:complexType>
+    <xs:complexType name="ViewSetupHints">
+        <xs:attribute name="SpacesVisible" type="xs:boolean" default="false"/>
+        <xs:attribute name="SpaceBoundariesVisible" type="xs:boolean" default="false"/>
+        <xs:attribute name="OpeningsVisible" type="xs:boolean" default="false"/>
+    </xs:complexType>
+    <xs:complexType name="ComponentColoring">
+        <xs:sequence>
+            <xs:element name="Color" minOccurs="0" maxOccurs="unbounded">
+                <xs:complexType>
+                    <xs:sequence>
+                        <!-- At least one component is required for a Color. -->
+                        <xs:element name="Components">
+                            <xs:complexType>
+                                <xs:sequence>
+                                    <xs:element name="Component" type="Component" maxOccurs="unbounded"/>
+                                </xs:sequence>
+                            </xs:complexType>
+                        </xs:element>
+                    </xs:sequence>
+                    <xs:attribute ref="Color" use="required"/>
+                </xs:complexType>
+            </xs:element>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Component">
+        <xs:sequence>
+            <xs:element name="OriginatingSystem" type="NonEmptyOrBlankString" minOccurs="0"/>
+            <xs:element name="AuthoringToolId" type="NonEmptyOrBlankString" minOccurs="0"/>
+        </xs:sequence>
+        <xs:attribute ref="IfcGuid"/>
+    </xs:complexType>
+    <xs:attribute name="Color">
+        <xs:simpleType>
+            <xs:restriction base="xs:normalizedString">
+                <!-- Should either match 3 or 4 hex bytes , e.g. "FF00FF" or "FF00FF99" -->
+                <xs:pattern value="[0-9A-Fa-f]{6}([0-9A-Fa-f]{2})?"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:attribute>
+    <xs:attribute name="IfcGuid">
+        <xs:simpleType>
+            <xs:restriction base="xs:normalizedString">
+                <xs:length value="22"/>
+                <xs:pattern value="[0-9A-Za-z_$]*"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:attribute>
+    <xs:complexType name="Line">
+        <xs:sequence>
+            <xs:element name="StartPoint" type="Point"/>
+            <xs:element name="EndPoint" type="Point"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="ClippingPlane">
+        <xs:sequence>
+            <xs:element name="Location" type="Point"/>
+            <xs:element name="Direction" type="Direction"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:complexType name="Bitmap">
+        <xs:sequence>
+            <xs:element name="Format" type="BitmapFormat"/>
+            <!-- Name of the bitmap file in the topic folder -->
+            <xs:element name="Reference" type="NonEmptyOrBlankString"/>
+            <!-- Location of the center of the bitmap -->
+            <xs:element name="Location" type="Point"/>
+            <!-- Normal of the bitmap -->
+            <xs:element name="Normal" type="Direction"/>
+            <!-- Upvector of the bitmap -->
+            <xs:element name="Up" type="Direction"/>
+            <!-- Height of the bitmap -->
+            <xs:element name="Height" type="xs:double"/>
+        </xs:sequence>
+    </xs:complexType>
+    <xs:simpleType name="BitmapFormat">
+        <xs:restriction base="xs:string">
+            <xs:enumeration value="png"/>
+            <xs:enumeration value="jpg"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>
@@ -0,0 +1,621 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
@@ -0,0 +1,535 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+VERSION:=`date '+%y%m%d'`
+PYVERSION:=py37
+
+ifeq ($(PYVERSION), py37)
+PYLIBDIR:=python3.7
+PYNUMBER:=37
+endif
+ifeq ($(PYVERSION), py39)
+PYLIBDIR:=python3.9
+PYNUMBER:=39
+endif
+
+ifeq ($(PLATFORM), linux)
+ifeq ($(PYVERSION), py37)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/linux-64/hpp-fcl-1.7.5-py37h5f1835d_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/linux-64/eigenpy-2.6.5-py37h95e2c48_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/linux-64/boost-1.74.0-py37h0379df6_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/30/c0/d0526314971fc661b083ab135747dc68446a3022686da8c16d25fcf6ef07/lxml-4.6.3-cp37-cp37m-manylinux2014_x86_64.whl
+endif
+ifeq ($(PYVERSION), py39)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/linux-64/hpp-fcl-1.7.5-py39hbcdfc36_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/linux-64/eigenpy-2.6.5-py39h5aed9d1_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/linux-64/boost-1.74.0-py39h5472131_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/19/d9/a69c6aff5673554df48120565a14a50eaa41d29ae03b02faa0b023666318/lxml-4.6.3-cp39-cp39-manylinux2014_x86_64.whl
+endif
+ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/linux-64/assimp-5.0.1-hedfc422_6.tar.bz2
+OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.7/download/linux-64/octomap-1.9.7-h4bd325d_0.tar.bz2
+ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/linux-64/zlib-1.2.11-h516909a_1010.tar.bz2
+endif
+
+ifeq ($(PLATFORM), macos)
+ifeq ($(PYVERSION), py37)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/osx-64/hpp-fcl-1.7.5-py37h2d7f23a_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/osx-64/eigenpy-2.6.5-py37h0695097_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/osx-64/boost-1.74.0-py37hd79e0ac_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/1e/3e/f0abc15d5dac50939bccc589aae336d5ead4c72e7ad1039a2e0f3630ea92/lxml-4.6.3-cp37-cp37m-macosx_10_9_x86_64.whl
+endif
+ifeq ($(PYVERSION), py39)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/osx-64/hpp-fcl-1.7.5-py39h1e32b98_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/osx-64/eigenpy-2.6.5-py39h5405915_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/osx-64/boost-1.74.0-py39ha641261_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/b8/74/a71f7ad72e8db54ce899efab84507b801660750cbbfa6a39e6717557d36a/lxml-4.6.3-cp39-cp39-macosx_10_9_x86_64.whl
+endif
+ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/osx-64/assimp-5.0.1-h1224e73_6.tar.bz2
+OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.7/download/osx-64/octomap-1.9.7-h940c156_0.tar.bz2
+ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/osx-64/zlib-1.2.11-h7795811_1010.tar.bz2
+endif
+
+ifeq ($(PLATFORM), win)
+ifeq ($(PYVERSION), py37)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/win-64/hpp-fcl-1.7.5-py37h839d6b1_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/win-64/eigenpy-2.6.5-py37h2c32e34_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/win-64/boost-1.74.0-py37h3b38789_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/9e/5e/171ee9d40a600f565fe691ec5bf7596247ec62cfb2edc00c91afe8ea837b/lxml-4.6.3-cp37-cp37m-win_amd64.whl
+endif
+ifeq ($(PYVERSION), py39)
+HPPFCL_URL:=https://anaconda.org/conda-forge/hpp-fcl/1.7.5/download/win-64/hpp-fcl-1.7.5-py39h2e7c763_0.tar.bz2
+EIGENPY_URL:=https://anaconda.org/conda-forge/eigenpy/2.6.5/download/win-64/eigenpy-2.6.5-py39h3ce40e6_0.tar.bz2
+BOOST_URL:=https://anaconda.org/conda-forge/boost/1.74.0/download/win-64/boost-1.74.0-py39hefe7e4c_3.tar.bz2
+LXML_URL:=https://files.pythonhosted.org/packages/72/d4/426ecb8849c47c3e370c87aa0ac05d85768df917ffea27fcd6686a5e6495/lxml-4.6.3-cp39-cp39-win_amd64.whl
+endif
+ASSIMP_URL:=https://anaconda.org/conda-forge/assimp/5.0.1/download/win-64/assimp-5.0.1-hc2aa0de_6.tar.bz2
+OCTOMAP_URL:=https://anaconda.org/conda-forge/octomap/1.9.7/download/win-64/octomap-1.9.7-h5362a0b_0.tar.bz2
+ZLIB_URL:=https://anaconda.org/conda-forge/zlib/1.2.11/download/win-64/zlib-1.2.11-h62dcd97_1010.tar.bz2
+endif
+
+.PHONY: dist
+dist:
+ifndef PLATFORM
+	$(error PLATFORM is not set)
+endif
+	rm -rf dist
+	mkdir -p dist/working
+	mkdir -p dist/blenderbim
+	cp -r blenderbim/* dist/blenderbim/
+
+	# Provides IfcOpenShell Python functionality
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-$(PYNUMBER)-v0.7.0-b9ea741-$(PLATFORM)64.zip
+	cd dist/working && unzip ifcblender*
+	cp -r dist/working/io_import_scene_ifc/ifcopenshell dist/blenderbim/libs/site/packages/
+
+	# See bug #812
+	cd dist/working && wget https://raw.githubusercontent.com/IfcOpenShell/IfcOpenShell/v0.7.0/src/blenderbim/occ_utils.py
+	cd dist/working && mv occ_utils.py ../blenderbim/libs/site/packages/ifcopenshell/geom/occ_utils.py
+	rm -rf dist/working
+
+	# Provides dependencies that are part of IfcOpenShell
+	mkdir dist/working
+	cd dist/working && wget https://github.com/IfcOpenShell/IfcOpenShell/archive/v0.7.0.zip
+	cd dist/working && unzip v0.7.0.zip
+	# IfcOpenBot sometimes lags behind, so we hotfix the Python utilities
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcopenshell-python/ifcopenshell/util/* dist/blenderbim/libs/site/packages/ifcopenshell/util/
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcopenshell-python/ifcopenshell/api/* dist/blenderbim/libs/site/packages/ifcopenshell/api/
+	cp dist/working/IfcOpenShell-0.7.0/src/ifcopenshell-python/ifcopenshell/entity_instance.py dist/blenderbim/libs/site/packages/ifcopenshell/
+	cp dist/working/IfcOpenShell-0.7.0/src/ifcopenshell-python/ifcopenshell/file.py dist/blenderbim/libs/site/packages/ifcopenshell/
+	# Provides bcf functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/bcf/src/bcf dist/blenderbim/libs/site/packages/
+	# Provides IFCClash functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcclash/ifcclash dist/blenderbim/libs/site/packages/
+	# Provides BIMTester functionality
+	cd dist/working && python -m venv env
+	cd dist/working && . env/bin/activate && pip install pybabel
+	cd dist/working && . env/bin/activate && pip install babel
+	cd dist/working && . env/bin/activate && ./env/bin/pybabel compile -d ./IfcOpenShell-0.7.0/src/ifcbimtester/bimtester/locale/
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcbimtester/bimtester dist/blenderbim/libs/site/packages/
+	# Provides IFCCOBie functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifccobie/* dist/blenderbim/libs/site/packages/
+	# Provides IFCDiff functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcdiff/* dist/blenderbim/libs/site/packages/
+	# Provides IFCCSV functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifccsv/* dist/blenderbim/libs/site/packages/
+	# Provides IFCPatch functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifcpatch/ifcpatch dist/blenderbim/libs/site/packages/
+	# Provides IFC4D functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifc4d/ifc4d dist/blenderbim/libs/site/packages/
+	# Provides IFC5D functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifc5d/ifc5d dist/blenderbim/libs/site/packages/
+	# Provides IFCCityJSON functionality
+	cp -r dist/working/IfcOpenShell-0.7.0/src/ifccityjson dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides Mustache templating in construction documentation
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/d6/fd/eb8c212053addd941cc90baac307c00ac246ac3fce7166b86434c6eae963/pystache-0.5.4.tar.gz
+	cd dist/working && tar -xzvf pystache*
+	cd dist/working/pystache-0.5.4/ && python setup.py build && cp -r build/lib/pystache ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides SVG export in construction documentation
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/79/e8/7eb2ba188eda14a4b47e33b51f3b4978985f4116655c699bcd18c79279b5/svgwrite-1.3.1.zip
+	cd dist/working && unzip svgwrite*
+	cp -r dist/working/svgwrite-1.3.1/svgwrite dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides fuzzy date parsing for construction sequencing
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/be/ed/5bbc91f03fa4c839c4c7360375da77f9659af5f7086b7a7bdda65771c8e0/python-dateutil-2.8.1.tar.gz
+	cd dist/working && tar -xzvf python-dateutil*
+	cp -r dist/working/python-dateutil-2.8.1/dateutil dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides duration parsing for construction sequencing
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/b1/80/fb8c13a4cd38eb5021dc3741a9e588e4d1de88d895c1910c6fc8a08b7a70/isodate-0.6.0.tar.gz
+	cd dist/working && tar -xzvf isodate*
+	cp -r dist/working/isodate-0.6.0/src/isodate dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides networkx graph analysis for project dependency calculations
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/b0/21/adfbf6168631e28577e4af9eb9f26d75fe72b2bb1d33762a5f2c425e6c2a/networkx-2.5.1.tar.gz
+	cd dist/working && tar -xzvf networkx*
+	cp -r dist/working/networkx-2.5.1/networkx dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by networkx
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/4f/51/15a4f6b8154d292e130e5e566c730d8ec6c9802563d58760666f1818ba58/decorator-5.0.9.tar.gz
+	cd dist/working && tar -xzvf decorator*
+	cp -r dist/working/decorator-5.0.9/src/decorator.py dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides jsgantt-improved supports for web-based construction sequencing gantt charts
+	mkdir dist/working
+	cd dist/working && wget https://raw.githubusercontent.com/jsGanttImproved/jsgantt-improved/master/dist/jsgantt.js
+	cd dist/working && wget https://raw.githubusercontent.com/jsGanttImproved/jsgantt-improved/master/dist/jsgantt.css
+	cp dist/working/jsgantt* dist/blenderbim/bim/data/gantt/
+	rm -rf dist/working
+
+	# Required by IFCDiff
+	mkdir dist/working
+	cd dist/working && wget https://github.com/Moult/deepdiff/archive/master.zip
+	cd dist/working && unzip master.zip
+	cp -r dist/working/deepdiff-master/deepdiff dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by deepdiff
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/00/55/ce2cbc6d64034b30cad81a29ba61bdba456f190f5e83c09831304bf68d6b/jsonpickle-1.2.tar.gz
+	cd dist/working && tar -xzvf jsonpickle*
+	cp -r dist/working/jsonpickle-1.2/jsonpickle dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by deepdiff
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/a3/b7/d4d69641cbe707a45c23b190f2d717466ba5accc4c70b5f7a8a450387895/ordered-set-3.1.1.tar.gz
+	cd dist/working && tar -xzvf ordered-set*
+	cp -r dist/working/ordered-set-3.1.1/ordered_set.py dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by lark
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/00/32/8076fa13e832bb4dcff379f18f228e5a53412be0631808b9ca2610c0f566/pyparsing-2.4.5.tar.gz
+	cd dist/working && tar -xzvf pyparsing*
+	cp -r dist/working/pyparsing-2.4.5/pyparsing.py dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by bcf
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/bb/41/ad9ce53bb978b68af8ae415293cafc89b165b8ad55a593725299dca76729/xmlschema-1.1.1.tar.gz
+	cd dist/working && tar -xzvf xmlschema*
+	cp -r dist/working/xmlschema-1.1.1/xmlschema dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by bcf
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/12/f9/f9960222d5274944b01391749e55e4dcdf28d8f0c108b64ac931ceff6fdb/elementpath-1.4.3.tar.gz
+	cd dist/working && tar -xzvf elementpath*
+	cp -r dist/working/elementpath-1.4.3/elementpath dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by bcf
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/21/9f/b251f7f8a76dec1d6651be194dfba8fb8d7781d10ab3987190de8391d08e/six-1.14.0.tar.gz
+	cd dist/working && tar -xzvf six*
+	cp -r dist/working/six-1.14.0/six.py dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFCCSV and ifcopenshell.util.selector
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/18/4d/8d522136c37d9e1ea74062b41b8d5e1318ebf45063ae46ce72ed60af223b/lark-parser-0.8.5.tar.gz
+	cd dist/working && tar -xzvf lark-parser*
+	cp -r dist/working/lark-parser-0.8.5/lark dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFC4D
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/b0/bb/9c4dddd3ca173cb56241cfb2eddfae24690dc676d357ac4cab17d0a36d9d/PyP6Xer-1.13.0.tar.gz
+	cd dist/working && tar -xzvf PyP6Xer*
+	cp -r dist/working/PyP6Xer-1.13.0/xerparser dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by xerparser and IFC4D
+	# TODO: remove this dependency. It's only used to show a progress bar.
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/9f/7b/76c4e5ef1a1b528fcaada4133f972e77d33c252831676cf414119ca6093d/tqdm-4.50.0.tar.gz
+	cd dist/working && tar -xzvf tqdm*
+	cp -r dist/working/tqdm-4.50.0/tqdm dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFCCityJSON
+	mkdir dist/working
+	cd dist/working && python -m venv env
+	cd dist/working && mkdir site-packages
+	cd dist/working && . env/bin/activate && pip install cjio --target=./site-packages
+	cd dist/working/site-packages/ && rm -r *dist-info*
+	cp -r dist/working/site-packages/* dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFCClash
+	mkdir dist/working
+	cd dist/working && wget $(HPPFCL_URL)
+	cd dist/working && tar -xf hpp-fcl*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/$(PYLIBDIR)/site-packages/hppfcl dist/blenderbim/libs/site/packages/
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/$(PYLIBDIR)/site-packages/hppfcl dist/blenderbim/libs/site/packages/
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	cp -r dist/working/Lib/site-packages/hppfcl dist/blenderbim/libs/site/packages/
+	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
+endif
+	rm -rf dist/working
+
+	# Required by hpp-fcl
+	mkdir dist/working
+	cd dist/working && wget $(ASSIMP_URL)
+	cd dist/working && tar -xf assimp*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
+endif
+	rm -rf dist/working
+
+	# Required by hpp-fcl
+	mkdir dist/working
+	cd dist/working && wget $(EIGENPY_URL)
+	cd dist/working && tar -xf eigenpy*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
+endif
+	rm -rf dist/working
+
+	# Required by hpp-fcl
+	mkdir dist/working
+	cd dist/working && wget $(OCTOMAP_URL)
+	cd dist/working && tar -xf octomap*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	# Uh, do nothing, apparently? No DLLs are shipped.
+endif
+	rm -rf dist/working
+
+	# Required by hpp-fcl
+	mkdir dist/working
+	cd dist/working && wget $(BOOST_URL)
+	cd dist/working && tar -xf boost*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
+endif
+	rm -rf dist/working
+
+	# Required by hpp-fcl
+	mkdir dist/working
+	cd dist/working && wget $(ZLIB_URL)
+	cd dist/working && tar -xf zlib*
+ifeq ($(PLATFORM), linux)
+	cp -r dist/working/lib/*.so* dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), macos)
+	cp -r dist/working/lib/*.dylib dist/blenderbim/libs/
+endif
+ifeq ($(PLATFORM), win)
+	cp -r dist/working/Library/bin/*.dll dist/blenderbim/libs/site/packages/hppfcl/
+endif
+	rm -rf dist/working
+
+	# Required by BIMTester
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/c8/4b/d0a8c23b6c8985e5544ea96d27105a273ea22051317f850c2cdbf2029fe4/behave-1.2.6.tar.gz
+	cd dist/working && tar -xzvf behave*
+	cd dist/working/behave-1.2.6/ && cp -r behave ../../blenderbim/libs/site/packages/
+	# See bug #1294
+	cd dist/working/ && wget https://raw.githubusercontent.com/IfcOpenShell/IfcOpenShell/v0.7.0/src/ifcbimtester/patch/model_core.patch
+	cd dist/working/ && wget https://raw.githubusercontent.com/IfcOpenShell/IfcOpenShell/v0.7.0/src/ifcbimtester/patch/runner_util.patch
+	cd dist/working/ && patch ../blenderbim/libs/site/packages/behave/model_core.py < model_core.patch
+	cd dist/working/ && patch ../blenderbim/libs/site/packages/behave/runner_util.py < runner_util.patch
+	rm -rf dist/working
+
+	# Required by ids - uh, not any more, but I'm trying it out in the drawing module
+	mkdir dist/working
+	cd dist/working && wget $(LXML_URL)
+	cd dist/working && cp *.whl lxml.zip && unzip lxml.zip
+	cp -r dist/working/lxml dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by behave
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/f4/65/220bb4075fddb09d5b3ea2c1c1fa66c1c72be9361ec187aab50fa161e576/parse-1.15.0.tar.gz
+	cd dist/working && tar -xzvf parse*
+	cd dist/working/parse-1.15.0/ && cp parse.py ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by behave
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/2e/79/81bebd1b0446d46733db99d74543b4bb80646ef4c988584bae0862e706bc/parse_type-0.5.2.tar.gz
+	cd dist/working && tar -xzvf parse_type*
+	cd dist/working/parse_type-0.5.2/ && cp -r parse_type ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFCCOBie for XLSX support
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/0c/bc/82d6783f83f65f56d8b77d052773c4a2f952fa86385f0cd54e1e006658d7/XlsxWriter-1.2.9.tar.gz
+	cd dist/working && tar -xzvf XlsxWriter*
+	cd dist/working/XlsxWriter-1.2.9/ && cp -r xlsxwriter ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by IFCCOBie for ODS support
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/97/73/8ade73f6749177003f7ce3304f524774adda96e6aaab30ea79fd8fda7934/odfpy-1.4.1.tar.gz
+	cd dist/working && tar -xzvf odfpy*
+	cd dist/working/odfpy-1.4.1/ && cp -r odf ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by odfpy
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/a4/5f/f8aa58ca0cf01cbcee728abc9d88bfeb74e95e6cb4334cfd5bed5673ea77/defusedxml-0.6.0.tar.gz
+	cd dist/working && tar -xzvf defusedxml*
+	cd dist/working/defusedxml-0.6.0/ && cp -r defusedxml ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by augin
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/76/b4/b7baffbda025efd5dc8fcd8d2e953e3aa939c236a484084fa8f4c3588ee9/boto3-1.17.17.tar.gz
+	cd dist/working && tar -xzvf boto3*
+	cd dist/working/boto3-1.17.17/ && cp -r boto3 ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by boto3
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/7f/2e/e02fdfd0f0377c4e44e61de27b05d5cfe93575770661ef9ded80ed90fa88/botocore-1.20.17.tar.gz
+	cd dist/working && tar -xzvf botocore*
+	cd dist/working/botocore-1.20.17/ && cp -r botocore ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by boto3
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/3c/56/3f325b1eef9791759784aa5046a8f6a1aff8f7c898a2e34506771d3b99d8/jmespath-0.10.0.tar.gz
+	cd dist/working && tar -xzvf jmespath*
+	cd dist/working/jmespath-0.10.0/ && cp -r jmespath ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by boto3
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/08/e1/3ee2096ebaeeb8c186d20ed16c8faf4a503913e5c9a0e14cd6b8ffc405a3/s3transfer-0.3.4.tar.gz
+	cd dist/working && tar -xzvf s3transfer*
+	cd dist/working/s3transfer-0.3.4/ && cp -r s3transfer ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides IFCJSON functionality
+	mkdir dist/working
+	cd dist/working && wget https://github.com/IFCJSON-Team/IFC2JSON_python/archive/master.zip
+	cd dist/working && unzip master.zip
+	cp -r dist/working/IFC2JSON_python-master/file_converters/ifcjson dist/blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides OpenLCA fucntionality
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/85/33/f91b96e9e8608ff65a003b692e8a9cdd60f2178f60617e5b1d21334c009c/olca-ipc-0.0.10.tar.gz
+	cd dist/working && tar -xzvf olca-ipc*
+	cd dist/working/olca-ipc-0.0.10/ && cp -r olca ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Provides Brickschema fucntionality
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/ca/37/8309da9a72407d2f5eb5489c197ac3cfe96ee3ccba1902d2a0ecc7843f92/brickschema-0.5.1.tar.gz
+	cd dist/working && tar -xzvf brickschema*
+	# This is an evil hack because we don't want to bundle flask
+	echo "" > dist/working/brickschema-0.5.1/brickschema/web.py
+	cd dist/working/brickschema-0.5.1/ && cp -r brickschema ../../blenderbim/libs/site/packages/
+	# For now lets bundle the latest nightly schema
+	cd dist/working && wget https://github.com/BrickSchema/Brick/releases/download/nightly/Brick.ttl
+	cd dist/working && cp Brick.ttl ../../blenderbim/bim/schema/Brick.ttl
+	rm -rf dist/working
+
+	# Required by brickschema
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/c7/22/37bb938be8e5c20d443b0c9ba0a243573b671b01739efb0a19f81bc5b470/pyshacl-0.17.2.tar.gz
+	cd dist/working && tar -xzvf pyshacl*
+	cd dist/working/pyshacl-0.17.2/ && cp -r pyshacl ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by brickschema
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/d2/a7/be8244688bfcee37c23733ab4fe8e6afa6d4403bd2674a3ae7bd2cecc77b/rdflib-6.0.2.tar.gz
+	cd dist/working && tar -xzvf rdflib*
+	cd dist/working/rdflib-6.0.2/ && cp -r rdflib ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	# Required by brickschema
+	mkdir dist/working
+	cd dist/working && wget https://files.pythonhosted.org/packages/7d/c7/208aece36279e4f1236e437119358786e39530ecc1719d4e1afeddba5288/owlrl-6.0.2.tar.gz
+	cd dist/working && tar -xzvf owlrl*
+	cd dist/working/owlrl-6.0.2/ && cp -r owlrl ../../blenderbim/libs/site/packages/
+	rm -rf dist/working
+
+	cd dist/blenderbim && sed -i "s/999999/$(VERSION)/" __init__.py
+	cd dist && zip -r blenderbim-$(VERSION)-$(PYVERSION)-$(PLATFORM).zip ./*
+	rm -rf dist/blenderbim
+
+.PHONY: test
+test:
+	make test-core
+	make test-tool
+	make test-bim
+
+.PHONY: test-core
+test-core:
+	pytest -p no:pytest-blender test/core
+
+.PHONY: test-bim
+test-bim:
+	pytest test/bim
+
+.PHONY: test-tool
+test-tool:
+	pytest test/tool
+
+.PHONY: qa
+qa:
+	black .
+	pylint ./* --output-format=colorized --disable all --enable E --disable import-error
+
+.PHONY: coverage
+coverage:
+	coverage run --source blenderbim.core -m pytest -p no:pytest-blender test/core
+	coverage html
+	xdg-open htmlcov/index.html
+
+.PHONY: license
+license:
+	copyright-header --license GPL3 --copyright-holder "Dion Moult <dion@thinkmoult.com>" --copyright-year "2022" --copyright-software "BlenderBIM Add-on" --copyright-software-description "OpenBIM Blender Add-on" -a ./ -o ./
+
+.PHONY: clean
+clean:
+	rm -rf dist
+	rm -rf htmlcov
+
+.PHONY: dev
+dev:
+	blender -p setup_pytest.py
@@ -0,0 +1,5 @@
+# BlenderBIM Add-on
+
+An add-on to Blender to allow BIM functionality.
+
+More information on the [BlenderBIM Add-on website](https://blenderbim.org).
@@ -0,0 +1,45 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import sys
+import site
+
+bl_info = {
+    "name": "BlenderBIM",
+    "description": "Author, import, and export data using the Industry Foundation Classes schema",
+    "author": "IfcOpenShell Contributors",
+    "blender": (2, 80, 0),
+    "version": (0, 0, 999999),
+    "location": "File > Export, File > Import, Scene / Object / Material / Mesh Properties",
+    "tracker_url": "https://github.com/IfcOpenShell/IfcOpenShell/issues",
+    "category": "Import-Export",
+}
+
+if sys.modules.get("bpy", None):
+    # Process *.pth in /libs/site/packages to setup globally importable modules
+    # This is 3 levels deep as required by the static RPATH of ../../ from dependencies taken from Anaconda
+    site.addsitedir(os.path.join(os.path.dirname(os.path.realpath(__file__)), "libs", "site", "packages"))
+
+    import blenderbim.bim
+
+    def register():
+        blenderbim.bim.register()
+
+    def unregister():
+        blenderbim.bim.unregister()
@@ -0,0 +1,158 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import importlib
+from . import handler, ui, prop, operator, helper
+
+modules = {
+    "project": None,
+    "search": None,
+    "bcf": None,
+    "root": None,
+    "unit": None,
+    "model": None,
+    "georeference": None,
+    "context": None,
+    "drawing": None,
+    "misc": None,
+    "attribute": None,
+    "type": None,
+    "spatial": None,
+    "void": None,
+    "aggregate": None,
+    "geometry": None,
+    "cobie": None,
+    "resource": None,
+    "cost": None,
+    "sequence": None,
+    "group": None,
+    "system": None,
+    "brick": None,
+    "structural": None,
+    "boundary": None,
+    "profile": None,
+    "material": None,
+    "style": None,
+    "layer": None,
+    "owner": None,
+    "pset": None,
+    "qto": None,
+    "classification": None,
+    "library": None,
+    "constraint": None,
+    "document": None,
+    "pset_template": None,
+    "clash": None,
+    "lca": None,
+    "csv": None,
+    "bimtester": None,
+    "diff": None,
+    "patch": None,
+    "gis": None,
+    "covetool": None,
+    "augin": None,
+    "debug": None,
+}
+
+
+for name in modules.keys():
+    modules[name] = importlib.import_module(f"blenderbim.bim.module.{name}")
+
+
+classes = [
+    operator.OpenUri,
+    operator.SelectDataDir,
+    operator.SelectSchemaDir,
+    operator.SelectIfcFile,
+    operator.OpenUpstream,
+    operator.AddSectionPlane,
+    operator.RemoveSectionPlane,
+    operator.ReloadIfcFile,
+    operator.AddIfcFile,
+    operator.RemoveIfcFile,
+    operator.ConfigureVisibility,
+    prop.StrProperty,
+    prop.ObjProperty,
+    prop.Attribute,
+    prop.ModuleVisibility,
+    prop.BIMProperties,
+    prop.IfcParameter,
+    prop.PsetQto,
+    prop.GlobalId,
+    prop.BIMObjectProperties,
+    prop.BIMMaterialProperties,
+    prop.BIMMeshProperties,
+    ui.BIM_PT_section_plane,
+    ui.BIM_UL_generic,
+    ui.BIM_UL_topics,
+    ui.BIM_ADDON_preferences,
+]
+
+for mod in modules.values():
+    classes.extend(mod.classes)
+
+
+def on_register(scene):
+    handler.setDefaultProperties(scene)
+    bpy.app.handlers.depsgraph_update_post.remove(on_register)
+
+
+def register():
+    for cls in classes:
+        bpy.utils.register_class(cls)
+    bpy.app.handlers.depsgraph_update_post.append(on_register)
+    bpy.app.handlers.undo_pre.append(handler.undo_pre)
+    bpy.app.handlers.undo_post.append(handler.undo_post)
+    bpy.app.handlers.redo_pre.append(handler.redo_pre)
+    bpy.app.handlers.redo_post.append(handler.redo_post)
+    bpy.app.handlers.load_post.append(handler.setDefaultProperties)
+    bpy.app.handlers.load_post.append(handler.loadIfcStore)
+    bpy.app.handlers.save_pre.append(handler.ensureIfcExported)
+    bpy.types.Scene.BIMProperties = bpy.props.PointerProperty(type=prop.BIMProperties)
+    bpy.types.Object.BIMObjectProperties = bpy.props.PointerProperty(type=prop.BIMObjectProperties)
+    bpy.types.Material.BIMObjectProperties = bpy.props.PointerProperty(type=prop.BIMObjectProperties)
+    bpy.types.Material.BIMMaterialProperties = bpy.props.PointerProperty(type=prop.BIMMaterialProperties)
+    bpy.types.Mesh.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
+    bpy.types.Curve.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
+    bpy.types.Camera.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
+    bpy.types.PointLight.BIMMeshProperties = bpy.props.PointerProperty(type=prop.BIMMeshProperties)
+    bpy.types.SCENE_PT_unit.append(ui.ifc_units)
+
+    for mod in modules.values():
+        mod.register()
+
+
+def unregister():
+    for cls in reversed(classes):
+        bpy.utils.unregister_class(cls)
+    bpy.app.handlers.load_post.remove(handler.setDefaultProperties)
+    bpy.app.handlers.load_post.remove(handler.loadIfcStore)
+    bpy.app.handlers.save_pre.remove(handler.ensureIfcExported)
+    del bpy.types.Scene.BIMProperties
+    del bpy.types.Object.BIMObjectProperties
+    del bpy.types.Material.BIMObjectProperties
+    del bpy.types.Material.BIMMaterialProperties
+    del bpy.types.Mesh.BIMMeshProperties
+    del bpy.types.Curve.BIMMeshProperties
+    del bpy.types.Camera.BIMMeshProperties
+    del bpy.types.PointLight.BIMMeshProperties
+    bpy.types.SCENE_PT_unit.remove(ui.ifc_units)
+
+    for mod in reversed(list(modules.values())):
+        mod.unregister()
@@ -0,0 +1,24 @@
+<link href="jsgantt.css" rel="stylesheet" type="text/css"/>
+<script src="jsgantt.js" type="text/javascript"></script>
+<div style="position:relative" class="gantt" id="GanttChartDIV"></div>
+<script type="text/javascript">
+var g = new JSGantt.GanttChart(document.getElementById('GanttChartDIV'), 'day');
+g.setOptions({
+    vCaptionType: 'Complete',  // Set to Show Caption : None,Caption,Resource,Duration,Complete,
+    vQuarterColWidth: 36,
+    vDateTaskDisplayFormat: 'day dd month yyyy', // Shown in tool tip box
+    vDayMajorDateDisplayFormat: 'mon yyyy - Week ww',// Set format to dates in the "Major" header of the "Day" view
+    vWeekMinorDateDisplayFormat: 'dd mon', // Set format to display dates in the "Minor" header of the "Week" view
+    vLang: 'en',
+    vShowTaskInfoLink: 1, // Show link in tool tip (0/1)
+    vShowEndWeekDate: 0,  // Show/Hide the date for the last day of the week in header for daily
+    vUseSingleCell: 10000, // Set the threshold cell per table row (Helps performance for large data.
+    vFormatArr: ['Day', 'Week', 'Month', 'Quarter'], // Even with setUseSingleCell using Hour format on such a large chart can cause issues in some browsers,
+    vTotalHeight: 1000,
+});
+var json_data = `
+{{{json_data}}}
+`;
+JSGantt.parseJSONString(json_data, g);
+g.Draw();
+</script>
@@ -0,0 +1,12 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION((),'2;1');
+FILE_NAME('EPset_Parametric.ifc','2020-01-01T00:00:00',(),(),'EPset_Parametric','EPset_Parametric',$);
+FILE_SCHEMA(('IFC4'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSETTEMPLATE('1Ja6GlovjFoeonRLXJwyyl',$,'EPset_Parametric','',.PSET_TYPEDRIVENOVERRIDE.,'IfcTypeObject',(#2,#3));
+#2=IFCSIMPLEPROPERTYTEMPLATE('2ZxSvp00j5hxrWv$Q8ajzx',$,'Engine','',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
+#3=IFCSIMPLEPROPERTYTEMPLATE('2AN6WomqXCjRkP0g2iwEjp',$,'LayerSetDirection','',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
+ENDSEC;
+END-ISO-10303-21;
@@ -0,0 +1,13 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION((),'2;1');
+FILE_NAME('EPset_Productivity.ifc','2020-01-01T00:00:00',(),(),'EPset_Productivity','EPset_Productivity',$);
+FILE_SCHEMA(('IFC4'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSETTEMPLATE('24XxTA2ED4o83uiZBG59D_',$,'EPset_Productivity','',.PSET_TYPEDRIVENOVERRIDE.,'IfcConstructionEquipmentResource,IfcLaborResource',(#2,#3,#4));
+#2=IFCSIMPLEPROPERTYTEMPLATE('3mL27FQ4X4MQn5fiGqIt8x',$,'BaseQuantityConsumed','',.P_SINGLEVALUE.,'IfcDuration',$,$,$,$,$,.READWRITE.);
+#3=IFCSIMPLEPROPERTYTEMPLATE('1DdJt5_Ar2mR4UDpO$98Ws',$,'BaseQuantityProducedName','',.P_SINGLEVALUE.,'IfcLabel',$,$,$,$,$,.READWRITE.);
+#4=IFCSIMPLEPROPERTYTEMPLATE('2OZPZ$Onb2gOvW20q7gacH',$,'BaseQuantityProducedValue','',.P_SINGLEVALUE.,'IfcReal',$,$,$,$,$,.READWRITE.);
+ENDSEC;
+END-ISO-10303-21;
@@ -0,0 +1,12 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION((),'2;1');
+FILE_NAME('Qto_TaskBaseQuantities.ifc','2020-01-01T00:00:00',(),(),'Qto_TaskBaseQuantities','Qto_TaskBaseQuantities',$);
+FILE_SCHEMA(('IFC4'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSETTEMPLATE('3uZCoCxrr8MA2yVRLzH6P4',$,'Qto_TaskBaseQuantities','',.QTO_OCCURRENCEDRIVEN.,'IfcTask',(#2,#3));
+#2=IFCSIMPLEPROPERTYTEMPLATE('0q8nByVuP4cv46Pm4wfGpf',$,'StandardWork','',.Q_TIME.,$,$,$,$,$,$,.READWRITE.);
+#3=IFCSIMPLEPROPERTYTEMPLATE('2uf5oHjAz4pRmtn9ihJiAs',$,'OvertimeWork','',.Q_TIME.,$,$,$,$,$,$,.READWRITE.);
+ENDSEC;
+END-ISO-10303-21;
@@ -1,6 +1,27 @@
-* { stroke-linecap: round; }
-.cut { fill: black; stroke: black; stroke-linecap: 'round'; stroke-width: 0.35; }
-.background { fill: white; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; }
+/*
+ * BlenderBIM Add-on - OpenBIM Blender Add-on
+ * Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+ *
+ * This file is part of BlenderBIM Add-on.
+ *
+ * BlenderBIM Add-on is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * BlenderBIM Add-on is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+* { stroke-linecap: round; stroke-linejoin: round; }
+text { fill: black; stroke: none; }
+.cut { fill: black; stroke: black; stroke-linecap: 'round'; stroke-width: 0.35; fill-rule: evenodd; }
+.projection { fill: white; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; }
 .annotation { fill: none; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; }
 .hidden { stroke-dasharray: 3, 2; }
 .solid {}
@@ -0,0 +1,30 @@
+/*
+ * BlenderBIM Add-on - OpenBIM Blender Add-on
+ * Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+ *
+ * This file is part of BlenderBIM Add-on.
+ *
+ * BlenderBIM Add-on is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * BlenderBIM Add-on is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+.cut { fill: white; stroke: black; stroke-linecap: 'round'; stroke-width: 0.35; }
+.background { fill: white; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; }
+.annotation { fill: none; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; }
+.hidden { stroke-dasharray: 3, 2; }
+.solid {}
+.leader { marker-end: url(#leader-marker); }
+.stair { marker-start: url(#stair-marker-start); marker-end: url(#stair-marker-end); }
+.break { fill: white; }
+.breakline { fill: none; stroke: black; stroke-linecap: 'round'; stroke-width: 0.25; marker-mid: url(#breakline-marker); }
+.IfcSpace { fill: none; stroke: none; }
@@ -25,7 +25,7 @@
    </rdf:RDF>
  </metadata>
  <desc
-     id="desc89610">/home/dion/Projects/IfcOpenShell/src/ifcblenderexport/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
+     id="desc89610">/home/dion/Projects/IfcOpenShell/src/blenderbim/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
  <rect
     style="fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:2.07874;stroke-linecap:round;stroke-linejoin:round;stop-color:#000000"
     id="rect1036"
@@ -25,7 +25,7 @@
    </rdf:RDF>
  </metadata>
  <desc
-     id="desc89610">/home/dion/Projects/IfcOpenShell/src/ifcblenderexport/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
+     id="desc89610">/home/dion/Projects/IfcOpenShell/src/blenderbim/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
  <rect
     y="3.1753578e-05"
     x="-4.3300333e-05"
@@ -25,7 +25,7 @@
    </rdf:RDF>
  </metadata>
  <desc
-     id="desc89610">/home/dion/Projects/IfcOpenShell/src/ifcblenderexport/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
+     id="desc89610">/home/dion/Projects/IfcOpenShell/src/blenderbim/titleblock.dxf - scale = 1.000000, origin = (0.000000, 0.000000), method = manual</desc>
  <rect
     y="3.1753578e-05"
     x="-4.3300333e-05"
@@ -0,0 +1,214 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+presets = {
+    "Basic": ["project", "search", "bcf", "attribute", "spatial", "pset", "qto"],
+    "Admin": [
+        "project",
+        "search",
+        "bcf",
+        "root",
+        "unit",
+        "model",
+        "georeference",
+        "context",
+        "drawing",
+        "misc",
+        "attribute",
+        "type",
+        "spatial",
+        "void",
+        "aggregate",
+        "geometry",
+        "cobie",
+        "resource",
+        "cost",
+        "sequence",
+        "group",
+        "system",
+        "structural",
+        "boundary",
+        "profile",
+        "material",
+        "style",
+        "layer",
+        "owner",
+        "pset",
+        "qto",
+        "classification",
+        "constraint",
+        "document",
+        "pset_template",
+        "clash",
+        "lca",
+        "csv",
+        "bimtester",
+        "diff",
+        "patch",
+        "covetool",
+        "augin",
+        "debug",
+    ],
+    "BIM Coordination": [
+        "project",
+        "search",
+        "bcf",
+        "root",
+        "unit",
+        "georeference",
+        "attribute",
+        "type",
+        "spatial",
+        "void",
+        "aggregate",
+        "owner",
+        "pset",
+        "qto",
+        "clash",
+        "csv",
+        "bimtester",
+        "diff",
+        "patch",
+        "debug",
+    ],
+    "Architecture": [
+        "project",
+        "search",
+        "bcf",
+        "root",
+        "unit",
+        "model",
+        "georeference",
+        "context",
+        "drawing",
+        "misc",
+        "attribute",
+        "type",
+        "spatial",
+        "void",
+        "aggregate",
+        "geometry",
+        "group",
+        "system",
+        "boundary",
+        "profile",
+        "material",
+        "style",
+        "layer",
+        "owner",
+        "pset",
+        "qto",
+        "classification",
+        "pset_template",
+        "clash",
+        "csv",
+    ],
+    "Structural Engineering": [
+        "project",
+        "search",
+        "bcf",
+        "root",
+        "unit",
+        "model",
+        "georeference",
+        "context",
+        "drawing",
+        "misc",
+        "attribute",
+        "type",
+        "spatial",
+        "void",
+        "aggregate",
+        "geometry",
+        "group",
+        "system",
+        "structural",
+        "boundary",
+        "profile",
+        "material",
+        "style",
+        "layer",
+        "owner",
+        "pset",
+        "qto",
+        "classification",
+        "pset_template",
+        "clash",
+        "csv",
+    ],
+    "MEP": [
+        "project",
+        "search",
+        "bcf",
+        "root",
+        "unit",
+        "model",
+        "georeference",
+        "context",
+        "drawing",
+        "misc",
+        "attribute",
+        "type",
+        "spatial",
+        "void",
+        "aggregate",
+        "geometry",
+        "group",
+        "system",
+        "boundary",
+        "profile",
+        "material",
+        "style",
+        "layer",
+        "owner",
+        "pset",
+        "qto",
+        "classification",
+        "pset_template",
+        "clash",
+        "csv",
+    ],
+    "Quantity Surveying": ["project", "search", "attribute", "spatial", "void", "pset", "qto", "classification", "csv"],
+    "Model Enrichment": [
+        "project",
+        "search",
+        "root",
+        "attribute",
+        "spatial",
+        "pset",
+        "qto",
+        "pset_template",
+        "csv",
+        "patch",
+    ],
+    "3D Visualisation": ["project", "search", "bcf", "attribute", "spatial", "pset", "qto"],
+    "4D Scheduling": ["project", "search", "attribute", "spatial", "resource", "cost", "sequence", "pset", "qto"],
+    "5D Cost Management": [
+        "project",
+        "search",
+        "attribute",
+        "spatial",
+        "resource",
+        "cost",
+        "sequence",
+        "pset",
+        "qto",
+        "lca",
+    ],
+    "Facility Management": ["project", "search", "attribute", "spatial", "cobie", "pset", "qto", "lca"],
+}
@@ -0,0 +1,209 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import bpy
+import json
+import numpy as np
+import datetime
+import zipfile
+import tempfile
+import addon_utils
+import ifcopenshell
+import ifcopenshell.api
+import ifcopenshell.util.placement
+import blenderbim.tool as tool
+import blenderbim.core.aggregate
+import blenderbim.core.spatial
+import blenderbim.core.style
+from blenderbim.bim.ifc import IfcStore
+from mathutils import Vector
+
+
+class IfcExporter:
+    def __init__(self, ifc_export_settings):
+        self.ifc_export_settings = ifc_export_settings
+
+    def export(self):
+        self.file = IfcStore.get_file()
+        self.set_header()
+        IfcStore.update_cache()
+        if bpy.context.scene.BIMProjectProperties.is_authoring:
+            self.sync_deletions()
+            self.sync_all_objects()
+            self.sync_edited_objects()
+        extension = self.ifc_export_settings.output_file.split(".")[-1]
+        if extension == "ifczip":
+            with tempfile.TemporaryDirectory() as unzipped_path:
+                filename, ext = os.path.splitext(os.path.basename(self.ifc_export_settings.output_file))
+                tmp_name = "{}.ifc".format(filename)
+                tmp_file = os.path.join(unzipped_path, tmp_name)
+                self.file.write(tmp_file)
+                with zipfile.ZipFile(
+                    self.ifc_export_settings.output_file, mode="w", compression=zipfile.ZIP_DEFLATED, compresslevel=9
+                ) as zf:
+                    zf.write(tmp_file)
+        elif extension == "ifc":
+            self.file.write(self.ifc_export_settings.output_file)
+        elif extension == "ifcjson":
+            import ifcjson
+
+            if self.ifc_export_settings.json_version == "4":
+                jsonData = ifcjson.IFC2JSON4(self.file, self.ifc_export_settings.json_compact).spf2Json()
+                with open(self.ifc_export_settings.output_file, "w") as outfile:
+                    json.dump(jsonData, outfile, indent=None if self.ifc_export_settings.json_compact else 4)
+            elif self.ifc_export_settings.json_version == "5a":
+                jsonData = ifcjson.IFC2JSON5a(self.file, self.ifc_export_settings.json_compact).spf2Json()
+                with open(self.ifc_export_settings.output_file, "w") as outfile:
+                    json.dump(jsonData, outfile, indent=None if self.ifc_export_settings.json_compact else 4)
+
+    def set_header(self):
+        self.file.wrapped_data.header.file_name.name = os.path.basename(self.ifc_export_settings.output_file)
+        self.file.wrapped_data.header.file_name.time_stamp = (
+            datetime.datetime.utcnow()
+            .replace(tzinfo=datetime.timezone.utc)
+            .astimezone()
+            .replace(microsecond=0)
+            .isoformat()
+        )
+        self.file.wrapped_data.header.file_name.preprocessor_version = "IfcOpenShell {}".format(ifcopenshell.version)
+        self.file.wrapped_data.header.file_name.originating_system = "{} {}".format(
+            self.get_application_name(), self.get_application_version()
+        )
+
+    def sync_deletions(self):
+        results = []
+        for ifc_definition_id in IfcStore.deleted_ids:
+            try:
+                product = self.file.by_id(ifc_definition_id)
+                if hasattr(product, "GlobalId"):
+                    results.append(product.GlobalId)
+            except:
+                continue
+            ifcopenshell.api.run("root.remove_product", self.file, **{"product": product})
+        return results
+
+    def sync_all_objects(self):
+        results = []
+        self.unit_scale = ifcopenshell.util.unit.calculate_unit_scale(self.file)
+        for ifc_definition_id in list(IfcStore.id_map.keys()):
+            obj = IfcStore.id_map[ifc_definition_id]
+            try:
+                if isinstance(obj, bpy.types.Material):
+                    continue
+                tool.Collector.sync(obj)
+                result = self.sync_object_placement(obj)
+                if result:
+                    results.append(result)
+                result = self.sync_object_material(obj)
+                if result:
+                    results.append(result)
+            except ReferenceError:
+                pass  # The object is likely deleted
+        return results
+
+    def sync_edited_objects(self):
+        results = []
+        for obj in IfcStore.edited_objs.copy():
+            if not obj:
+                continue
+            try:
+                if isinstance(obj, bpy.types.Material):
+                    blenderbim.core.style.update_style_colours(tool.Ifc, tool.Style, obj=obj)
+                else:
+                    element = tool.Ifc.get_entity(obj)
+                    if element:
+                        results.append(element)
+                    bpy.ops.bim.update_representation(obj=obj.name)
+            except ReferenceError:
+                pass  # The object is likely deleted
+        IfcStore.edited_objs.clear()
+        return results
+
+    def sync_object_material(self, obj):
+        if not obj.data or not isinstance(obj.data, bpy.types.Mesh):
+            return
+        if not self.has_changed_materials(obj):
+            return
+        bpy.ops.bim.update_representation(obj=obj.name)
+
+    def has_changed_materials(self, obj):
+        checksum = obj.data.BIMMeshProperties.material_checksum
+        return checksum != str([s.id() for s in tool.Geometry.get_styles(obj) if s])
+
+    def sync_object_placement(self, obj):
+        if not self.has_object_moved(obj):
+            return
+        blender_matrix = np.array(obj.matrix_world)
+        element = self.file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+        if (obj.scale - Vector((1.0, 1.0, 1.0))).length > 1e-4:
+            bpy.ops.bim.update_representation(obj=obj.name)
+            return element
+        if element.is_a("IfcGridAxis"):
+            return self.sync_grid_axis_object_placement(obj, element)
+        if not hasattr(element, "ObjectPlacement"):
+            return
+        blenderbim.core.geometry.edit_object_placement(tool.Ifc, tool.Geometry, tool.Surveyor, obj=obj)
+        return element
+
+    def has_object_moved(self, obj):
+        if not obj.BIMObjectProperties.location_checksum:
+            return True  # Let's be conservative
+        loc_check = np.frombuffer(eval(obj.BIMObjectProperties.location_checksum))
+        rot_check = np.frombuffer(eval(obj.BIMObjectProperties.rotation_checksum))
+        loc_real = np.array(obj.matrix_world.translation).flatten()
+        rot_real = np.array(obj.matrix_world.to_3x3()).flatten()
+        if np.allclose(loc_check, loc_real, atol=1e-4) and np.allclose(rot_check, rot_real, atol=1e-2):
+            return False
+        return True
+
+    def sync_grid_axis_object_placement(self, obj, element):
+        grid = (element.PartOfU or element.PartOfV or element.PartOfW)[0]
+        grid_obj = tool.Ifc.get_object(grid)
+        if grid_obj:
+            self.sync_object_placement(grid_obj)
+            if grid_obj.matrix_world != obj.matrix_world:
+                bpy.ops.bim.update_representation(obj=obj.name)
+
+    def get_application_name(self):
+        return "BlenderBIM"
+
+    def get_application_version(self):
+        return ".".join(
+            [
+                str(x)
+                for x in [
+                    addon.bl_info.get("version", (-1, -1, -1))
+                    for addon in addon_utils.modules()
+                    if addon.bl_info["name"] == "BlenderBIM"
+                ][0]
+            ]
+        )
+
+
+class IfcExportSettings:
+    def __init__(self):
+        self.logger = None
+        self.output_file = None
+
+    @staticmethod
+    def factory(context, output_file, logger):
+        settings = IfcExportSettings()
+        settings.output_file = output_file
+        settings.logger = logger
+        return settings
@@ -0,0 +1,306 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import json
+import addon_utils
+import ifcopenshell.api.owner.settings
+import blenderbim.tool as tool
+import blenderbim.core.owner as core_owner
+from blenderbim.bim.module.drawing.prop import RasterStyleProperty
+from bpy.app.handlers import persistent
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.owner.prop import get_user_person, get_user_organisation
+from ifcopenshell.api.attribute.data import Data as AttributeData
+from ifcopenshell.api.material.data import Data as MaterialData
+from ifcopenshell.api.style.data import Data as StyleData
+from ifcopenshell.api.type.data import Data as TypeData
+
+
+global_subscription_owner = object()
+
+
+def mode_callback(obj, data):
+    if not bpy.context.scene.BIMProjectProperties.is_authoring:
+        return
+    objects = bpy.context.selected_objects
+    if bpy.context.active_object:
+        objects += [bpy.context.active_object]
+    for obj in objects:
+        if (
+            obj.mode != "EDIT"
+            or not obj.data
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
+        ):
+            continue
+        if obj.data.BIMMeshProperties.ifc_definition_id:
+            IfcStore.edited_objs.add(obj)
+        elif IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id).is_a("IfcGridAxis"):
+            IfcStore.edited_objs.add(obj)
+
+
+def name_callback(obj, data):
+    # TODO Do we still need this, now that we are monitoring the undo redo objects?
+    try:
+        obj.name
+    except:
+        return  # In case the object RNA is gone during an undo / redo operation
+    # Blender names are up to 63 UTF-8 bytes
+    if len(bytes(obj.name, "utf-8")) >= 63:
+        return
+
+    if isinstance(obj, bpy.types.Material):
+        if obj.BIMObjectProperties.ifc_definition_id:
+            IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id).Name = obj.name
+            AttributeData.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
+            MaterialData.load_materials()
+        if obj.BIMMaterialProperties.ifc_style_id:
+            IfcStore.get_file().by_id(obj.BIMMaterialProperties.ifc_style_id).Name = obj.name
+            StyleData.load(IfcStore.get_file(), obj.BIMMaterialProperties.ifc_style_id)
+        return
+
+    if not obj.BIMObjectProperties.ifc_definition_id or "/" not in obj.name:
+        return
+    element = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+    if not element.is_a("IfcRoot"):
+        return
+    if element.is_a("IfcSpatialStructureElement") or (hasattr(element, "IsDecomposedBy") and element.IsDecomposedBy):
+        collection = obj.users_collection[0]
+        collection.name = obj.name
+    if element.is_a("IfcGrid"):
+        axis_obj = IfcStore.get_element(element.UAxes[0].id())
+        axis_collection = axis_obj.users_collection[0]
+        grid_collection = None
+        for collection in bpy.data.collections:
+            if axis_collection.name in collection.children.keys():
+                grid_collection = collection
+                break
+        if grid_collection:
+            grid_collection.name = obj.name
+    if element.is_a("IfcTypeProduct"):
+        TypeData.purge()
+    element.Name = "/".join(obj.name.split("/")[1:])
+    AttributeData.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
+
+
+def color_callback(obj, data):
+    if obj.BIMMaterialProperties.ifc_style_id:
+        IfcStore.edited_objs.add(obj)
+
+
+def active_object_callback():
+    refresh_ui_data()
+
+
+def subscribe_to(object, data_path, callback):
+    try:
+        subscribe_to = object.path_resolve(data_path, False)
+    except:
+        return
+    bpy.msgbus.subscribe_rna(
+        key=subscribe_to,
+        owner=object,
+        args=(
+            object,
+            data_path,
+        ),
+        notify=callback,
+        options={
+            "PERSISTENT",
+        },
+    )
+
+
+def refresh_ui_data():
+    from blenderbim.bim import modules
+
+    for name, value in modules.items():
+        try:
+            getattr(value, "data").refresh()
+        except AttributeError:
+            pass
+
+
+def purge_module_data():
+    from blenderbim.bim import modules
+
+    refresh_ui_data()
+    for name, value in modules.items():
+        try:
+            getattr(getattr(getattr(ifcopenshell.api, name), "data"), "Data").purge()
+        except AttributeError:
+            pass
+
+        try:
+            getattr(value, "prop").purge()
+        except AttributeError:
+            pass
+
+
+@persistent
+def loadIfcStore(scene):
+    IfcStore.purge()
+    purge_module_data()
+    if not IfcStore.get_file():
+        return
+    IfcStore.get_schema()
+    IfcStore.reload_linked_elements()
+
+
+@persistent
+def undo_pre(scene):
+    IfcStore.update_undo_redo_stack_objects()
+
+
+@persistent
+def undo_post(scene):
+    if IfcStore.last_transaction != bpy.context.scene.BIMProperties.last_transaction:
+        IfcStore.last_transaction = bpy.context.scene.BIMProperties.last_transaction
+        IfcStore.undo()
+        purge_module_data()
+    IfcStore.update_undo_redo_stack_objects()
+    IfcStore.reload_linked_elements(objects=[bpy.data.objects.get(o) for o in IfcStore.undo_redo_stack_objects])
+
+
+@persistent
+def redo_pre(scene):
+    IfcStore.update_undo_redo_stack_objects()
+
+
+@persistent
+def redo_post(scene):
+    if IfcStore.last_transaction != bpy.context.scene.BIMProperties.last_transaction:
+        IfcStore.last_transaction = bpy.context.scene.BIMProperties.last_transaction
+        IfcStore.redo()
+        purge_module_data()
+    IfcStore.update_undo_redo_stack_objects()
+    IfcStore.reload_linked_elements(objects=[bpy.data.objects.get(o) for o in IfcStore.undo_redo_stack_objects])
+
+
+@persistent
+def ensureIfcExported(scene):
+    if IfcStore.get_file() and not bpy.context.scene.BIMProperties.ifc_file:
+        bpy.ops.export_ifc.bim("INVOKE_DEFAULT")
+
+
+def get_application(ifc):
+    # TODO: cache this for even faster application retrieval. It honestly makes a difference on long scripts.
+    version = get_application_version()
+    for element in ifc.by_type("IfcApplication"):
+        if element.ApplicationIdentifier == "BlenderBIM" and element.Version == version:
+            return element
+    return ifcopenshell.api.run(
+        "owner.add_application",
+        ifc,
+        version=version,
+        application_full_name="BlenderBIM Add-on",
+        application_identifier="BlenderBIM",
+    )
+
+
+def get_application_version():
+    return ".".join(
+        [
+            str(x)
+            for x in [
+                addon.bl_info.get("version", (-1, -1, -1))
+                for addon in addon_utils.modules()
+                if addon.bl_info["name"] == "BlenderBIM"
+            ][0]
+        ]
+    )
+
+
+@persistent
+def setDefaultProperties(scene):
+    global global_subscription_owner
+    active_object_key = bpy.types.LayerObjects, "active"
+    bpy.msgbus.subscribe_rna(
+        key=active_object_key, owner=global_subscription_owner, args=(), notify=active_object_callback
+    )
+    ifcopenshell.api.owner.settings.get_user = lambda ifc: core_owner.get_user(tool.Owner)
+    ifcopenshell.api.owner.settings.get_application = get_application
+    # TODO: Move to drawing module
+    if len(bpy.context.scene.DocProperties.drawing_styles) == 0:
+        drawing_style = bpy.context.scene.DocProperties.drawing_styles.add()
+        drawing_style.name = "Technical"
+        drawing_style.render_type = "VIEWPORT"
+        drawing_style.raster_style = json.dumps(
+            {
+                RasterStyleProperty.WORLD_COLOR.value: (1, 1, 1),
+                RasterStyleProperty.RENDER_ENGINE.value: "BLENDER_WORKBENCH",
+                RasterStyleProperty.RENDER_TRANSPARENT.value: False,
+                RasterStyleProperty.SHADING_SHOW_OBJECT_OUTLINE.value: True,
+                RasterStyleProperty.SHADING_SHOW_CAVITY.value: False,
+                RasterStyleProperty.SHADING_CAVITY_TYPE.value: "BOTH",
+                RasterStyleProperty.SHADING_CURVATURE_RIDGE_FACTOR.value: 1,
+                RasterStyleProperty.SHADING_CURVATURE_VALLEY_FACTOR.value: 1,
+                RasterStyleProperty.VIEW_TRANSFORM.value: "Standard",
+                RasterStyleProperty.SHADING_LIGHT.value: "FLAT",
+                RasterStyleProperty.SHADING_COLOR_TYPE.value: "SINGLE",
+                RasterStyleProperty.SHADING_SINGLE_COLOR.value: (1, 1, 1),
+                RasterStyleProperty.SHADING_SHOW_SHADOWS.value: False,
+                RasterStyleProperty.SHADING_SHADOW_INTENSITY.value: 0.5,
+                RasterStyleProperty.DISPLAY_LIGHT_DIRECTION.value: (0.5, 0.5, 0.5),
+                RasterStyleProperty.VIEW_USE_CURVE_MAPPING.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_WIREFRAMES.value: True,
+                RasterStyleProperty.OVERLAY_WIREFRAME_THRESHOLD.value: 0,
+                RasterStyleProperty.OVERLAY_SHOW_FLOOR.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_X.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_Y.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_Z.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_OBJECT_ORIGINS.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_RELATIONSHIP_LINES.value: False,
+            }
+        )
+        drawing_style = bpy.context.scene.DocProperties.drawing_styles.add()
+        drawing_style.name = "Shaded"
+        drawing_style.render_type = "VIEWPORT"
+        drawing_style.raster_style = json.dumps(
+            {
+                RasterStyleProperty.WORLD_COLOR.value: (1, 1, 1),
+                RasterStyleProperty.RENDER_ENGINE.value: "BLENDER_WORKBENCH",
+                RasterStyleProperty.RENDER_TRANSPARENT.value: False,
+                RasterStyleProperty.SHADING_SHOW_OBJECT_OUTLINE.value: True,
+                RasterStyleProperty.SHADING_SHOW_CAVITY.value: True,
+                RasterStyleProperty.SHADING_CAVITY_TYPE.value: "BOTH",
+                RasterStyleProperty.SHADING_CURVATURE_RIDGE_FACTOR.value: 1,
+                RasterStyleProperty.SHADING_CURVATURE_VALLEY_FACTOR.value: 1,
+                RasterStyleProperty.VIEW_TRANSFORM.value: "Standard",
+                RasterStyleProperty.SHADING_LIGHT.value: "STUDIO",
+                RasterStyleProperty.SHADING_COLOR_TYPE.value: "MATERIAL",
+                RasterStyleProperty.SHADING_SINGLE_COLOR.value: (1, 1, 1),
+                RasterStyleProperty.SHADING_SHOW_SHADOWS.value: True,
+                RasterStyleProperty.SHADING_SHADOW_INTENSITY.value: 0.5,
+                RasterStyleProperty.DISPLAY_LIGHT_DIRECTION.value: (0.5, 0.5, 0.5),
+                RasterStyleProperty.VIEW_USE_CURVE_MAPPING.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_WIREFRAMES.value: False,
+                RasterStyleProperty.OVERLAY_WIREFRAME_THRESHOLD.value: 0,
+                RasterStyleProperty.OVERLAY_SHOW_FLOOR.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_X.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_Y.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_AXIS_Z.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_OBJECT_ORIGINS.value: False,
+                RasterStyleProperty.OVERLAY_SHOW_RELATIONSHIP_LINES.value: False,
+            }
+        )
+        drawing_style = bpy.context.scene.DocProperties.drawing_styles.add()
+        drawing_style.name = "Blender Default"
+        drawing_style.render_type = "DEFAULT"
+        bpy.ops.bim.save_drawing_style(index="2")
@@ -0,0 +1,99 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import json
+import math
+import ifcopenshell
+import ifcopenshell.util.attribute
+from mathutils import geometry
+from mathutils import Vector
+from blenderbim.bim.ifc import IfcStore
+
+
+def draw_attributes(props, layout, copy_operator=None):
+    for attribute in props:
+        row = layout.row(align=True)
+        draw_attribute(attribute, row, copy_operator)
+
+
+def draw_attribute(attribute, layout, copy_operator=None):
+    value_name = attribute.get_value_name()
+    if not value_name:
+        layout.label(text=attribute.name)
+        return
+    layout.prop(
+        attribute,
+        value_name,
+        text=attribute.name,
+    )
+    if attribute.is_optional:
+        layout.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+    if copy_operator:
+        op = layout.operator(f"{copy_operator}", text="", icon="COPYDOWN")
+        op.name = attribute.name
+
+
+def import_attributes(ifc_class, props, data, callback=None):
+    for attribute in IfcStore.get_schema().declaration_by_name(ifc_class).all_attributes():
+        import_attribute(attribute, props, data, callback=callback)
+
+
+# A more elegant attribute importer signature, intended to supersede import_attributes
+def import_attributes2(element, props, callback=None):
+    for attribute in element.wrapped_data.declaration().as_entity().all_attributes():
+        import_attribute(attribute, props, element.get_info(), callback=callback)
+
+
+def import_attribute(attribute, props, data, callback=None):
+    data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+    if isinstance(data_type, tuple) or data_type == "entity":
+        callback(attribute.name(), None, data) if callback else None
+        return
+    new = props.add()
+    new.name = attribute.name()
+    new.is_null = data[attribute.name()] is None
+    new.is_optional = attribute.optional()
+    new.data_type = data_type if isinstance(data_type, str) else ""
+    is_handled_by_callback = callback(attribute.name(), new, data) if callback else None
+    if is_handled_by_callback:
+        pass  # Our job is done
+    elif is_handled_by_callback is False:
+        props.remove(len(props) - 1)
+    elif data_type == "string":
+        new.string_value = "" if new.is_null else data[attribute.name()]
+    elif data_type == "boolean":
+        new.bool_value = False if new.is_null else data[attribute.name()]
+    elif data_type == "integer":
+        new.int_value = 0 if new.is_null else data[attribute.name()]
+    elif data_type == "float":
+        new.float_value = 0.0 if new.is_null else data[attribute.name()]
+    elif data_type == "enum":
+        new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
+        if data[attribute.name()]:
+            new.enum_value = data[attribute.name()]
+
+
+def export_attributes(props, callback=None):
+    attributes = {}
+    for prop in props:
+        is_handled_by_callback = callback(attributes, prop) if callback else False
+        if is_handled_by_callback:
+            continue  # Our job is done
+        attributes[prop.name] = prop.get_value()
+    return attributes
@@ -0,0 +1,337 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021, 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import bpy
+import uuid
+import hashlib
+import zipfile
+import tempfile
+import ifcopenshell
+import blenderbim.bim.handler
+from pathlib import Path
+
+
+class IfcStore:
+    path = ""
+    file = None
+    schema = None
+    cache = None
+    cache_path = None
+    id_map = {}
+    guid_map = {}
+    deleted_ids = set()
+    edited_objs = set()
+    pset_template_path = ""
+    pset_template_file = None
+    library_path = ""
+    library_file = None
+    element_listeners = set()
+    undo_redo_stack_objects = set()
+    current_transaction = ""
+    last_transaction = ""
+    history = []
+    future = []
+    schema_identifiers = ["IFC4", "IFC2X3"]
+
+    @staticmethod
+    def purge():
+        IfcStore.path = ""
+        IfcStore.file = None
+        IfcStore.schema = None
+        IfcStore.cache = None
+        IfcStore.cache_path = None
+        IfcStore.id_map = {}
+        IfcStore.guid_map = {}
+        IfcStore.deleted_ids = set()
+        IfcStore.edited_objs = set()
+        IfcStore.pset_template_path = ""
+        IfcStore.pset_template_file = None
+        IfcStore.library_path = ""
+        IfcStore.library_file = None
+        IfcStore.schema_identifiers = ["IFC4", "IFC2X3"]
+
+    @staticmethod
+    def get_file():
+        if IfcStore.file is None:
+            IfcStore.path = bpy.context.scene.BIMProperties.ifc_file
+            if not os.path.isabs(IfcStore.path):
+                IfcStore.path = os.path.abspath(os.path.join(bpy.path.abspath("//"), IfcStore.path))
+            if IfcStore.path:
+                try:
+                    IfcStore.load_file(IfcStore.path)
+                except:
+                    pass
+        return IfcStore.file
+
+    @staticmethod
+    def get_cache():
+        if IfcStore.cache is None and IfcStore.path:
+            ifc_key = IfcStore.path + IfcStore.file.wrapped_data.header.file_name.time_stamp
+            ifc_hash = hashlib.md5(ifc_key.encode("utf-8")).hexdigest()
+            IfcStore.cache_path = os.path.join(bpy.context.scene.BIMProperties.data_dir, "cache", f"{ifc_hash}.h5")
+            cache_settings = ifcopenshell.geom.settings()
+            try:
+                IfcStore.cache = ifcopenshell.geom.serializers.hdf5(IfcStore.cache_path, cache_settings)
+            except:
+                return
+        return IfcStore.cache
+
+    @staticmethod
+    def update_cache():
+        if not IfcStore.cache:
+            return
+        ifc_key = IfcStore.path + IfcStore.file.wrapped_data.header.file_name.time_stamp
+        ifc_hash = hashlib.md5(ifc_key.encode("utf-8")).hexdigest()
+        new_cache_path = os.path.join(bpy.context.scene.BIMProperties.data_dir, "cache", f"{ifc_hash}.h5")
+        IfcStore.cache = None
+        os.replace(IfcStore.cache_path, new_cache_path)
+        IfcStore.get_cache()
+
+    @staticmethod
+    def load_file(path):
+        extension = path.split(".")[-1]
+        if extension.lower() == "ifczip":
+            with tempfile.TemporaryDirectory() as unzipped_path:
+                with zipfile.ZipFile(path, "r") as zip_ref:
+                    zip_ref.extractall(unzipped_path)
+                for filename in Path(unzipped_path).glob("**/*.ifc"):
+                    IfcStore.file = ifcopenshell.open(filename)
+                    return
+        elif extension.lower() == "ifcxml":
+            IfcStore.file = ifcopenshell.file(ifcopenshell.ifcopenshell_wrapper.parse_ifcxml(path))
+        elif extension.lower() == "ifc":
+            IfcStore.file = ifcopenshell.open(path)
+
+    @staticmethod
+    def get_schema():
+        if IfcStore.file is None:
+            IfcStore.schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(
+                bpy.context.scene.BIMProjectProperties.export_schema
+            )
+        elif IfcStore.schema is None:
+            IfcStore.schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(IfcStore.file.schema)
+        return IfcStore.schema
+
+    @staticmethod
+    def get_element(id_or_guid):
+        if isinstance(id_or_guid, int):
+            map_object = IfcStore.id_map
+        else:
+            map_object = IfcStore.guid_map
+        try:
+            obj = map_object[id_or_guid]
+            obj.name  # In case the object has been deleted, this triggers an exception
+        except:
+            return
+        return obj
+
+    @staticmethod
+    def add_element_listener(callback):
+        IfcStore.element_listeners.add(callback)
+
+    @staticmethod
+    def update_undo_redo_stack_objects():
+        """Keeps track of selected object names, typically during undo and redo
+
+        When any Blender object is stored outside a Blender PointerProperty, such as
+        in a regular Python list, there is the likely probability that the object
+        will be invalidated when undo or redo occurs. Object invalidation seems to
+        only occur for selected objects either pre/post undo/redo event, including
+        selected objects for consecutive undo/redos, and all children.
+
+        So if I first select o1, then o2, then o3, then press undo, o3 will be
+        invalidated. If instead I press undo twice, o3 and o2 will be invalidated.
+        """
+        if bpy.context.active_object:
+            objects = set([o.name for o in bpy.context.selected_objects + [bpy.context.active_object]])
+            objects.update([o.name for o in bpy.context.active_object.children])
+        else:
+            objects = set([o.name for o in bpy.context.selected_objects])
+        for obj in bpy.context.selected_objects:
+            objects.update([o.name for o in obj.children])
+        IfcStore.undo_redo_stack_objects |= objects
+
+    @staticmethod
+    def reload_linked_elements(objects=None):
+        file = IfcStore.get_file()
+        if not file:
+            return
+        if objects is None:
+            objects = bpy.data.objects
+
+        for obj in objects:
+            if not obj:
+                continue
+            if not obj.BIMObjectProperties.ifc_definition_id:
+                continue
+            element = file.by_id(obj.BIMObjectProperties.ifc_definition_id)
+            data = {"id": element.id(), "obj": obj.name}
+            if hasattr(element, "GlobalId"):
+                data["guid"] = element.GlobalId
+            IfcStore.commit_link_element(data)
+
+    @staticmethod
+    def link_element(element, obj):
+        IfcStore.id_map[element.id()] = obj
+        if hasattr(element, "GlobalId"):
+            IfcStore.guid_map[element.GlobalId] = obj
+
+        if element.is_a("IfcSurfaceStyle"):
+            obj.BIMMaterialProperties.ifc_style_id = element.id()
+        else:
+            obj.BIMObjectProperties.ifc_definition_id = element.id()
+
+        blenderbim.bim.handler.subscribe_to(obj, "name", blenderbim.bim.handler.name_callback)
+
+        if isinstance(obj, bpy.types.Material):
+            blenderbim.bim.handler.subscribe_to(obj, "diffuse_color", blenderbim.bim.handler.color_callback)
+        elif isinstance(obj, bpy.types.Object):
+            blenderbim.bim.handler.subscribe_to(obj, "mode", blenderbim.bim.handler.mode_callback)
+
+        for listener in IfcStore.element_listeners:
+            listener(element, obj)
+
+        if IfcStore.history:
+            data = {"id": element.id(), "guid": getattr(element, "GlobalId", None), "obj": obj.name}
+            IfcStore.history[-1]["operations"].append(
+                {"rollback": IfcStore.rollback_link_element, "commit": IfcStore.commit_link_element, "data": data}
+            )
+
+    @staticmethod
+    def rollback_link_element(data):
+        del IfcStore.id_map[data["id"]]
+        if data["guid"]:
+            del IfcStore.guid_map[data["guid"]]
+
+    @staticmethod
+    def commit_link_element(data):
+        obj = bpy.data.objects.get(data["obj"])
+        IfcStore.id_map[data["id"]] = obj
+        if "guid" in data:
+            IfcStore.guid_map[data["guid"]] = obj
+        blenderbim.bim.handler.subscribe_to(obj, "mode", blenderbim.bim.handler.mode_callback)
+        blenderbim.bim.handler.subscribe_to(obj, "name", blenderbim.bim.handler.name_callback)
+        if isinstance(obj, bpy.types.Material):
+            blenderbim.bim.handler.subscribe_to(obj, "diffuse_color", blenderbim.bim.handler.color_callback)
+        # TODO Listeners are not re-registered. Does this cause nasty problems to debug later on?
+        # TODO We're handling id_map and guid_map, but what about edited_objs? This might cause big problems.
+
+    @staticmethod
+    def unlink_element(element=None, obj=None):
+        if element is None:
+            try:
+                element = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+            except:
+                pass
+
+        if obj is None:
+            try:
+                potential_obj = IfcStore.id_map[element.id()]
+                potential_obj.name
+                obj = potential_obj
+            except:
+                pass
+
+        try:
+            if element:
+                del IfcStore.id_map[element.id()]
+            else:
+                del IfcStore.id_map[obj.BIMObjectProperties.ifc_definition_id]
+        except:
+            pass
+
+        try:
+            if element and hasattr(element, "GlobalId"):
+                del IfcStore.guid_map[element.GlobalId]
+        except:
+            pass
+
+        if element and element.is_a("IfcSurfaceStyle"):
+            obj.BIMMaterialProperties.ifc_style_id = 0
+        elif obj:
+            obj.BIMObjectProperties.ifc_definition_id = 0
+
+    @staticmethod
+    def execute_ifc_operator(operator, context):
+        is_top_level_operator = not bool(IfcStore.current_transaction)
+
+        if is_top_level_operator:
+            IfcStore.begin_transaction(operator)
+            IfcStore.get_file().begin_transaction()
+            # This empty transaction ensures that each operator has at least one transaction
+            IfcStore.add_transaction_operation(operator, rollback=lambda data: True, commit=lambda data: True)
+        else:
+            operator.transaction_key = IfcStore.current_transaction
+
+        result = getattr(operator, "_execute")(context)
+
+        if is_top_level_operator:
+            IfcStore.get_file().end_transaction()
+            IfcStore.add_transaction_operation(
+                operator, rollback=lambda d: IfcStore.get_file().undo(), commit=lambda d: IfcStore.get_file().redo()
+            )
+            IfcStore.end_transaction(operator)
+            blenderbim.bim.handler.refresh_ui_data()
+
+        return result
+
+    @staticmethod
+    def begin_transaction(operator):
+        IfcStore.undo_redo_stack_objects = set()
+        IfcStore.current_transaction = str(uuid.uuid4())
+        operator.transaction_key = IfcStore.current_transaction
+
+    @staticmethod
+    def end_transaction(operator):
+        IfcStore.current_transaction = ""
+        operator.transaction_key = ""
+
+    @staticmethod
+    def add_transaction_operation(operator, rollback=None, commit=None):
+        key = getattr(operator, "transaction_key", None)
+        data = getattr(operator, "transaction_data", None)
+        bpy.context.scene.BIMProperties.last_transaction = key
+        IfcStore.last_transaction = key
+        rollback = rollback or getattr(operator, "rollback", lambda data: True)
+        commit = commit or getattr(operator, "commit", lambda data: True)
+        if IfcStore.history and IfcStore.history[-1]["key"] == key:
+            IfcStore.history[-1]["operations"].append({"rollback": rollback, "commit": commit, "data": data})
+        else:
+            IfcStore.history.append(
+                {"key": key, "operations": [{"rollback": rollback, "commit": commit, "data": data}]}
+            )
+        IfcStore.future = []
+
+    @staticmethod
+    def undo():
+        if not IfcStore.history:
+            return
+        event = IfcStore.history.pop()
+        for transaction in event["operations"][::-1]:
+            transaction["rollback"](transaction["data"])
+        IfcStore.future.append(event)
+
+    @staticmethod
+    def redo():
+        if not IfcStore.future:
+            return
+        event = IfcStore.future.pop()
+        for transaction in event["operations"]:
+            transaction["commit"](transaction["data"])
+        IfcStore.history.append(event)
@@ -0,0 +1,17 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
@@ -0,0 +1,38 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+from . import ui, prop, operator
+
+classes = (
+    operator.AssignObject,
+    operator.UnassignObject,
+    operator.EnableEditingAggregate,
+    operator.DisableEditingAggregate,
+    operator.AddAggregate,
+    prop.BIMObjectAggregateProperties,
+    ui.BIM_PT_aggregate,
+)
+
+
+def register():
+    bpy.types.Object.BIMObjectAggregateProperties = bpy.props.PointerProperty(type=prop.BIMObjectAggregateProperties)
+
+
+def unregister():
+    del bpy.types.Object.BIMObjectAggregateProperties
@@ -0,0 +1,55 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import blenderbim.tool as tool
+import ifcopenshell.util.element
+
+
+def refresh():
+    AggregateData.is_loaded = False
+
+
+class AggregateData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {
+            "has_aggregate": cls.has_aggregate(),
+            "label": cls.get_label(),
+            "relating_object_id": cls.get_relating_object_id(),
+        }
+        cls.is_loaded = True
+
+    @classmethod
+    def has_aggregate(cls):
+        return ifcopenshell.util.element.get_aggregate(tool.Ifc.get_entity(bpy.context.active_object))
+
+    @classmethod
+    def get_label(cls):
+        aggregate = ifcopenshell.util.element.get_aggregate(tool.Ifc.get_entity(bpy.context.active_object))
+        if aggregate:
+            return f"{aggregate.is_a()}/{aggregate.Name or ''}"
+
+    @classmethod
+    def get_relating_object_id(cls):
+        aggregate = ifcopenshell.util.element.get_aggregate(tool.Ifc.get_entity(bpy.context.active_object))
+        if aggregate:
+            return aggregate.id()
@@ -0,0 +1,128 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import ifcopenshell
+import ifcopenshell.util.element
+import blenderbim.tool as tool
+import blenderbim.core.aggregate as core
+import blenderbim.core.spatial
+import blenderbim.bim.handler
+from blenderbim.bim.ifc import IfcStore
+
+
+class Operator:
+    def execute(self, context):
+        IfcStore.execute_ifc_operator(self, context)
+        blenderbim.bim.handler.refresh_ui_data()
+        return {"FINISHED"}
+
+
+class AssignObject(bpy.types.Operator, Operator):
+    bl_idname = "bim.assign_object"
+    bl_label = "Assign Object"
+    bl_options = {"REGISTER", "UNDO"}
+    relating_object: bpy.props.IntProperty()
+    related_object: bpy.props.IntProperty()
+
+    def _execute(self, context):
+        core.assign_object(
+            tool.Ifc,
+            tool.Aggregate,
+            tool.Collector,
+            relating_obj=tool.Ifc.get_object(tool.Ifc.get().by_id(self.relating_object)),
+            related_obj=tool.Ifc.get_object(tool.Ifc.get().by_id(self.related_object)),
+        )
+
+
+class UnassignObject(bpy.types.Operator, Operator):
+    bl_idname = "bim.unassign_object"
+    bl_label = "Unassign Object"
+    bl_options = {"REGISTER", "UNDO"}
+    relating_object: bpy.props.IntProperty()
+    related_object: bpy.props.IntProperty()
+
+    def _execute(self, context):
+        core.unassign_object(
+            tool.Ifc,
+            tool.Collector,
+            relating_obj=tool.Ifc.get_object(tool.Ifc.get().by_id(self.relating_object)),
+            related_obj=tool.Ifc.get_object(tool.Ifc.get().by_id(self.related_object)),
+        )
+
+
+class EnableEditingAggregate(bpy.types.Operator, Operator):
+    bl_idname = "bim.enable_editing_aggregate"
+    bl_label = "Enable Editing Aggregate"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        core.enable_editing_aggregate(tool.Aggregate, obj=context.active_object)
+
+
+class DisableEditingAggregate(bpy.types.Operator, Operator):
+    bl_idname = "bim.disable_editing_aggregate"
+    bl_label = "Disable Editing Aggregate"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        core.disable_editing_aggregate(tool.Aggregate, obj=context.active_object)
+
+
+class AddAggregate(bpy.types.Operator):
+    bl_idname = "bim.add_aggregate"
+    bl_label = "Add Aggregate"
+    bl_options = {"REGISTER", "UNDO"}
+    obj: bpy.props.StringProperty()
+
+    def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
+        obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
+        element = tool.Ifc.get_entity(obj)
+        if not element:
+            return {"FINISHED"}
+
+        aggregate_collection = bpy.data.collections.new("IfcElementAssembly/Assembly")
+        context.scene.collection.children.link(aggregate_collection)
+        aggregate = bpy.data.objects.new("Assembly", None)
+        aggregate_collection.objects.link(aggregate)
+        bpy.ops.bim.assign_class(obj=aggregate.name, ifc_class="IfcElementAssembly")
+
+        tool.Collector.sync(obj)
+        current_aggregate = ifcopenshell.util.element.get_aggregate(element)
+        current_container = ifcopenshell.util.element.get_container(element)
+        if current_aggregate:
+            core.assign_object(
+                tool.Ifc,
+                tool.Aggregate,
+                tool.Collector,
+                relating_obj=tool.Ifc.get_object(current_aggregate),
+                related_obj=aggregate,
+            )
+        elif current_container:
+            blenderbim.core.spatial.assign_container(
+                tool.Ifc,
+                tool.Collector,
+                tool.Spatial,
+                structure_obj=tool.Ifc.get_object(current_container),
+                element_obj=aggregate,
+            )
+        core.assign_object(tool.Ifc, tool.Aggregate, tool.Collector, relating_obj=aggregate, related_obj=obj)
+        return {"FINISHED"}
@@ -0,0 +1,37 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+from blenderbim.bim.prop import StrProperty, Attribute
+from blenderbim.bim.module.spatial.data import SpatialData
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+
+class BIMObjectAggregateProperties(PropertyGroup):
+    is_editing: BoolProperty(name="Is Editing")
+    relating_object: PointerProperty(name="Aggregate", type=bpy.types.Object)
@@ -0,0 +1,71 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+from bpy.types import Panel
+from blenderbim.bim.module.aggregate.data import AggregateData
+from blenderbim.bim.ifc import IfcStore
+
+
+class BIM_PT_aggregate(Panel):
+    bl_label = "IFC Aggregates"
+    bl_idname = "BIM_PT_aggregate"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+
+    @classmethod
+    def poll(cls, context):
+        if not context.active_object:
+            return False
+        props = context.active_object.BIMObjectProperties
+        if not props.ifc_definition_id:
+            return False
+        if not IfcStore.get_element(props.ifc_definition_id):
+            return False
+        if not IfcStore.get_file().by_id(props.ifc_definition_id).is_a("IfcObjectDefinition"):
+            return False
+        return True
+
+    def draw(self, context):
+        if not AggregateData.is_loaded:
+            AggregateData.load()
+
+        props = context.active_object.BIMObjectAggregateProperties
+
+        if props.is_editing:
+            row = self.layout.row(align=True)
+            row.prop(props, "relating_object", text="")
+            if props.relating_object:
+                op = row.operator("bim.assign_object", icon="CHECKMARK", text="")
+                op.relating_object = props.relating_object.BIMObjectProperties.ifc_definition_id
+                op.related_object = context.active_object.BIMObjectProperties.ifc_definition_id
+            row.operator("bim.disable_editing_aggregate", icon="CANCEL", text="")
+        else:
+            row = self.layout.row(align=True)
+            if AggregateData.data["has_aggregate"]:
+                row.label(text=AggregateData.data["label"])
+                row.operator("bim.enable_editing_aggregate", icon="GREASEPENCIL", text="")
+                row.operator("bim.add_aggregate", icon="ADD", text="")
+                op = row.operator("bim.unassign_object", icon="X", text="")
+                op.relating_object = AggregateData.data["relating_object_id"]
+                op.related_object = context.active_object.BIMObjectProperties.ifc_definition_id
+            else:
+                row.label(text="No Aggregate Found")
+                row.operator("bim.enable_editing_aggregate", icon="GREASEPENCIL", text="")
+                row.operator("bim.add_aggregate", icon="ADD", text="")
@@ -0,0 +1,41 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+from . import ui, prop, operator
+
+classes = (
+    operator.EnableEditingAttributes,
+    operator.DisableEditingAttributes,
+    operator.EditAttributes,
+    operator.GenerateGlobalId,
+    operator.CopyAttributeToSelection,
+    prop.BIMAttributeProperties,
+    ui.BIM_PT_object_attributes,
+    ui.BIM_PT_material_attributes,
+)
+
+
+def register():
+    bpy.types.Object.BIMAttributeProperties = bpy.props.PointerProperty(type=prop.BIMAttributeProperties)
+    bpy.types.Material.BIMAttributeProperties = bpy.props.PointerProperty(type=prop.BIMAttributeProperties)
+
+
+def unregister():
+    del bpy.types.Object.BIMAttributeProperties
+    del bpy.types.Material.BIMAttributeProperties
@@ -0,0 +1,74 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import ifcopenshell
+import blenderbim.tool as tool
+
+
+def refresh():
+    AttributesData.is_loaded = False
+    MaterialAttributesData.is_loaded = False
+
+
+class AttributesData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {"attributes": cls.attributes()}
+        cls.is_loaded = True
+
+    @classmethod
+    def attributes(cls):
+        results = []
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        data = element.get_info()
+        if hasattr(element, "GlobalId"):
+            excluded_keys = ["id", "type"]
+        else:
+            excluded_keys = ["type"]
+        for key, value in data.items():
+            if value is None or isinstance(value, ifcopenshell.entity_instance) or key in excluded_keys:
+                continue
+            if key == "id":
+                key = "STEP ID"
+            results.append({"name": key, "value": str(value)})
+        return results
+
+
+class MaterialAttributesData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {"attributes": cls.attributes()}
+        cls.is_loaded = True
+
+    @classmethod
+    def attributes(cls):
+        results = []
+        element = tool.Ifc.get_entity(bpy.context.active_object.active_material)
+        data = element.get_info()
+        for key, value in data.items():
+            if value is None or isinstance(value, ifcopenshell.entity_instance) or key in ["id", "type"]:
+                continue
+            results.append({"name": key, "value": str(value)})
+        return results
@@ -1,14 +1,44 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
 import bpy
 import json
 import ifcopenshell
-import blenderbim.bim.module.attribute.edit_attributes as edit_attributes
+import ifcopenshell.api
+import blenderbim.bim.helper
+import blenderbim.bim.handler
+import blenderbim.tool as tool
+import blenderbim.core.attribute as core
 from blenderbim.bim.ifc import IfcStore
-from blenderbim.bim.module.attribute.data import Data
+from ifcopenshell.api.attribute.data import Data
+
+
+class Operator:
+    def execute(self, context):
+        IfcStore.execute_ifc_operator(self, context)
+        blenderbim.bim.handler.refresh_ui_data()
+        return {"FINISHED"}


 class EnableEditingAttributes(bpy.types.Operator):
    bl_idname = "bim.enable_editing_attributes"
    bl_label = "Enable Editing Attributes"
+    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
    obj_type: bpy.props.StringProperty()

@@ -20,24 +50,10 @@ class EnableEditingAttributes(bpy.types.Operator):
            obj = bpy.data.materials.get(self.obj)
        oprops = obj.BIMObjectProperties
        props = obj.BIMAttributeProperties
-        while len(props.attributes) > 0:
-            props.attributes.remove(0)
-        for attribute in Data.products[oprops.ifc_definition_id]:
-            new = props.attributes.add()
-            if attribute["type"] == "entity":
-                continue
-            new.name = attribute["name"]
-            new.is_null = attribute["is_null"]
-            if attribute["type"] == "string" or attribute["type"] == "list":
-                new.string_value = attribute["value"] or ""
-            elif attribute["type"] == "integer":
-                new.int_value = attribute["value"] or 0
-            elif attribute["type"] == "float":
-                new.float_value = attribute["value"] or 0.
-            elif attribute["type"] == "enum":
-                new.enum_items = json.dumps(attribute["enum_items"])
-                if attribute["value"]:
-                    new.enum_value = attribute["value"]
+        props.attributes.clear()
+        if oprops.ifc_definition_id not in Data.products:
+            Data.load(IfcStore.get_file(), oprops.ifc_definition_id)
+        blenderbim.bim.helper.import_attributes2(tool.Ifc.get().by_id(oprops.ifc_definition_id), props.attributes)
        props.is_editing_attributes = True
        return {"FINISHED"}

@@ -45,6 +61,7 @@ class EnableEditingAttributes(bpy.types.Operator):
 class DisableEditingAttributes(bpy.types.Operator):
    bl_idname = "bim.disable_editing_attributes"
    bl_label = "Disable Editing Attributes"
+    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
    obj_type: bpy.props.StringProperty()

@@ -58,13 +75,14 @@ class DisableEditingAttributes(bpy.types.Operator):
        return {"FINISHED"}


-class EditAttributes(bpy.types.Operator):
+class EditAttributes(bpy.types.Operator, Operator):
    bl_idname = "bim.edit_attributes"
    bl_label = "Edit Attributes"
+    bl_options = {"REGISTER", "UNDO"}
    obj: bpy.props.StringProperty()
    obj_type: bpy.props.StringProperty()

-    def execute(self, context):
+    def _execute(self, context):
        self.file = IfcStore.get_file()
        if self.obj_type == "Object":
            obj = bpy.data.objects.get(self.obj)
@@ -95,17 +113,8 @@ class EditAttributes(bpy.types.Operator):
            elif attribute["type"] == "enum":
                attributes[attribute["name"]] = blender_attribute.enum_value
        product = self.file.by_id(oprops.ifc_definition_id)
-        edit_attributes.Usecase(self.file, {
-            "product": product,
-            "attributes": attributes
-        }).execute()
-        if "Name" in attributes:
-            new_name = "{}/{}".format(product.is_a(), product.Name or "Unnamed")
-            collection = bpy.data.collections.get(obj.name)
-            if collection:
-                collection.name = new_name
-            obj.name = new_name
-        Data.load(oprops.ifc_definition_id)
+        ifcopenshell.api.run("attribute.edit_attributes", self.file, **{"product": product, "attributes": attributes})
+        Data.load(IfcStore.get_file(), oprops.ifc_definition_id)
        bpy.ops.bim.disable_editing_attributes(obj=obj.name, obj_type=self.obj_type)
        return {"FINISHED"}

@@ -113,14 +122,26 @@ class EditAttributes(bpy.types.Operator):
 class GenerateGlobalId(bpy.types.Operator):
    bl_idname = "bim.generate_global_id"
    bl_label = "Regenerate GlobalId"
+    bl_options = {"REGISTER", "UNDO"}

    def execute(self, context):
-        index = bpy.context.active_object.BIMAttributeProperties.attributes.find("GlobalId")
+        index = context.active_object.BIMAttributeProperties.attributes.find("GlobalId")
        if index >= 0:
-            global_id = bpy.context.active_object.BIMAttributeProperties.attributes[index]
+            global_id = context.active_object.BIMAttributeProperties.attributes[index]
        else:
-            global_id = bpy.context.active_object.BIMAttributeProperties.attributes.add()
+            global_id = context.active_object.BIMAttributeProperties.attributes.add()
        global_id.name = "GlobalId"
        global_id.data_type = "string"
        global_id.string_value = ifcopenshell.guid.new()
        return {"FINISHED"}
+
+
+class CopyAttributeToSelection(bpy.types.Operator, Operator):
+    bl_idname = "bim.copy_attribute_to_selection"
+    bl_label = "Copy Attribute To Selection"
+    name: bpy.props.StringProperty()
+
+    def _execute(self, context):
+        value = context.active_object.BIMAttributeProperties.attributes.get(self.name).get_value()
+        for obj in context.selected_objects:
+            core.copy_attribute_to_selection(tool.Ifc, name=self.name, value=value, obj=obj)
@@ -0,0 +1,37 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.prop import StrProperty, Attribute
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+
+class BIMAttributeProperties(PropertyGroup):
+    attributes: CollectionProperty(name="Attributes", type=Attribute)
+    is_editing_attributes: BoolProperty(name="Is Editing Attributes")
@@ -0,0 +1,96 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import blenderbim.bim.helper
+from bpy.types import Panel
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.attribute.data import AttributesData, MaterialAttributesData
+
+
+def draw_ui(context, layout, obj_type, attributes):
+    obj = context.active_object if obj_type == "Object" else context.active_object.active_material
+    oprops = obj.BIMObjectProperties
+    props = obj.BIMAttributeProperties
+
+    if props.is_editing_attributes:
+        row = layout.row(align=True)
+        op = row.operator("bim.edit_attributes", icon="CHECKMARK", text="Save Attributes")
+        op.obj_type = obj_type
+        op.obj = obj.name
+        op = row.operator("bim.disable_editing_attributes", icon="CANCEL", text="")
+        op.obj_type = obj_type
+        op.obj = obj.name
+
+        blenderbim.bim.helper.draw_attributes(props.attributes, layout, copy_operator="bim.copy_attribute_to_selection")
+    else:
+        row = layout.row()
+        op = row.operator("bim.enable_editing_attributes", icon="GREASEPENCIL", text="Edit")
+        op.obj_type = obj_type
+        op.obj = obj.name
+
+        for attribute in attributes:
+            row = layout.row(align=True)
+            row.label(text=attribute["name"])
+            row.label(text=attribute["value"])
+
+    # TODO: reimplement, see #1222
+    # if "IfcSite/" in context.active_object.name or "IfcBuilding/" in context.active_object.name:
+    #    self.draw_addresses_ui()
+
+
+class BIM_PT_object_attributes(Panel):
+    bl_label = "IFC Attributes"
+    bl_idname = "BIM_PT_object_attributes"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "object"
+
+    @classmethod
+    def poll(cls, context):
+        if not context.active_object:
+            return False
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
+        return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
+
+    def draw(self, context):
+        if not AttributesData.is_loaded:
+            AttributesData.load()
+        draw_ui(context, self.layout, "Object", AttributesData.data["attributes"])
+
+
+class BIM_PT_material_attributes(Panel):
+    bl_label = "IFC Material Attributes"
+    bl_idname = "BIM_PT_material_attributes"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "material"
+
+    @classmethod
+    def poll(cls, context):
+        if not IfcStore.get_file():
+            return False
+        try:
+            return bool(context.active_object.active_material.BIMObjectProperties.ifc_definition_id)
+        except:
+            return False
+
+    def draw(self, context):
+        if not MaterialAttributesData.is_loaded:
+            MaterialAttributesData.load()
+        draw_ui(context, self.layout, "Material", MaterialAttributesData.data["attributes"])
@@ -0,0 +1,36 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+from . import ui, prop, operator
+
+classes = (
+    prop.AuginProperties,
+    ui.BIM_PT_augin,
+    operator.AuginLogin,
+    operator.AuginCreateNewModel,
+    operator.AuginReset,
+)
+
+
+def register():
+    bpy.types.Scene.AuginProperties = bpy.props.PointerProperty(type=prop.AuginProperties)
+
+
+def unregister():
+    del bpy.types.Scene.AuginProperties
@@ -0,0 +1,154 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import bpy
+import json
+import string
+import random
+import shutil
+import requests
+import tempfile
+import datetime
+import addon_utils
+
+
+class AuginLogin(bpy.types.Operator):
+    bl_idname = "bim.augin_login"
+    bl_label = "Login to Augin"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        props = context.scene.AuginProperties
+
+        url = "https://server.auge.pro.br/API/v3/augin_rest.php/user_login"
+        payload = {"email": props.username, "password": props.password}
+        response = requests.request("POST", url, data=payload)
+        result = response.json()
+
+        if result["success_feedback"]["success"]:
+            props.token = result["token"]
+        else:
+            self.report({"ERROR"}, "Login failed :(")
+        return {"FINISHED"}
+
+
+class AuginReset(bpy.types.Operator):
+    bl_idname = "bim.augin_reset"
+    bl_label = "Upload Another Project"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        props = context.scene.AuginProperties
+        props.is_success = False
+        return {"FINISHED"}
+
+
+class AuginCreateNewModel(bpy.types.Operator):
+    bl_idname = "bim.augin_create_new_model"
+    bl_label = "Create New Augin Model"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        import boto3
+        from botocore.config import Config
+
+        props = context.scene.AuginProperties
+
+        # Create project
+        url = "https://server.auge.pro.br/API/v3/augin_rest.php/new_model"
+
+        chars = string.ascii_uppercase + string.ascii_lowercase + string.digits
+        props.project_filename = "BBM{}{}".format(
+            datetime.datetime.now().strftime("%Y%m%d%H%M%S"), "".join(random.choice(chars) for _ in range(6))
+        )
+        addon_version = ".".join(
+            [
+                str(x)
+                for x in [
+                    addon.bl_info.get("version", (-1, -1, -1))
+                    for addon in addon_utils.modules()
+                    if addon.bl_info["name"] == "BlenderBIM"
+                ][0]
+            ]
+        )
+
+        payload = {
+            "user_token": props.token,
+            "partner_token": "Mmf2zpxdgrkHaUNRm6Cv7GLJdBAeb7Rn",
+            "project_name": props.project_name,
+            "model_filename": props.project_filename + ".ifc",
+            "thumb_filename": props.project_filename + ".png",
+            "app_name": "BlenderBIM",
+            "sw_version": bpy.app.version_string,
+            "plugin_version": addon_version,
+        }
+        response = requests.request("POST", url, data=payload)
+        result = response.json()
+
+        # Upload to S3
+        my_config = Config(
+            region_name=result["s3_region"],
+        )
+
+        client = boto3.client(
+            "s3",
+            aws_access_key_id=result["s3_key"],
+            aws_secret_access_key=result["s3_secret"],
+            aws_session_token=result["s3_token"],
+            config=my_config,
+        )
+
+        # Generate thumb
+        old_file_format = context.scene.render.image_settings.file_format
+        old_filepath = context.scene.render.filepath
+
+        cam = bpy.data.cameras.new("Camera")
+        cam_obj = bpy.data.objects.new("Camera", cam)
+        context.scene.collection.objects.link(cam_obj)
+        context.scene.camera = cam_obj
+
+        tmpdir = tempfile.mkdtemp()
+        thumb_path = os.path.join(tmpdir, "thumb.png")
+        context.scene.render.image_settings.file_format = "PNG"
+        context.scene.render.filepath = thumb_path
+        bpy.ops.render.opengl(write_still=True)
+
+        context.scene.render.image_settings.file_format = old_file_format
+        context.scene.render.filepath = old_filepath
+
+        client.upload_file(context.scene.BIMProperties.ifc_file, result["s3_bucket"], result["model_path"])
+        client.upload_file(thumb_path, result["s3_bucket"], result["thumb_path"])
+
+        # Notify done
+        url = "https://server.auge.pro.br/API/v3/augin_rest.php/files_uploaded"
+        payload = {
+            "user_token": props.token,
+            "ifc_filesize": os.path.getsize(context.scene.BIMProperties.ifc_file),
+            "model_filesize": os.path.getsize(context.scene.BIMProperties.ifc_file),
+            "thumb_filesize": os.path.getsize(thumb_path),
+            "model_upload_path": result["model_path"],
+            "thumb_upload_path": result["thumb_path"],
+            "model_id": result["model_id"],
+        }
+        headers = {"Content-Type": "application/x-www-form-urlencoded"}
+        response = requests.request("POST", url, headers=headers, data=payload)
+
+        shutil.rmtree(tmpdir)
+        props.is_success = True
+        return {"FINISHED"}
@@ -0,0 +1,29 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy.props
+import bpy.types
+
+
+class AuginProperties(bpy.types.PropertyGroup):
+    username: bpy.props.StringProperty(name="Username")
+    password: bpy.props.StringProperty(name="Password")
+    token: bpy.props.StringProperty(name="Token")
+    project_name: bpy.props.StringProperty(name="Project Name")
+    project_filename: bpy.props.StringProperty(name="IFC Filename")
+    is_success: bpy.props.BoolProperty(name="Is Successful Upload", default=False)
@@ -0,0 +1,63 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy.types
+
+
+class BIM_PT_augin(bpy.types.Panel):
+    bl_label = "Augin"
+    bl_idname = "BIM_PT_augin"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+
+        scene = context.scene
+        props = scene.AuginProperties
+
+        if not props.token:
+            row = layout.row()
+            row.prop(props, "username")
+            row = layout.row()
+            row.prop(props, "password")
+            row = layout.row()
+            row.operator("bim.augin_login")
+            return
+
+        row = layout.row()
+        row.label(text="Logged in as " + props.username)
+
+        if not context.scene.BIMProperties.ifc_file:
+            row = layout.row()
+            row.label(text="No IFC Found")
+            return
+
+        if props.is_success:
+            row = layout.row()
+            row.label(text="Upload Successful")
+            row = layout.row()
+            row.operator("bim.augin_reset")
+        else:
+            row = layout.row()
+            row.prop(props, "project_name")
+            row = layout.row()
+            row.operator("bim.augin_create_new_model")
@@ -1,3 +1,21 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
 import bpy
 from . import ui, prop, operator

@@ -20,6 +38,7 @@ classes = (
    operator.AddBcfLabel,
    operator.AddBcfRelatedTopic,
    operator.ViewBcfTopic,
+    operator.RemoveBcfTopic,
    operator.RemoveBcfComment,
    operator.RemoveBcfBimSnippet,
    operator.RemoveBcfReferenceLink,
@@ -0,0 +1,30 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bcf
+import bcf.v2.bcfxml
+
+
+class BcfStore:
+    bcfxml = None
+
+    @staticmethod
+    def get_bcfxml():
+        if not BcfStore.bcfxml:
+            BcfStore.bcfxml = bcf.v2.bcfxml.BcfXml()
+        return BcfStore.bcfxml
--- a/Show More
+++ b/Show More