merage master v6.0.0

cmake/CMakeLists.txt

@@ -466,6 +466,10 @@ 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)

nix/build-all.py

@@ -336,7 +336,7 @@ def git_clone_or_pull_repository(clone_url, target_dir, revision=None):
     `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])
+        run([git, "clone", "--recursive", clone_url, target_dir])
     else:
         logger.info("directory '%s' already cloned. Pulling latest changes." % (target_dir,))
 

src/blenderbim/Makefile

@@ -52,10 +52,10 @@ endif
 
 	# Provides IfcOpenShell Python functionality
 ifeq ($(PYVERSION), py37)
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-37-v0.6.0-517b819-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-37-v0.6.0-ff7219b-$(PLATFORM)64.zip
 endif
 ifeq ($(PYVERSION), py39)
-	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-39-v0.6.0-517b819-$(PLATFORM)64.zip
+	cd dist/working && wget https://s3.amazonaws.com/ifcopenshell-builds/ifcblender-python-39-v0.6.0-ff7219b-$(PLATFORM)64.zip
 endif
 	cd dist/working && unzip ifcblender*
 	cp -r dist/working/io_import_scene_ifc/ifcopenshell dist/blenderbim/libs/site/packages/
@@ -142,7 +142,7 @@ endif
 	cd dist/working && unzip v0.6.0.zip
 	# IfcOpenBot sometimes lags behind, so we hotfix the Python utilities
 	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcopenshell-python/ifcopenshell/util/* dist/blenderbim/libs/site/packages/ifcopenshell/util/
-	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcopenshell-python/ifcopenshell/api dist/blenderbim/libs/site/packages/ifcopenshell/api
+	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcopenshell-python/ifcopenshell/api/* dist/blenderbim/libs/site/packages/ifcopenshell/api/
 	# Provides bcf functionality
 	cp -r dist/working/IfcOpenShell-0.6.0/src/bcf/bcf dist/blenderbim/libs/site/packages/
 	# Provides IFCClash functionality

src/blenderbim/blenderbim/bim/__init__.py

@@ -25,6 +25,7 @@ if bpy is not None:
         "geometry": None,
         "cobie": None,
         "sequence": None,
+        "cost": None,
         "group": None,
         "structural": None,
         "material": None,

src/blenderbim/blenderbim/bim/export_ifc.py

@@ -90,7 +90,7 @@ class IfcExporter:
         for guid in to_delete:
             product = self.file.by_id(guid)
             IfcStore.unlink_element(product)
-            ifcopenshell.api.run("remove_product", self.file, **{"product": product})
+            ifcopenshell.api.run("root.remove_product", self.file, **{"product": product})
 
     def sync_edited_objects(self):
         for obj_name in IfcStore.edited_objs.copy():

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -414,7 +414,11 @@ class IfcImporter:
             self.exclude_elements |= self.native_elements
 
     def is_native(self, element):
-        if not element.Representation or not element.Representation.Representations or element.HasOpenings:
+        if (
+            not element.Representation
+            or not element.Representation.Representations
+            or getattr(element, "HasOpenings", None)
+        ):
             return
         representations = self.get_transformed_body_representations(element.Representation.Representations)
 

src/blenderbim/blenderbim/bim/module/geometry/helper.py

@@ -205,7 +205,8 @@ class Helper:
         for edge in bm.edges:
             edge_vector = edge.verts[1].co - edge.verts[0].co
             unshared_verts = set(edge.verts) - face_verts_set
-            if len(unshared_verts) == 1 and not (edge_vector.angle(profile_face.normal) - pi / 2 < 0.001):
+            angle_to_normal = edge_vector.angle(profile_face.normal)
+            if len(unshared_verts) == 1 and (angle_to_normal < 0.001 or angle_to_normal - pi < 0.001):
                 if unshared_verts.pop() == edge.verts[1]:
                     return [edge.verts[0].index, edge.verts[1].index]
                 return [edge.verts[1].index, edge.verts[0].index]

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -398,7 +398,7 @@ class UpdateMeshRepresentation(bpy.types.Operator):
 
         obj.data.BIMMeshProperties.ifc_definition_id = int(new_representation.id())
         obj.data.name = f"{old_representation.ContextOfItems.id()}/{new_representation.id()}"
-        bpy.ops.bim.remove_representation(representation_id=old_representation.id())
+        bpy.ops.bim.remove_representation(representation_id=old_representation.id(), obj=obj.name)
         Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
 
 

src/blenderbim/blenderbim/bim/module/georeference/__init__.py

@@ -5,8 +5,10 @@ classes = (
     operator.EnableEditingGeoreferencing,
     operator.DisableEditingGeoreferencing,
     operator.EditGeoreferencing,
-    operator.SetNorthOffset,
+    operator.SetIfcGridNorth,
-    operator.GetNorthOffset,
+    operator.SetBlenderGridNorth,
+    operator.SetIfcTrueNorth,
+    operator.SetBlenderTrueNorth,
     operator.RemoveGeoreferencing,
     operator.AddGeoreferencing,
     operator.ConvertLocalToGlobal,

src/blenderbim/blenderbim/bim/module/georeference/operator.py

@@ -17,27 +17,6 @@ class EnableEditingGeoreferencing(bpy.types.Operator):
         self.file = IfcStore.get_file()
         props = context.scene.BIMGeoreferenceProperties
 
-        while len(props.map_conversion) > 0:
-            props.map_conversion.remove(0)
-
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcMapConversion").all_attributes():
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            new = props.map_conversion.add()
-            new.name = attribute.name()
-            new.is_null = Data.map_conversion[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = data_type
-            if data_type == "string":
-                new.string_value = "" if new.is_null else Data.map_conversion[attribute.name()]
-            elif data_type == "float":
-                new.float_value = 0.0 if new.is_null else Data.map_conversion[attribute.name()]
-            elif data_type == "integer":
-                new.int_value = 0 if new.is_null else Data.map_conversion[attribute.name()]
-            elif data_type == "boolean":
-                new.bool_value = False if new.is_null else Data.map_conversion[attribute.name()]
-
         while len(props.projected_crs) > 0:
             props.projected_crs.remove(0)
 
@@ -69,6 +48,27 @@ class EnableEditingGeoreferencing(bpy.types.Operator):
             elif props.map_unit_type == "IfcConversionBasedUnit":
                 props.map_unit_imperial = Data.projected_crs["MapUnit"]["Name"]
 
+        while len(props.map_conversion) > 0:
+            props.map_conversion.remove(0)
+
+        for attribute in IfcStore.get_schema().declaration_by_name("IfcMapConversion").all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity" or data_type == "select":
+                continue
+            print(attribute.name(), data_type)
+            new = props.map_conversion.add()
+            new.name = attribute.name()
+            new.is_null = Data.map_conversion[attribute.name()] is None
+            new.is_optional = attribute.optional()
+            # Enforce a string data type to prevent data loss in singpe-precision Blender props
+            new.data_type = "string"
+            new.string_value = "" if new.is_null else str(Data.map_conversion[attribute.name()])
+
+        props.has_true_north = bool(Data.true_north)
+        if Data.true_north:
+            props.true_north_abscissa = str(Data.true_north[0])
+            props.true_north_ordinate = str(Data.true_north[1])
+
         props.is_editing = True
         return {"FINISHED"}
 
@@ -91,23 +91,6 @@ class EditGeoreferencing(bpy.types.Operator):
         self.file = IfcStore.get_file()
         props = context.scene.BIMGeoreferenceProperties
 
-        map_conversion = {}
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcMapConversion").all_attributes():
-            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
-                continue
-            blender_attribute = props.map_conversion.get(attribute.name())
-            if blender_attribute.is_null:
-                map_conversion[attribute.name()] = None
-            elif blender_attribute.data_type == "string":
-                map_conversion[attribute.name()] = blender_attribute.string_value
-            elif blender_attribute.data_type == "float":
-                map_conversion[attribute.name()] = blender_attribute.float_value
-            elif blender_attribute.data_type == "integer":
-                map_conversion[attribute.name()] = blender_attribute.int_value
-            elif blender_attribute.data_type == "boolean":
-                map_conversion[attribute.name()] = blender_attribute.bool_value
-
         projected_crs = {}
         for attribute in IfcStore.get_schema().declaration_by_name("IfcProjectedCRS").all_attributes():
             data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
@@ -129,38 +112,87 @@ class EditGeoreferencing(bpy.types.Operator):
         if not props.is_map_unit_null:
             map_unit = props.map_unit_si if props.map_unit_type == "IfcSIUnit" else props.map_unit_imperial
 
+        map_conversion = {}
+        for attribute in IfcStore.get_schema().declaration_by_name("IfcMapConversion").all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity" or data_type == "select":
+                continue
+            blender_attribute = props.map_conversion.get(attribute.name())
+            if blender_attribute.is_null:
+                map_conversion[attribute.name()] = None
+            elif blender_attribute.data_type == "string":
+                # We store our floats as string to prevent single precision data loss
+                map_conversion[attribute.name()] = float(blender_attribute.string_value)
+
+        true_north = None
+        if props.has_true_north:
+            try:
+                true_north = [float(props.true_north_abscissa), float(props.true_north_ordinate)]
+            except:
+                pass
+
         ifcopenshell.api.run(
             "georeference.edit_georeferencing",
             self.file,
-            **{"map_conversion": map_conversion, "projected_crs": projected_crs, "map_unit": map_unit}
+            **{
+                "map_conversion": map_conversion,
+                "projected_crs": projected_crs,
+                "map_unit": map_unit,
+                "true_north": true_north,
+            }
         )
         Data.load(IfcStore.get_file())
         bpy.ops.bim.disable_editing_georeferencing()
         return {"FINISHED"}
 
 
-class SetNorthOffset(bpy.types.Operator):
+class SetBlenderGridNorth(bpy.types.Operator):
-    bl_idname = "bim.set_north_offset"
+    bl_idname = "bim.set_blender_grid_north"
-    bl_label = "Set North Offset"
+    bl_label = "Set Blender Grid North"
 
     def execute(self, context):
         context.scene.sun_pos_properties.north_offset = -radians(
-            ifcopenshell.util.geolocation.xy2angle(
+            ifcopenshell.util.geolocation.xaxis2angle(
-                context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisAbscissa").float_value,
+                float(context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisAbscissa").string_value),
-                context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisOrdinate").float_value,
+                float(context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisOrdinate").string_value),
             )
         )
         return {"FINISHED"}
 
 
-class GetNorthOffset(bpy.types.Operator):
+class SetIfcGridNorth(bpy.types.Operator):
-    bl_idname = "bim.get_north_offset"
+    bl_idname = "bim.set_ifc_grid_north"
-    bl_label = "Get North Offset"
+    bl_label = "Set IFC Grid North"
 
     def execute(self, context):
         x_angle = -context.scene.sun_pos_properties.north_offset
-        context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisAbscissa").float_value = cos(x_angle)
+        context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisAbscissa").string_value = str(cos(x_angle))
-        context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisOrdinate").float_value = sin(x_angle)
+        context.scene.BIMGeoreferenceProperties.map_conversion.get("XAxisOrdinate").string_value = str(sin(x_angle))
+        return {"FINISHED"}
+
+
+class SetBlenderTrueNorth(bpy.types.Operator):
+    bl_idname = "bim.set_blender_true_north"
+    bl_label = "Set Blender True North"
+
+    def execute(self, context):
+        context.scene.sun_pos_properties.north_offset = -radians(
+            ifcopenshell.util.geolocation.yaxis2angle(
+                float(context.scene.BIMGeoreferenceProperties.true_north_abscissa),
+                float(context.scene.BIMGeoreferenceProperties.true_north_ordinate),
+            )
+        )
+        return {"FINISHED"}
+
+
+class SetIfcTrueNorth(bpy.types.Operator):
+    bl_idname = "bim.set_ifc_true_north"
+    bl_label = "Set IFC True North"
+
+    def execute(self, context):
+        y_angle = -context.scene.sun_pos_properties.north_offset + radians(90)
+        context.scene.BIMGeoreferenceProperties.true_north_abscissa = str(cos(y_angle))
+        context.scene.BIMGeoreferenceProperties.true_north_ordinate = str(sin(y_angle))
         return {"FINISHED"}
 
 

src/blenderbim/blenderbim/bim/module/georeference/prop.py

@@ -46,3 +46,6 @@ class BIMGeoreferenceProperties(PropertyGroup):
     blender_orthogonal_height: StringProperty(name="Blender Orthogonal Height", default="0")
     blender_x_axis_abscissa: StringProperty(name="Blender X Axis Abscissa", default="1")
     blender_x_axis_ordinate: StringProperty(name="Blender X Axis Ordinate", default="0")
+    has_true_north: BoolProperty(name="Has True North", default=True)
+    true_north_abscissa: StringProperty(name="True North Abscissa")
+    true_north_ordinate: StringProperty(name="True North Ordinate")

src/blenderbim/blenderbim/bim/module/georeference/ui.py

@@ -1,7 +1,9 @@
+import ifcopenshell.util.geolocation
 from bpy.types import Panel
 from ifcopenshell.api.georeference.data import Data
 from blenderbim.bim.ifc import IfcStore
 
+
 class BIM_PT_gis(Panel):
     bl_label = "IFC Georeferencing"
     bl_idname = "BIM_PT_gis"
@@ -15,6 +17,8 @@ class BIM_PT_gis(Panel):
         return IfcStore.get_file()
 
     def draw(self, context):
+        self.layout.use_property_split = True
+        self.layout.use_property_decorate = False
         props = context.scene.BIMGeoreferenceProperties
         if not Data.is_loaded:
             Data.load(IfcStore.get_file())
@@ -26,30 +30,10 @@ class BIM_PT_gis(Panel):
     def draw_editable_ui(self, context):
         props = context.scene.BIMGeoreferenceProperties
         row = self.layout.row(align=True)
-        row.label(text="Map Conversion", icon="GRID")
+        row.label(text="Projected CRS", icon="WORLD")
         row.operator("bim.edit_georeferencing", icon="CHECKMARK", text="")
         row.operator("bim.disable_editing_georeferencing", icon="X", text="")
 
-        for attribute in props.map_conversion:
-            if attribute.name == "XAxisAbscissa" and hasattr(context.scene, "sun_pos_properties"):
-                row = self.layout.row(align=True)
-                row.operator("bim.get_north_offset", text="Set IFC North")
-                row.operator("bim.set_north_offset", text="Set Blender North")
-            row = self.layout.row(align=True)
-            if attribute.data_type == "string":
-                row.prop(attribute, "string_value", text=attribute.name)
-            elif attribute.data_type == "integer":
-                row.prop(attribute, "int_value", text=attribute.name)
-            elif attribute.data_type == "float":
-                row.prop(attribute, "float_value", text=attribute.name)
-            elif attribute.data_type == "boolean":
-                row.prop(attribute, "bool_value", text=attribute.name)
-            if attribute.is_optional:
-                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
-
-        row = self.layout.row(align=True)
-        row.label(text="Projected CRS", icon="WORLD")
-
         for attribute in props.projected_crs:
             row = self.layout.row(align=True)
             if attribute.data_type == "string":
@@ -70,10 +54,43 @@ class BIM_PT_gis(Panel):
             row.prop(props, "map_unit_imperial", text="")
         row.prop(props, "is_map_unit_null", icon="RADIOBUT_OFF" if props.is_map_unit_null else "RADIOBUT_ON", text="")
 
+        row = self.layout.row()
+        row.label(text="Map Conversion", icon="GRID")
+
+        for attribute in props.map_conversion:
+            if attribute.name == "Scale" and hasattr(context.scene, "sun_pos_properties"):
+                row = self.layout.row(align=True)
+                row.operator("bim.set_ifc_grid_north", text="Set IFC North")
+                row.operator("bim.set_blender_grid_north", text="Set Blender North")
+            row = self.layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "float":
+                row.prop(attribute, "float_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+        row = self.layout.row()
+        row.label(text="True North", icon="LIGHT_SUN")
+        row = self.layout.row()
+        row.prop(props, "has_true_north")
+        row = self.layout.row()
+        row.prop(props, "true_north_abscissa")
+        row = self.layout.row()
+        row.prop(props, "true_north_ordinate")
+        if hasattr(context.scene, "sun_pos_properties"):
+            row = self.layout.row(align=True)
+            row.operator("bim.set_ifc_true_north", text="Set IFC North")
+            row.operator("bim.set_blender_true_north", text="Set Blender North")
+
     def draw_ui(self, context):
         props = context.scene.BIMGeoreferenceProperties
 
-        if not Data.map_conversion and IfcStore.get_file().schema != "IFC2X3":
+        if not Data.projected_crs and IfcStore.get_file().schema != "IFC2X3":
             row = self.layout.row(align=True)
             row.label(text="Not Georeferenced")
             row.operator("bim.add_georeferencing", icon="ADD", text="")
@@ -100,26 +117,26 @@ class BIM_PT_gis(Panel):
             row = self.layout.row(align=True)
             row.label(text="XAxisOrdinate")
             row.label(text=props.blender_x_axis_ordinate)
+            row.label(text="Derived Grid North")
+            row.label(
+                text=str(
+                    round(
+                        ifcopenshell.util.geolocation.xaxis2angle(
+                            float(props.blender_x_axis_abscissa), float(props.blender_x_axis_ordinate)
+                        ),
+                        3,
+                    )
+                )
+            )
         elif IfcStore.get_file().schema == "IFC2X3":
             row = self.layout.row()
             row.label(text="Not Georeferenced")
 
-        if Data.map_conversion:
-            row = self.layout.row(align=True)
-            row.label(text="Map Conversion", icon="GRID")
-            row.operator("bim.enable_editing_georeferencing", icon="GREASEPENCIL", text="")
-            row.operator("bim.remove_georeferencing", icon="X", text="")
-
-        for key, value in Data.map_conversion.items():
-            if key == "id" or key == "type" or key == "SourceCRS" or key == "TargetCRS" or not value:
-                continue
-            row = self.layout.row(align=True)
-            row.label(text=key)
-            row.label(text=str(value))
-
         if Data.projected_crs:
             row = self.layout.row(align=True)
             row.label(text="Projected CRS", icon="WORLD")
+            row.operator("bim.enable_editing_georeferencing", icon="GREASEPENCIL", text="")
+            row.operator("bim.remove_georeferencing", icon="X", text="")
 
         for key, value in Data.projected_crs.items():
             if key == "id" or key == "type" or not value:
@@ -132,6 +149,40 @@ class BIM_PT_gis(Panel):
             row.label(text=key)
             row.label(text=str(value))
 
+        if Data.map_conversion:
+            row = self.layout.row(align=True)
+            row.label(text="Map Conversion", icon="GRID")
+
+        for key, value in Data.map_conversion.items():
+            if key == "id" or key == "type" or key == "SourceCRS" or key == "TargetCRS" or value is None:
+                continue
+            row = self.layout.row(align=True)
+            row.label(text=key)
+            row.label(text=str(value))
+            if key == "XAxisOrdinate":
+                row = self.layout.row(align=True)
+                row.label(text="Derived Angle")
+                row.label(
+                    text=str(
+                        round(
+                            ifcopenshell.util.geolocation.xaxis2angle(
+                                Data.map_conversion["XAxisAbscissa"], Data.map_conversion["XAxisOrdinate"]
+                            ),
+                            3,
+                        )
+                    )
+                )
+
+        if Data.true_north:
+            row = self.layout.row()
+            row.label(text="True North", icon="LIGHT_SUN")
+            row = self.layout.row(align=True)
+            row.label(text="Vector")
+            row.label(text=str(Data.true_north[0:2])[1:-1])
+            row = self.layout.row(align=True)
+            row.label(text="Derived Angle")
+            row.label(text=str(round(ifcopenshell.util.geolocation.yaxis2angle(*Data.true_north[0:2]), 3)))
+
 
 class BIM_PT_gis_utilities(Panel):
     bl_idname = "BIM_PT_gis_utilities"

src/blenderbim/blenderbim/bim/module/layer/operator.py

@@ -47,7 +47,7 @@ class EnableEditingLayer(bpy.types.Operator):
 
         for attribute in IfcStore.get_schema().declaration_by_name("IfcPresentationLayerAssignment").all_attributes():
             data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
-            if data_type == "entity":
+            if data_type == "entity" or data_type == "select":
                 continue
             new = props.layer_attributes.add()
             new.name = attribute.name()

src/blenderbim/blenderbim/bim/module/material/__init__.py

@@ -8,6 +8,9 @@ classes = (
     operator.UnassignMaterial,
     operator.AddConstituent,
     operator.RemoveConstituent,
+    operator.AddProfile,
+    operator.RemoveProfile,
+    operator.AssignParameterizedProfile,
     operator.AddLayer,
     operator.RemoveLayer,
     operator.ReorderMaterialSetItem,

src/blenderbim/blenderbim/bim/module/material/operator.py

@@ -1,8 +1,36 @@
 import bpy
+import json
 import ifcopenshell.api
 import ifcopenshell.util.attribute
 from blenderbim.bim.ifc import IfcStore
 from ifcopenshell.api.material.data import Data
+from ifcopenshell.api.profile.data import Data as ProfileData
+
+
+class AssignParameterizedProfile(bpy.types.Operator):
+    bl_idname = "bim.assign_parameterized_profile"
+    bl_label = "Assign Parameterized Profile"
+    ifc_class: bpy.props.StringProperty()
+    material_profile: bpy.props.IntProperty()
+    obj: bpy.props.StringProperty()
+
+    def execute(self, context):
+        obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
+        self.file = IfcStore.get_file()
+        profile = ifcopenshell.api.run(
+            "profile.add_parameterized_profile",
+            self.file,
+            **{"ifc_class": self.ifc_class},
+        )
+        ifcopenshell.api.run(
+            "material.assign_profile",
+            self.file,
+            **{"material_profile": self.file.by_id(self.material_profile), "profile": profile}
+        )
+        Data.load_profiles()
+        ProfileData.load(self.file)
+        bpy.ops.bim.enable_editing_material_set_item(obj=obj.name, material_set_item=self.material_profile)
+        return {"FINISHED"}
 
 
 class AddMaterial(bpy.types.Operator):
@@ -115,6 +143,43 @@ class RemoveConstituent(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class AddProfile(bpy.types.Operator):
+    bl_idname = "bim.add_profile"
+    bl_label = "Add Profile"
+    obj: bpy.props.StringProperty()
+    profile_set: bpy.props.IntProperty()
+
+    def execute(self, context):
+        obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "material.add_profile",
+            self.file,
+            **{
+                "profile_set": self.file.by_id(self.profile_set),
+                "material": self.file.by_id(int(obj.BIMObjectMaterialProperties.material)),
+            },
+        )
+        Data.load_profiles()
+        return {"FINISHED"}
+
+
+class RemoveProfile(bpy.types.Operator):
+    bl_idname = "bim.remove_profile"
+    bl_label = "Remove Profile"
+    obj: bpy.props.StringProperty()
+    profile: bpy.props.IntProperty()
+
+    def execute(self, context):
+        obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "material.remove_profile", self.file, **{"profile": self.file.by_id(self.profile)}
+        )
+        Data.load_profiles()
+        return {"FINISHED"}
+
+
 class AddLayer(bpy.types.Operator):
     bl_idname = "bim.add_layer"
     bl_label = "Add Layer"
@@ -333,8 +398,8 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
     def execute(self, context):
         self.file = IfcStore.get_file()
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
-        props = obj.BIMObjectMaterialProperties
+        self.props = obj.BIMObjectMaterialProperties
-        props.active_material_set_item_id = self.material_set_item
+        self.props.active_material_set_item_id = self.material_set_item
         product_data = Data.products[obj.BIMObjectProperties.ifc_definition_id]
         material_set_item = self.file.by_id(self.material_set_item)
 
@@ -347,17 +412,24 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
         else:
             material_set_item_data = {}
 
-        props.material_set_item_material = str(material_set_item_data["Material"])
+        self.props.material_set_item_material = str(material_set_item_data["Material"])
 
-        while len(props.material_set_item_attributes) > 0:
+        self.load_set_item_attributes(material_set_item, material_set_item_data)
-            props.material_set_item_attributes.remove(0)
+        if material_set_item.is_a("IfcMaterialProfile"):
+            self.load_profile_attributes(material_set_item, material_set_item_data)
+
+        return {"FINISHED"}
+
+    def load_set_item_attributes(self, material_set_item, material_set_item_data):
+        while len(self.props.material_set_item_attributes) > 0:
+            self.props.material_set_item_attributes.remove(0)
 
         for attribute in IfcStore.get_schema().declaration_by_name(material_set_item.is_a()).all_attributes():
             data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
             if data_type == "entity":
                 continue
             if attribute.name() in material_set_item_data:
-                new = props.material_set_item_attributes.add()
+                new = self.props.material_set_item_attributes.add()
                 new.name = attribute.name()
                 new.is_null = material_set_item_data[attribute.name()] is None
                 new.data_type = data_type
@@ -369,7 +441,45 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
                     new.int_value = 0 if new.is_null else material_set_item_data[attribute.name()]
                 elif data_type == "boolean":
                     new.bool_value = False if new.is_null else material_set_item_data[attribute.name()]
-        return {"FINISHED"}
+
+    def load_profile_attributes(self, material_set_item, material_set_item_data):
+        while len(self.props.material_set_item_profile_attributes) > 0:
+            self.props.material_set_item_profile_attributes.remove(0)
+
+        if not material_set_item_data["Profile"]:
+            return
+
+        profile = self.file.by_id(material_set_item_data["Profile"])
+        profile_data = ProfileData.profiles[material_set_item_data["Profile"]]
+
+        for attribute in IfcStore.get_schema().declaration_by_name(profile.is_a()).all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity":
+                continue
+            if attribute.name() in profile_data:
+                new = self.props.material_set_item_profile_attributes.add()
+                new.name = attribute.name()
+                new.is_null = profile_data[attribute.name()] is None
+                new.is_optional = attribute.optional()
+                new.data_type = data_type
+                if data_type == "string":
+                    new.string_value = "" if new.is_null else profile_data[attribute.name()]
+                elif data_type == "float":
+                    new.float_value = 0.0 if new.is_null else profile_data[attribute.name()]
+                elif data_type == "integer":
+                    new.int_value = 0 if new.is_null else profile_data[attribute.name()]
+                elif data_type == "boolean":
+                    new.bool_value = False if new.is_null else profile_data[attribute.name()]
+                elif data_type == "enum":
+                    new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
+                    if profile_data[attribute.name()]:
+                        new.enum_value = profile_data[attribute.name()]
+
+                # Force null to be false if the attribute is mandatory because when we first assign a profile, all of
+                # its fields are null (which is illegal).
+                # TODO: find a better solution.
+                if not new.is_optional:
+                    new.is_null = False
 
 
 class DisableEditingMaterialSetItem(bpy.types.Operator):
@@ -431,16 +541,31 @@ class EditMaterialSetItem(bpy.types.Operator):
             )
             Data.load_layers()
         elif product_data["type"] == "IfcMaterialProfileSet":
+            profile_attributes = {}
+            for attribute in props.material_set_item_profile_attributes:
+                if attribute.data_type == "string":
+                    value = attribute.string_value
+                elif attribute.data_type == "float":
+                    value = attribute.float_value
+                elif attribute.data_type == "integer":
+                    value = attribute.int_value
+                elif attribute.data_type == "boolean":
+                    value = attribute.bool_value
+                elif attribute.data_type == "enum":
+                    value = attribute.enum_value
+                profile_attributes[attribute.name] = None if attribute.is_null else value
             ifcopenshell.api.run(
                 "material.edit_profile",
                 self.file,
                 **{
                     "profile": self.file.by_id(self.material_set_item),
                     "attributes": attributes,
+                    "profile_attributes": profile_attributes,
                     "material": self.file.by_id(int(obj.BIMObjectMaterialProperties.material_set_item_material)),
                 },
             )
             Data.load_profiles()
+            ProfileData.load(self.file)
         else:
             pass
 

src/blenderbim/blenderbim/bim/module/material/prop.py

@@ -1,5 +1,5 @@
 import bpy
-import blenderbim.bim.schema # refactor
+import blenderbim.bim.schema  # refactor
 from ifcopenshell.api.material.data import Data
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty, Attribute
@@ -17,6 +17,29 @@ from bpy.props import (
 
 materials_enum = []
 materialtypes_enum = []
+profileclasses_enum = []
+parameterizedprofileclasses_enum = []
+
+
+def getProfileClasses(self, context):
+    global profileclasses_enum
+    if len(profileclasses_enum) == 0 and IfcStore.get_schema():
+        profileclasses_enum.clear()
+        profileclasses_enum = [
+            (t.name(), t.name(), "") for t in IfcStore.get_schema().declaration_by_name("IfcProfileDef").subtypes()
+        ]
+    return profileclasses_enum
+
+
+def getParameterizedProfileClasses(self, context):
+    global parameterizedprofileclasses_enum
+    if len(parameterizedprofileclasses_enum) == 0 and IfcStore.get_schema():
+        parameterizedprofileclasses_enum.clear()
+        parameterizedprofileclasses_enum = [
+            (t.name(), t.name(), "")
+            for t in IfcStore.get_schema().declaration_by_name("IfcParameterizedProfileDef").subtypes()
+        ]
+    return parameterizedprofileclasses_enum
 
 
 def getMaterials(self, context):
@@ -52,4 +75,9 @@ class BIMObjectMaterialProperties(PropertyGroup):
     material_set_attributes: CollectionProperty(name="Material Set Attributes", type=Attribute)
     active_material_set_item_id: IntProperty(name="Active Material Set ID")
     material_set_item_attributes: CollectionProperty(name="Material Set Item Attributes", type=Attribute)
+    material_set_item_profile_attributes: CollectionProperty(name="Material Set Item Profile Attributes", type=Attribute)
     material_set_item_material: EnumProperty(items=getMaterials, name="Material")
+    profile_classes: EnumProperty(items=getProfileClasses, name="Profile Classes")
+    parameterized_profile_classes: EnumProperty(
+        items=getParameterizedProfileClasses, name="Parameterized Profile Classes"
+    )

src/blenderbim/blenderbim/bim/module/material/ui.py

@@ -1,5 +1,6 @@
 from bpy.types import Panel
 from ifcopenshell.api.material.data import Data
+from ifcopenshell.api.profile.data import Data as ProfileData
 from blenderbim.bim.ifc import IfcStore
 
 
@@ -46,6 +47,8 @@ class BIM_PT_object_material(Panel):
             Data.load(IfcStore.get_file())
         if self.oprops.ifc_definition_id not in Data.products:
             Data.load(IfcStore.get_file(), self.oprops.ifc_definition_id)
+        if not ProfileData.is_loaded:
+            ProfileData.load(self.file)
         self.product_data = Data.products[self.oprops.ifc_definition_id]
 
         if not Data.materials:
@@ -172,6 +175,39 @@ class BIM_PT_object_material(Panel):
                 row.prop(attribute, "bool_value", text=attribute.name)
             row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
 
+        if self.set_item_name == "profile":
+            self.draw_assign_profile_ui(box, item)
+            self.draw_editable_profile_ui(box, item)
+
+    def draw_assign_profile_ui(self, layout, item):
+        row = layout.row(align=True)
+        row.prop(self.props, "profile_classes", text="")
+        if self.props.profile_classes == "IfcParameterizedProfileDef":
+            row.prop(self.props, "parameterized_profile_classes", text="")
+            op = row.operator("bim.assign_parameterized_profile", icon="GREASEPENCIL" if item["Profile"] else "ADD", text="")
+            op.ifc_class = self.props.parameterized_profile_classes
+            op.material_profile = item["id"]
+        else:
+            # TODO: support non parametric profiles by showing a list of named profiles to select from, or an
+            # eyedropper to pick profile geometry from the scene
+            row.operator("bim.disable_editing_material_set_item", icon="X", text="")
+
+    def draw_editable_profile_ui(self, layout, item):
+        for attribute in self.props.material_set_item_profile_attributes:
+            row = layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "float":
+                row.prop(attribute, "float_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
     def draw_read_only_set_item_ui(self, set_item_id, index, is_first=False, is_last=False):
         if self.product_data["type"] == "IfcMaterialList":
             item = Data.materials[set_item_id]

src/blenderbim/blenderbim/bim/module/model/pie.py

@@ -84,6 +84,8 @@ class PieAddOpening(bpy.types.Operator):
             for obj in context.selected_objects:
                 if "IfcOpeningElement" in obj.name or not obj.BIMObjectProperties.ifc_definition_id:
                     opening_name = obj.name
+                elif len(obj.children) == 1 and not obj.children[0].BIMObjectProperties.ifc_definition_id:
+                    opening_name = obj.children[0].name
                 else:
                     opj_name = obj.name
             bpy.ops.bim.add_opening(obj=opj_name, opening=opening_name)

src/blenderbim/blenderbim/bim/module/project/__init__.py

@@ -3,6 +3,7 @@ from . import ui, prop, operator
 
 classes = (
     operator.CreateProject,
+    operator.CreateProjectLibrary,
     operator.ValidateIfcFile,
     prop.BIMProjectProperties,
     ui.BIM_PT_project,

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -53,6 +53,30 @@ class CreateProject(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class CreateProjectLibrary(bpy.types.Operator):
+    bl_idname = "bim.create_project_library"
+    bl_label = "Create Project Library"
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        if self.file:
+            return {"FINISHED"}
+
+        IfcStore.file = ifcopenshell.api.run(
+            "project.create_file", **{"version": bpy.context.scene.BIMProperties.export_schema}
+        )
+        self.file = IfcStore.get_file()
+
+        if self.file.schema == "IFC2X3":
+            bpy.ops.bim.add_person()
+            bpy.ops.bim.add_organisation()
+
+        project_library = bpy.data.objects.new("My Project Library", None)
+        bpy.ops.bim.assign_class(obj=project_library.name, ifc_class="IfcProjectLibrary")
+        bpy.ops.bim.assign_unit()
+        return {"FINISHED"}
+
+
 class ValidateIfcFile(bpy.types.Operator):
     bl_idname = "bim.validate_ifc_file"
     bl_label = "Validate IFC File"

src/blenderbim/blenderbim/bim/module/project/ui.py

@@ -63,3 +63,6 @@ class BIM_PT_project(Panel):
         row.prop(props, "volume_unit", text="Volume Unit")
         row = self.layout.row()
         row.operator("bim.create_project")
+        if props.export_schema != "IFC2X3":
+            row = self.layout.row()
+            row.operator("bim.create_project_library")

src/blenderbim/blenderbim/bim/module/sequence/__init__.py

@@ -2,21 +2,55 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
+    operator.LoadWorkPlans,
+    operator.DisableWorkPlanEditingUI,
+    operator.AddWorkPlan,
+    operator.EditWorkPlan,
+    operator.RemoveWorkPlan,
+    operator.EnableEditingWorkPlan,
+    operator.DisableEditingWorkPlan,
+    operator.LoadWorkSchedules,
+    operator.DisableWorkScheduleEditingUI,
+    operator.AddWorkSchedule,
+    operator.EditWorkSchedule,
+    operator.RemoveWorkSchedule,
+    operator.EnableEditingWorkSchedule,
+    operator.DisableEditingWorkSchedule,
     operator.LoadTasks,
     operator.DisableTaskEditingUI,
-    operator.AddWorkPlan,
+    operator.LoadWorkCalendars,
-    operator.RemoveWorkPlan,
+    operator.DisableWorkCalendarEditingUI,
+    operator.AddWorkCalendar,
+    operator.EditWorkCalendar,
+    operator.RemoveWorkCalendar,
+    operator.EnableEditingWorkCalendar,
+    operator.DisableEditingWorkCalendar,
+    prop.WorkPlan,
+    prop.BIMWorkPlanProperties,
+    prop.WorkSchedule,
+    prop.BIMWorkScheduleProperties,
+    prop.WorkCalendar,
+    prop.BIMWorkCalendarProperties,
     prop.Task,
     prop.BIMTaskProperties,
     ui.BIM_PT_work_plans,
+    ui.BIM_UL_work_plans,
+    ui.BIM_PT_work_schedules,
+    ui.BIM_UL_work_schedules,
+    ui.BIM_PT_work_calendars,
+    ui.BIM_UL_work_calendars,
     ui.BIM_PT_tasks,
     ui.BIM_UL_tasks,
 )
 
-
 def register():
     bpy.types.Scene.BIMTaskProperties = bpy.props.PointerProperty(type=prop.BIMTaskProperties)
-
+    bpy.types.Scene.BIMWorkPlanProperties = bpy.props.PointerProperty(type=prop.BIMWorkPlanProperties)
+    bpy.types.Scene.BIMWorkScheduleProperties = bpy.props.PointerProperty(type=prop.BIMWorkScheduleProperties)
+    bpy.types.Scene.BIMWorkCalendarProperties = bpy.props.PointerProperty(type=prop.BIMWorkCalendarProperties)
 
 def unregister():
     del bpy.types.Scene.BIMTaskProperties
+    del bpy.types.Scene.BIMWorkPlanProperties
+    del bpy.types.Scene.BIMWorkScheduleProperties
+    del bpy.types.Scene.BIMWorkCalendarProperties

src/blenderbim/blenderbim/bim/module/sequence/operator.py

@@ -1,9 +1,36 @@
 import bpy
+import json
 import ifcopenshell.api
 from blenderbim.bim.ifc import IfcStore
 from ifcopenshell.api.sequence.data import Data
 
 
+class LoadWorkPlans(bpy.types.Operator):
+    bl_idname = "bim.load_work_plans"
+    bl_label = "Load Work Plans"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkPlanProperties
+        while len(props.work_plans) > 0:
+            props.work_plans.remove(0)
+        for ifc_definition_id, work_plan in Data.work_plans.items():
+            new = props.work_plans.add()
+            new.ifc_definition_id = ifc_definition_id
+            new.name = work_plan["Name"] or "Unnamed"
+        props.is_editing = True
+        bpy.ops.bim.disable_editing_work_plan()
+        return {"FINISHED"}
+
+
+class DisableWorkPlanEditingUI(bpy.types.Operator):
+    bl_idname = "bim.disable_work_plan_editing_ui"
+    bl_label = "Disable WorkPlan Editing UI"
+
+    def execute(self, context):
+        context.scene.BIMWorkPlanProperties.is_editing = False
+        return {"FINISHED"}
+
+
 class AddWorkPlan(bpy.types.Operator):
     bl_idname = "bim.add_work_plan"
     bl_label = "Add Work Plan"
@@ -11,6 +38,33 @@ class AddWorkPlan(bpy.types.Operator):
     def execute(self, context):
         ifcopenshell.api.run("sequence.add_work_plan", IfcStore.get_file())
         Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_plans()
+        return {"FINISHED"}
+
+
+class EditWorkPlan(bpy.types.Operator):
+    bl_idname = "bim.edit_work_plan"
+    bl_label = "Edit Work Plan"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkPlanProperties
+        attributes = {}
+        for attribute in props.work_plan_attributes:
+            if attribute.is_null:
+                attributes[attribute.name] = None
+            else:
+                if attribute.data_type == "string":
+                    attributes[attribute.name] = attribute.string_value
+                elif attribute.data_type == "enum":
+                    attributes[attribute.name] = attribute.enum_value
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "sequence.edit_work_plan",
+            self.file,
+            **{"work_plan": self.file.by_id(props.active_work_plan_id), "attributes": attributes}
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_plans()
         return {"FINISHED"}
 
 
@@ -20,10 +74,290 @@ class RemoveWorkPlan(bpy.types.Operator):
     work_plan: bpy.props.IntProperty()
 
     def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run("sequence.remove_work_plan", self.file, **{"work_plan": self.file.by_id(self.work_plan)})
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_plans()
+        return {"FINISHED"}
+
+
+class EnableEditingWorkPlan(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_work_plan"
+    bl_label = "Enable Editing Work Plan"
+    work_plan: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMWorkPlanProperties
+        while len(props.work_plan_attributes) > 0:
+            props.work_plan_attributes.remove(0)
+
+        data = Data.work_plans[self.work_plan]
+
+        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkPlan").all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity":
+                continue
+            new = props.work_plan_attributes.add()
+            new.name = attribute.name()
+            new.is_null = data[attribute.name()] is None
+            new.is_optional = attribute.optional()
+            new.data_type = data_type
+            if attribute.name() in ["CreationDate", "StartTime", "FinishTime"]:
+                new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
+            elif data_type == "string":
+                new.string_value = "" 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()]
+        props.active_work_plan_id = self.work_plan
+        return {"FINISHED"}
+
+
+class DisableEditingWorkPlan(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_work_plan"
+    bl_label = "Disable Editing Work Plan"
+
+    def execute(self, context):
+        context.scene.BIMWorkPlanProperties.active_work_plan_id = 0
+        return {"FINISHED"}
+
+
+class LoadWorkSchedules(bpy.types.Operator):
+    bl_idname = "bim.load_work_schedules"
+    bl_label = "Load Work Schedules"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkScheduleProperties
+        while len(props.work_schedules) > 0:
+            props.work_schedules.remove(0)
+        for ifc_definition_id, work_schedule in Data.work_schedules.items():
+            new = props.work_schedules.add()
+            new.ifc_definition_id = ifc_definition_id
+            new.name = work_schedule["Name"] or "Unnamed"
+        props.is_editing = True
+        bpy.ops.bim.disable_editing_work_schedule()
+        return {"FINISHED"}
+
+
+class DisableWorkScheduleEditingUI(bpy.types.Operator):
+    bl_idname = "bim.disable_work_schedule_editing_ui"
+    bl_label = "Disable WorkSchedule Editing UI"
+
+    def execute(self, context):
+        context.scene.BIMWorkScheduleProperties.is_editing = False
+        return {"FINISHED"}
+
+
+class AddWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.add_work_schedule"
+    bl_label = "Add Work Schedule"
+
+    def execute(self, context):
+        ifcopenshell.api.run("sequence.add_work_schedule", IfcStore.get_file())
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_schedules()
+        return {"FINISHED"}
+
+
+class EditWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.edit_work_schedule"
+    bl_label = "Edit Work Schedule"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkScheduleProperties
+        attributes = {}
+        for attribute in props.work_schedule_attributes:
+            if attribute.is_null:
+                attributes[attribute.name] = None
+            else:
+                if attribute.data_type == "string":
+                    attributes[attribute.name] = attribute.string_value
+                elif attribute.data_type == "enum":
+                    attributes[attribute.name] = attribute.enum_value
+        self.file = IfcStore.get_file()
         ifcopenshell.api.run(
-            "sequence.remove_work_plan", IfcStore.get_file(), work_plan=IfcStore.get_file().by_id(self.work_plan)
+            "sequence.edit_work_schedule",
+            self.file,
+            **{"work_schedule": self.file.by_id(props.active_work_schedule_id), "attributes": attributes}
         )
         Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_schedules()
+        return {"FINISHED"}
+
+
+class RemoveWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.remove_work_schedule"
+    bl_label = "Remove Work Schedule"
+    work_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "sequence.remove_work_schedule", self.file, **{"work_schedule": self.file.by_id(self.work_schedule)}
+        )
+        Data.load(self.file)
+        bpy.ops.bim.load_work_schedules()
+        return {"FINISHED"}
+
+
+class EnableEditingWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_work_schedule"
+    bl_label = "Enable Editing Work Schedule"
+    work_schedule: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMWorkScheduleProperties
+        while len(props.work_schedule_attributes) > 0:
+            props.work_schedule_attributes.remove(0)
+
+        data = Data.work_schedules[self.work_schedule]
+
+        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkSchedule").all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity":
+                continue
+            new = props.work_schedule_attributes.add()
+            new.name = attribute.name()
+            new.is_null = data[attribute.name()] is None
+            new.is_optional = attribute.optional()
+            new.data_type = data_type
+            if attribute.name() in ["CreationDate", "StartTime", "FinishTime"]:
+                new.string_value = "" if new.is_null else data[attribute.name()].isoformat()
+            elif data_type == "string":
+                new.string_value = "" 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()]
+        props.active_work_schedule_id = self.work_schedule
+        return {"FINISHED"}
+
+
+class DisableEditingWorkSchedule(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_work_schedule"
+    bl_label = "Disable Editing Work Schedule"
+
+    def execute(self, context):
+        context.scene.BIMWorkScheduleProperties.active_work_schedule_id = 0
+        return {"FINISHED"}
+
+
+class LoadWorkCalendars(bpy.types.Operator):
+    bl_idname = "bim.load_work_calendars"
+    bl_label = "Load Work Calendars"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkCalendarProperties
+        while len(props.work_calendars) > 0:
+            props.work_calendars.remove(0)
+        for ifc_definition_id, work_calendar in Data.work_calendars.items():
+            new = props.work_calendars.add()
+            new.ifc_definition_id = ifc_definition_id
+            new.name = work_calendar["Name"] or "Unnamed"
+        props.is_editing = True
+        bpy.ops.bim.disable_editing_work_calendar()
+        return {"FINISHED"}
+
+
+class DisableWorkCalendarEditingUI(bpy.types.Operator):
+    bl_idname = "bim.disable_work_calendar_editing_ui"
+    bl_label = "Disable WorkCalendar Editing UI"
+
+    def execute(self, context):
+        context.scene.BIMWorkCalendarProperties.is_editing = False
+        return {"FINISHED"}
+
+
+class AddWorkCalendar(bpy.types.Operator):
+    bl_idname = "bim.add_work_calendar"
+    bl_label = "Add Work Calendar"
+
+    def execute(self, context):
+        ifcopenshell.api.run("sequence.add_work_calendar", IfcStore.get_file())
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_calendars()
+        return {"FINISHED"}
+
+
+class EditWorkCalendar(bpy.types.Operator):
+    bl_idname = "bim.edit_work_calendar"
+    bl_label = "Edit Work Calendar"
+
+    def execute(self, context):
+        props = context.scene.BIMWorkCalendarProperties
+        attributes = {}
+        for attribute in props.work_calendar_attributes:
+            if attribute.is_null:
+                attributes[attribute.name] = None
+            else:
+                if attribute.data_type == "string":
+                    attributes[attribute.name] = attribute.string_value
+                elif attribute.data_type == "enum":
+                    attributes[attribute.name] = attribute.enum_value
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "sequence.edit_work_calendar",
+            self.file,
+            **{"work_calendar": self.file.by_id(props.active_work_calendar_id), "attributes": attributes}
+        )
+        Data.load(IfcStore.get_file())
+        bpy.ops.bim.load_work_calendars()
+        return {"FINISHED"}
+
+
+class RemoveWorkCalendar(bpy.types.Operator):
+    bl_idname = "bim.remove_work_calendar"
+    bl_label = "Remove Work Plan"
+    work_calendar: bpy.props.IntProperty()
+
+    def execute(self, context):
+        self.file = IfcStore.get_file()
+        ifcopenshell.api.run(
+            "sequence.remove_work_calendar", self.file, **{"work_calendar": self.file.by_id(self.work_calendar)}
+        )
+        Data.load(self.file)
+        bpy.ops.bim.load_work_calendars()
+        return {"FINISHED"}
+
+
+class EnableEditingWorkCalendar(bpy.types.Operator):
+    bl_idname = "bim.enable_editing_work_calendar"
+    bl_label = "Enable Editing Work Plan"
+    work_calendar: bpy.props.IntProperty()
+
+    def execute(self, context):
+        props = context.scene.BIMWorkCalendarProperties
+        while len(props.work_calendar_attributes) > 0:
+            props.work_calendar_attributes.remove(0)
+
+        data = Data.work_calendars[self.work_calendar]
+
+        for attribute in IfcStore.get_schema().declaration_by_name("IfcWorkCalendar").all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity":
+                continue
+            new = props.work_calendar_attributes.add()
+            new.name = attribute.name()
+            new.is_null = data[attribute.name()] is None
+            new.is_optional = attribute.optional()
+            new.data_type = data_type
+            if data_type == "string":
+                new.string_value = "" 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()]
+        props.active_work_calendar_id = self.work_calendar
+        return {"FINISHED"}
+
+
+class DisableEditingWorkCalendar(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_work_calendar"
+    bl_label = "Disable Editing Work Calendar"
+
+    def execute(self, context):
+        context.scene.BIMWorkCalendarProperties.active_work_calendar_id = 0
         return {"FINISHED"}
 
 

src/blenderbim/blenderbim/bim/module/sequence/prop.py

@@ -23,3 +23,42 @@ class BIMTaskProperties(PropertyGroup):
     is_editing: BoolProperty(name="Is Editing", default=False)
     tasks: CollectionProperty(name="Tasks", type=Task)
     active_task_index: IntProperty(name="Active Task Index")
+
+
+class WorkPlan(PropertyGroup):
+    name: StringProperty(name="Name")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
+class BIMWorkPlanProperties(PropertyGroup):
+    work_plan_attributes: CollectionProperty(name="Work Plan Attributes", type=Attribute)
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    work_plans: CollectionProperty(name="Work Plans", type=WorkPlan)
+    active_work_plan_index: IntProperty(name="Active Work Plan Index")
+    active_work_plan_id: IntProperty(name="Active Work Plan Id")
+
+
+class WorkSchedule(PropertyGroup):
+    name: StringProperty(name="Name")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
+class BIMWorkScheduleProperties(PropertyGroup):
+    work_schedule_attributes: CollectionProperty(name="Work Schedule Attributes", type=Attribute)
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    work_schedules: CollectionProperty(name="Work Schedules", type=WorkSchedule)
+    active_work_schedule_index: IntProperty(name="Active Work Schedules Index")
+    active_work_schedule_id: IntProperty(name="Active Work Schedules Id")
+
+
+class WorkCalendar(PropertyGroup):
+    name: StringProperty(name="Name")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
+class BIMWorkCalendarProperties(PropertyGroup):
+    work_calendar_attributes: CollectionProperty(name="Work Calendar Attributes", type=Attribute)
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    work_calendars: CollectionProperty(name="Work Calendar", type=WorkCalendar)
+    active_work_calendar_index: IntProperty(name="Active Work Calendar Index")
+    active_work_calendar_id: IntProperty(name="Active Work Calendar Id")

src/blenderbim/blenderbim/bim/module/sequence/ui.py

@@ -18,15 +18,181 @@ class BIM_PT_work_plans(Panel):
     def draw(self, context):
         if not Data.is_loaded:
             Data.load(IfcStore.get_file())
+        self.props = context.scene.BIMWorkPlanProperties
+        row = self.layout.row(align=True)
+        row.label(text="{} Work Plans Found".format(len(Data.work_plans)), icon="TEXT")
+        if self.props.is_editing:
+            row.operator("bim.add_work_plan", text="", icon="ADD")
+            row.operator("bim.disable_work_plan_editing_ui", text="", icon="CHECKMARK")
+        else:
+            row.operator("bim.load_work_plans", text="", icon="GREASEPENCIL")
 
-        row = self.layout.row()
+        if self.props.is_editing:
-        row.operator("bim.add_work_plan", icon="ADD")
+            self.layout.template_list(
+                "BIM_UL_work_plans",
+                "",
+                self.props,
+                "work_plans",
+                self.props,
+                "active_work_plan_index",
+            )
 
-        for work_plan_id, work_plan in Data.work_plans.items():
+        if self.props.active_work_plan_id:
+            self.draw_editable_ui(context)
+
+    def draw_editable_ui(self, context):
+        for attribute in self.props.work_plan_attributes:
             row = self.layout.row(align=True)
-            row.label(text=work_plan["Name"] or "Unnamed", icon="TEXT")
+            if attribute.data_type == "string":
-            row.operator("bim.add_work_plan", text="", icon="GREASEPENCIL")
+                row.prop(attribute, "string_value", text=attribute.name)
-            row.operator("bim.remove_work_plan", text="", icon="X").work_plan = work_plan_id
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+
+class BIM_UL_work_plans(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            row = layout.row(align=True)
+            row.label(text=item.name)
+            if context.scene.BIMWorkPlanProperties.active_work_plan_id == item.ifc_definition_id:
+                row.operator("bim.edit_work_plan", text="", icon="CHECKMARK")
+                row.operator("bim.disable_editing_work_plan", text="", icon="X")
+            elif context.scene.BIMWorkPlanProperties.active_work_plan_id:
+                row.operator("bim.remove_work_plan", text="", icon="X").work_plan = item.ifc_definition_id
+            else:
+                op = row.operator("bim.enable_editing_work_plan", text="", icon="GREASEPENCIL")
+                op.work_plan = item.ifc_definition_id
+                row.operator("bim.remove_work_plan", text="", icon="X").work_plan = item.ifc_definition_id
+
+
+class BIM_PT_work_schedules(Panel):
+    bl_label = "IFC Work Schedules"
+    bl_idname = "BIM_PT_work_schedules"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        if not Data.is_loaded:
+            Data.load(IfcStore.get_file())
+        self.props = context.scene.BIMWorkScheduleProperties
+        row = self.layout.row(align=True)
+        row.label(text="{} Work Schedules Found".format(len(Data.work_schedules)), icon="TEXT")
+        if self.props.is_editing:
+            row.operator("bim.add_work_schedule", text="", icon="ADD")
+            row.operator("bim.disable_work_schedule_editing_ui", text="", icon="CHECKMARK")
+        else:
+            row.operator("bim.load_work_schedules", text="", icon="GREASEPENCIL")
+
+        if self.props.is_editing:
+            self.layout.template_list(
+                "BIM_UL_work_schedules",
+                "",
+                self.props,
+                "work_schedules",
+                self.props,
+                "active_work_schedule_index",
+            )
+
+        if self.props.active_work_schedule_id:
+            self.draw_editable_ui(context)
+
+    def draw_editable_ui(self, context):
+        for attribute in self.props.work_schedule_attributes:
+            row = self.layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+
+class BIM_UL_work_schedules(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            row = layout.row(align=True)
+            row.label(text=item.name)
+            if context.scene.BIMWorkScheduleProperties.active_work_schedule_id == item.ifc_definition_id:
+                row.operator("bim.edit_work_schedule", text="", icon="CHECKMARK")
+                row.operator("bim.disable_editing_work_schedule", text="", icon="X")
+            elif context.scene.BIMWorkScheduleProperties.active_work_schedule_id:
+                row.operator("bim.remove_work_schedule", text="", icon="X").work_schedule = item.ifc_definition_id
+            else:
+                op = row.operator("bim.enable_editing_work_schedule", text="", icon="GREASEPENCIL")
+                op.work_schedule = item.ifc_definition_id
+                row.operator("bim.remove_work_schedule", text="", icon="X").work_schedule = item.ifc_definition_id
+
+
+class BIM_PT_work_calendars(Panel):
+    bl_label = "IFC Work Calendars"
+    bl_idname = "BIM_PT_work_calendars"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        if not Data.is_loaded:
+            Data.load(IfcStore.get_file())
+        self.props = context.scene.BIMWorkCalendarProperties
+        row = self.layout.row(align=True)
+        row.label(text="{} Work Calendar Found".format(len(Data.work_calendars)), icon="TEXT")
+        if self.props.is_editing:
+            row.operator("bim.add_work_calendar", text="", icon="ADD")
+            row.operator("bim.disable_work_calendar_editing_ui", text="", icon="CHECKMARK")
+        else:
+            row.operator("bim.load_work_calendars", text="", icon="GREASEPENCIL")
+
+        if self.props.is_editing:
+            self.layout.template_list(
+                "BIM_UL_work_calendars",
+                "",
+                self.props,
+                "work_calendars",
+                self.props,
+                "active_work_calendar_index",
+            )
+
+        if self.props.active_work_calendar_id:
+            self.draw_editable_ui(context)
+
+    def draw_editable_ui(self, context):
+        for attribute in self.props.work_calendar_attributes:
+            row = self.layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
+
+class BIM_UL_work_calendars(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            row = layout.row(align=True)
+            row.label(text=item.name)
+            if context.scene.BIMWorkCalendarProperties.active_work_calendar_id == item.ifc_definition_id:
+                row.operator("bim.edit_work_calendar", text="", icon="CHECKMARK")
+                row.operator("bim.disable_editing_work_calendar", text="", icon="X")
+            elif context.scene.BIMWorkCalendarProperties.active_work_calendar_id:
+                row.operator("bim.remove_work_calendar", text="", icon="X").work_calendar = item.ifc_definition_id
+            else:
+                op = row.operator("bim.enable_editing_work_calendar", text="", icon="GREASEPENCIL")
+                op.work_calendar = item.ifc_definition_id
+                row.operator("bim.remove_work_calendar", text="", icon="X").work_calendar = item.ifc_definition_id
 
 
 class BIM_PT_tasks(Panel):

src/blenderbim/blenderbim/bim/module/void/ui.py

@@ -27,6 +27,8 @@ class BIM_PT_voids(Panel):
             for obj in context.selected_objects:
                 if "IfcOpeningElement" in obj.name or not obj.BIMObjectProperties.ifc_definition_id:
                     op.opening = obj.name
+                elif len(obj.children) == 1 and not obj.children[0].BIMObjectProperties.ifc_definition_id:
+                    op.opening = obj.children[0].name
                 else:
                     op.obj = obj.name
 

src/blenderbim/dxf2ifc.py

@@ -1,3 +1,6 @@
+import ifcopenshell
+import ezdxf
+
 class Dxf2Ifc:
     def execute(self):
         self.create_ifc_file()
@@ -14,7 +17,7 @@ class Dxf2Ifc:
                             [
                                 self.file.createIfcFaceOuterBound(
                                     self.file.createIfcPolyLoop(
-                                        [self.file.createIfcCartesianPoint((v.dxf.location)) for v in face[0:3]]
+                                        [self.file.createIfcCartesianPoint((face[index].dxf.location)) for index in range(len(face) -1)]
                                     ),
                                     True,
                                 )

src/ifcbimtester/bimtester/features/steps/geolocation/en.py

@@ -1,6 +1,8 @@
 import math
+import numpy as np
 import ifcopenshell
 import ifcopenshell.util.element
+import ifcopenshell.util.placement
 import ifcopenshell.util.geolocation
 from behave import step
 from bimtester import util
@@ -171,7 +173,7 @@ def step_impl(context, number):
         return check_ifc2x3_geolocation("EPset_MapConversion", "Height", number)
     abscissa = check_ifc4_geolocation("IfcMapConversion", "XAxisAbscissa", should_assert=False)
     ordinate = check_ifc4_geolocation("IfcMapConversion", "XAxisOrdinate", should_assert=False)
-    actual_value = round(ifcopenshell.util.geolocation.xy2angle(abscissa, ordinate), 3)
+    actual_value = round(ifcopenshell.util.geolocation.xaxis2angle(abscissa, ordinate), 3)
     value = round(number, 3)
     assert actual_value == value, _('We expected a value of "{}" but instead got "{}"').format(value, actual_value)
 
@@ -186,6 +188,26 @@ def step_impl(context, number):
     check_ifc4_geolocation("IfcMapConversion", "Scale", number)
 
 
+@step(u'The model must be rotated clockwise by "{number}" for true north to point up')
+def step_impl(context, number):
+    number = util.assert_number(number)
+    project = IfcStore.file.by_type("IfcProject")[0]
+    for c in project.RepresentationContexts:
+        if c.TrueNorth:
+            actual_value = round(
+                ifcopenshell.util.geolocation.yaxis2angle(
+                    c.TrueNorth.DirectionRatios[0], c.TrueNorth.DirectionRatios[1]
+                ),
+                3,
+            )
+            value = round(number, 3)
+            assert actual_value == value, _('We expected a value of "{}" but instead got "{}"').format(
+                value, actual_value
+            )
+            return
+    assert False, _("True north is not defined in the file")
+
+
 @step(u'The site "{guid}" has a longitude of "{number}"')
 def step_impl(context, guid, number):
     number = util.assert_number(number)
@@ -212,3 +234,14 @@ def step_impl(context, guid, number):
     site = util.assert_guid(IfcStore.file, guid)
     util.assert_type(site, "IfcSite")
     util.assert_attribute(site, "RefElevation", number)
+
+
+@step(u'The site "{guid}" must be coincident with the project origin')
+def step_impl(context, guid):
+    site = util.assert_guid(IfcStore.file, guid)
+    util.assert_type(site, "IfcSite")
+    if not site.ObjectPlacement:
+        assert False, _("The site has no object placement")
+    site_placement = ifcopenshell.util.placement.get_local_placement(site.ObjectPlacement)[:,3][0:3]
+    origin = np.array([0, 0, 0])
+    assert np.allclose(origin, site_placement), _('The site location is at "{}" instead of "{}"')

src/ifcgeom/IfcGeom.h

@@ -507,10 +507,15 @@ public:
 
 	virtual bool convert_placement(IfcUtil::IfcBaseClass* item, gp_Trsf& trsf) {
 		if (item->as<IfcSchema::IfcObjectPlacement>()) {
-			return convert(item->as<IfcSchema::IfcObjectPlacement>(), trsf);
+			try {
-		} else {
+				return convert(item->as<IfcSchema::IfcObjectPlacement>(), trsf);
-			return false;
+			} catch (std::exception& e) { 
+				Logger::Error(e, item); 
+			} catch (...) { 
+				Logger::Error("Failed processing placement", item); 
+			}
 		}
+		return false;
 	}
 
 };

src/ifcopenshell-python/ifcopenshell/api/aggregate/assign_object.py

@@ -36,9 +36,9 @@ class Usecase:
                 self.file.remove(decomposes)
 
         if is_decomposed_by:
-            related_objects = list(is_decomposed_by.RelatedObjects)
+            related_objects = set(is_decomposed_by.RelatedObjects)
-            related_objects.append(self.settings["product"])
+            related_objects.add(self.settings["product"])
-            is_decomposed_by.RelatedObjects = related_objects
+            is_decomposed_by.RelatedObjects = list(related_objects)
             ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": is_decomposed_by})
         else:
             is_decomposed_by = self.file.create_entity(
@@ -50,3 +50,4 @@ class Usecase:
                     "RelatingObject": self.settings["relating_object"],
                 }
             )
+        return is_decomposed_by

src/ifcopenshell-python/ifcopenshell/api/constraint/unassign_constraint.py

@@ -1,6 +1,3 @@
-import ifcopenshell
-
-
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file

src/ifcopenshell-python/ifcopenshell/api/context/add_context.py

@@ -21,7 +21,12 @@ class Usecase:
                 context = self.file.createIfcGeometricRepresentationContext(None, "Plan", 2, 1.0e-05, self.origin)
             else:
                 context = self.file.createIfcGeometricRepresentationContext(None, "Model", 3, 1.0e-05, self.origin)
-            project = self.file.by_type("IfcProject")[0]
+
+            if self.file.schema == "IFC2X3":
+                project = self.file.by_type("IfcProject")[0]
+            else:
+                project = self.file.by_type("IfcContext")[0]
+
             if project.RepresentationContexts:
                 contexts = list(project.RepresentationContexts)
             else:

src/ifcopenshell-python/ifcopenshell/api/georeference/data.py

@@ -2,12 +2,14 @@ class Data:
     is_loaded = False
     map_conversion = {}
     projected_crs = {}
+    true_north = {}
 
     @classmethod
     def purge(cls):
         cls.is_loaded = False
         cls.map_conversion = {}
         cls.projected_crs = {}
+        cls.true_north = None
 
     @classmethod
     def load(cls, file):
@@ -15,6 +17,7 @@ class Data:
             return
         cls.map_conversion = {}
         cls.projected_crs = {}
+        cls.true_north = {}
         if file.schema == "IFC2X3":
             return
         for context in file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
@@ -28,4 +31,9 @@ class Data:
             if cls.projected_crs["MapUnit"]:
                 cls.projected_crs["MapUnit"] = map_conversion.TargetCRS.MapUnit.get_info()
             break
+        for context in file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
+            if not context.TrueNorth:
+                continue
+            cls.true_north = context.TrueNorth.DirectionRatios
+            break
         cls.is_loaded = True

src/ifcopenshell-python/ifcopenshell/api/georeference/edit_georeferencing.py

@@ -7,6 +7,7 @@ class Usecase:
         self.settings = {
             "map_conversion": {},
             "projected_crs": {},
+            "true_north": [],
             "map_unit": "",
         }
         for key, value in settings.items():
@@ -21,6 +22,7 @@ class Usecase:
             setattr(projected_crs, name, value)
         self.remove_existing_map_unit(projected_crs)
         self.set_map_unit(projected_crs)
+        self.set_true_north()
 
     def remove_existing_map_unit(self, projected_crs):
         if projected_crs.MapUnit and len(self.file.get_inverse(projected_crs.MapUnit)) == 1:
@@ -50,3 +52,20 @@ class Usecase:
             self.settings["map_unit"],
             self.file.createIfcMeasureWithUnit(value_component, si_unit),
         )
+
+    def set_true_north(self):
+        if self.settings["true_north"] == []:
+            return
+        for context in self.file.by_type("IfcGeometricRepresentationContext", include_subtypes=False):
+            if context.TrueNorth:
+                if len(self.file.get_inverse(context.TrueNorth)) != 1:
+                    context.TrueNorth = self.file.create_entity("IfcDirection")
+            else:
+                context.TrueNorth = self.file.create_entity("IfcDirection")
+            direction = context.TrueNorth
+            if self.settings["true_north"] is None:
+                context.TrueNorth = self.settings["true_north"]
+            elif context.CoordinateSpaceDimension == 2:
+                direction.DirectionRatios = self.settings["true_north"][0:2]
+            else:
+                direction.DirectionRatios = self.settings["true_north"][0:2] + [0.0]

src/ifcopenshell-python/ifcopenshell/api/material/add_constituent.py

@@ -1,6 +1,3 @@
-import ifcopenshell
-
-
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file

src/ifcopenshell-python/ifcopenshell/api/material/add_layer.py

@@ -1,6 +1,3 @@
-import ifcopenshell
-
-
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file

src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py

@@ -4,6 +4,7 @@ class Usecase():
         self.settings = {
             "profile": None,
             "attributes": {},
+            "profile_attributes": {},
             "material": None
         }
         for key, value in settings.items():
@@ -13,3 +14,5 @@ class Usecase():
         for name, value in self.settings["attributes"].items():
             setattr(self.settings["profile"], name, value)
         self.settings["profile"].Material = self.settings["material"]
+        for name, value in self.settings["profile_attributes"].items():
+            setattr(self.settings["profile"].Profile, name, value)

src/ifcopenshell-python/ifcopenshell/api/material/remove_constituent.py

@@ -1,6 +1,3 @@
-import ifcopenshell
-
-
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file

src/ifcopenshell-python/ifcopenshell/api/material/remove_layer.py

@@ -1,6 +1,3 @@
-import ifcopenshell
-
-
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file

src/ifcopenshell-python/ifcopenshell/api/owner/add_organisation.py

@@ -9,4 +9,7 @@ class Usecase:
             self.settings[key] = value
 
     def execute(self):
-        return self.file.create_entity("IfcOrganization", **self.settings)
+        if self.file.schema == "IFC2X3": 
+            self.settings["Id"] = self.settings["Identification"] 
+            del self.settings["Identification"]
+        return self.file.create_entity("IfcOrganization", **self.settings)

src/ifcopenshell-python/ifcopenshell/api/owner/add_person.py

@@ -10,4 +10,7 @@ class Usecase:
             self.settings[key] = value
 
     def execute(self):
-        return self.file.create_entity("IfcPerson", **self.settings)
+        if self.file.schema == "IFC2X3": 
+            self.settings["Id"] = self.settings["Identification"] 
+            del self.settings["Identification"]
+        return self.file.create_entity("IfcPerson", **self.settings)

src/ifcopenshell-python/ifcopenshell/api/pset/add_pset.py

@@ -27,7 +27,7 @@ class Usecase:
             pset = self.file.create_entity(
                 "IfcPropertySet", **{"GlobalId": ifcopenshell.guid.new(), "Name": self.settings["Name"]}
             )
-            has_property_sets = list(self.settings["product"].HasPropertySets)
+            has_property_sets = list(self.settings["product"].HasPropertySets or [])
             has_property_sets.append(pset)
             self.settings["product"].HasPropertySets = has_property_sets
         elif self.settings["product"].is_a("IfcMaterialDefinition"):

src/ifcopenshell-python/ifcopenshell/api/root/remove_product.py

@@ -18,9 +18,9 @@ class Usecase:
         elif self.settings["product"].is_a("IfcTypeProduct"):
             representations = [rm.MappedRepresentation for rm in self.settings["product"].RepresentationMaps or []]
         for representation in representations:
-            ifcopenshell.api.run("owner.unassign_representation",
+            ifcopenshell.api.run("geometry.unassign_representation",
                 self.file, **{"product": self.settings["product"], "representation": representation}
             )
-            ifcopenshell.api.run("owner.remove_representation", self.file, **{"representation": representation})
+            ifcopenshell.api.run("geometry.remove_representation", self.file, **{"representation": representation})
         # TODO: remove object placement and other relationships
         self.file.remove(self.settings["product"])

src/ifcopenshell-python/ifcopenshell/api/sequence/add_work_plan.py

@@ -25,18 +25,7 @@ class Usecase:
         work_plan.StartTime = ifcopenshell.util.date.datetime2ifc(self.settings["start_time"], "IfcDateTime")
 
         context = self.file.by_type("IfcContext")[0]
-        if context.Declares:
+        ifcopenshell.api.run(
-            rel_declares = context.Declares[0]
+            "project.assign_declaration", self.file, definition=work_plan, relating_context=context
-            ifcopenshell.api.run("owner.update_owner_history", self.file, element=rel_declares)
+        )
-        else:
-            rel_declares = self.file.create_entity("IfcRelDeclares", **{
-                "GlobalId": ifcopenshell.guid.new(),
-                "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file),
-                "RelatingContext": context
-            })
-
-        related_definitions = list(rel_declares.RelatedDefinitions or [])
-        related_definitions.append(work_plan)
-        rel_declares.RelatedDefinitions = related_definitions
-
         return work_plan

src/ifcopenshell-python/ifcopenshell/api/sequence/data.py

@@ -4,19 +4,32 @@ import ifcopenshell.util.date
 class Data:
     is_loaded = False
     work_plans = {}
+    work_schedules = {}
     tasks = {}
 
     @classmethod
     def purge(cls):
         cls.is_loaded = False
         cls.work_plans = {}
+        cls.work_schedules = {}
+        cls.work_calendars = {}
         cls.tasks = {}
 
     @classmethod
     def load(cls, file):
+        cls._file = file
+        if not cls._file:
+            return
+        cls.load_work_plans()
+        cls.load_work_schedules()
+        cls.load_work_calendars()
+        cls.load_tasks()
+        cls.is_loaded = True
+
+    @classmethod
+    def load_work_plans(cls):
         cls.work_plans = {}
-        cls.tasks = {}
+        for work_plan in cls._file.by_type("IfcWorkPlan"):
-        for work_plan in file.by_type("IfcWorkPlan"):
             data = work_plan.get_info()
             del data["OwnerHistory"]
             if data["Creators"]:
@@ -26,6 +39,32 @@ class Data:
             if data["FinishTime"]:
                 data["FinishTime"] = ifcopenshell.util.date.ifc2datetime(data["FinishTime"])
             cls.work_plans[work_plan.id()] = data
-        for task in file.by_type("IfcTask"):
+
+    @classmethod
+    def load_work_schedules(cls):
+        cls.work_schedules = {}
+        for work_schedule in cls._file.by_type("IfcWorkSchedule"):
+            data = work_schedule.get_info()
+            del data["OwnerHistory"]
+            if data["Creators"]:
+                data["Creators"] = [p.id() for p in data["Creators"]]
+            data["CreationDate"] = ifcopenshell.util.date.ifc2datetime(data["CreationDate"])
+            data["StartTime"] = ifcopenshell.util.date.ifc2datetime(data["StartTime"])
+            if data["FinishTime"]:
+                data["FinishTime"] = ifcopenshell.util.date.ifc2datetime(data["FinishTime"])
+            cls.work_schedules[work_schedule.id()] = data
+
+    @classmethod
+    def load_work_calendars(cls):
+        for work_calendar in cls._file.by_type("IfcWorkCalendar"):
+            data = work_calendar.get_info()
+            del data["OwnerHistory"]
+            del data["WorkingTimes"]
+            del data["ExceptionTimes"]
+            cls.work_calendars[work_calendar.id()] = data
+
+    @classmethod
+    def load_tasks(cls):
+        cls.tasks = {}
+        for task in cls._file.by_type("IfcTask"):
             cls.tasks[task.id()] = {"Name": task.Name, "Identification": task.Identification or ""}
-        cls.is_loaded=True

src/ifcopenshell-python/ifcopenshell/api/sequence/remove_work_plan.py

@@ -7,8 +7,10 @@ class Usecase:
 
     def execute(self):
         # TODO: do a deep purge
-        if self.settings["work_plan"].HasContext:
+        ifcopenshell.api.run(
-            rel_declares = self.settings["work_plan"].HasContext[0]
+            "project.unassign_declaration",
-            if len(rel_declares.RelatedDefinitions) == 1:
+            self.file,
-                self.file.remove(rel_declares)
+            definition=self.settings["work_plan"],
+            relating_context=self.file.by_type("IfcContext")[0],
+        )
         self.file.remove(self.settings["work_plan"])

src/ifcopenshell-python/ifcopenshell/api/spatial/assign_container.py

@@ -1,5 +1,6 @@
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.placement
 
 
 class Usecase:
@@ -43,3 +44,11 @@ class Usecase:
                     "RelatingStructure": self.settings["relating_structure"],
                 }
             )
+
+        if getattr(self.settings["product"], "ObjectPlacement", None):
+            ifcopenshell.api.run(
+                "geometry.edit_object_placement",
+                self.file,
+                product=self.settings["product"],
+                matrix=ifcopenshell.util.placement.get_local_placement(self.settings["product"].ObjectPlacement),
+            )

src/ifcopenshell-python/ifcopenshell/api/unit/assign_unit.py

@@ -33,7 +33,10 @@ class Usecase():
             # TODO: handle unit rewriting, which is complicated
         else:
             unit_assignment = self.file.createIfcUnitAssignment([u["ifc"] for u in self.settings.values()])
-            self.file.by_type("IfcProject")[0].UnitsInContext = unit_assignment
+            if self.file.schema == "IFC2X3":
+                self.file.by_type("IfcProject")[0].UnitsInContext = unit_assignment
+            else:
+                self.file.by_type("IfcContext")[0].UnitsInContext = unit_assignment
         return unit_assignment
 
     def create_metric_unit(self, unit_type, data):

src/ifcopenshell-python/ifcopenshell/ids.py

@@ -64,7 +64,11 @@ class facet(metaclass=meta_facet):
             yield k, getattr(self, k)
 
     def __str__(self):
-        return self.message % dict(list(self))
+        di = dict(list(self))
+        for k, v in di.items():
+            if isinstance(v, str) and not len(v):
+                di[k] = "not specified"
+        return self.message % di
 
 
 class entity(facet):
@@ -88,19 +92,19 @@ class classification(facet):
     """
 
     parameters = ["system", "value"]
-    message = "a classification reference to '%(value)s' from '%(system)s'"
+    message = "a classification reference '%(value)s' from '%(system)s'"
 
     def __call__(self, inst, logger):
         refs = []
         for association in inst.HasAssociations:
             if association.is_a("IfcRelAssociatesClassification"):
                 cref = association.RelatingClassification
-                refs.append((cref.ReferencedSource, cref.Name))
+                refs.append((cref.ReferencedSource.Name, cref.ItemReference))
 
         return facet_evaluation(
             (self.system, self.value) in refs,
             # @todo
-            "",
+            "[classification_eval_todo]",
         )
 
 
@@ -109,17 +113,19 @@ class property(facet):
     The IDS property facet implenented using `ifcopenshell.util.element`
     """
 
-    parameters = ["property", "propertyset", "value"]
+    parameters = ["name", "propertyset", "value"]
-    message = "a property '%(property)s' in '%(propertyset)s' with value '%(value)s'"
+    
+    # import pdb;pdb.set_trace()
+    message = "a property '%(name)s' in '%(propertyset)s' with value '%(value)s'"
 
     def __call__(self, inst, logger):
         props = ifcopenshell.util.element.get_psets(inst)
         pset = props.get(self.propertyset)
-        val = pset.get(self.property) if pset else None
+        val = pset.get(self.name) if pset else None
         logger.debug("Testing %s == %s", val, self.value)
 
         di = {
-            "property": self.property,
+            "name": self.name,
             "propertyset": self.propertyset,
             "value": val,
         }
@@ -128,13 +134,38 @@ class property(facet):
             msg = self.message % di
         else:
             if pset:
-                msg = "a set '%(propertyset)s', but no property '%(property)'" % di
+                msg = "a set '%(propertyset)s', but no property '%(name)'" % di
             else:
                 msg = "no set '%(propertyset)s'" % di
 
         return facet_evaluation(val == self.value, msg)
 
 
+class material(facet):
+    """
+    The IDS material facet 
+    """
+    parameters = ["name", "value"]
+    message = "a material '%(name)s with value '%(value)s'"
+
+    def __call__(self, inst, logger):
+        material_relations = [rel for rel in inst.HasAssociations if rel.is_a("IfcRelAssociatesMaterial")]
+        names = []
+        for rel in material_relations:
+            if rel.RelatingMaterial.is_a() == "IfcMaterialLayerSetUsage":
+                layers = rel.RelatingMaterial.ForLayerSet.MaterialLayers
+                names = [layer.Material.Name for layer in layers]
+            elif rel.RelatingMaterial.is_a() == "IfcMaterial":
+                names.append(rel.RelatingMaterial.Name)
+        
+        
+        return facet_evaluation(
+            0,
+            # @todo
+            "[material_eval_todo]",
+        )
+
+
 class boolean_logic:
     """
     Boolean conjunction over a collection of functions
@@ -166,17 +197,39 @@ class restriction:
     """
 
     def __init__(self, node):
-        self.options = [
-            n.getAttribute("value")
-            for n in node.childNodes
-            if n.nodeType == n.ELEMENT_NODE and n.tagName.endswith("enumeration")
-        ]
 
+        self.restriction_on = node.getAttribute("base")
+        self.options = []
+        self.type = []
+        
+        for n in node.childNodes:
+            if n.nodeType == n.ELEMENT_NODE and n.tagName.endswith("enumeration"):
+                self.options.append(n.getAttribute("value"))
+                self.type = "enumeration"        
+            elif n.nodeType == n.ELEMENT_NODE and (n.tagName.endswith("Inclusive") or n.tagName.endswith("Exclusive")):
+                self.options.append(n.getAttribute("value"))
+                self.type = "bounds"
+            elif n.nodeType == n.ELEMENT_NODE and n.tagName.endswith("length"):
+                self.options.append(n.getAttribute("value"))
+                self.type = "length"
+            elif n.nodeType == n.ELEMENT_NODE and n.tagName.endswith("pattern"):
+                self.options.append(n.getAttribute("value"))
+                self.type = "pattern"
+                
+        # "Given an instance with %(applicabiliy)s\nWe expect %(requirements)s" % self.__dict__
     def __eq__(self, other):
         return other in self.options
 
     def __repr__(self):
-        return " or ".join(self.options)
+        if self.type == "enumeration":
+            return " or ".join(self.options)
+        elif self.type == "bounds":
+            self.options.sort()
+            return "of type %s, having a value between %s and %s" % (self.restriction_on, self.options[0], self.options[1])
+        elif self.type == "length":
+            return "of type %s with a length of %s" % (self.restriction_on, self.options[0])
+        elif self.type == "pattern":
+            return "of type %s respecting pattern %s" % (self.restriction_on, self.options[0])
 
 
 class specification:
@@ -202,10 +255,11 @@ class specification:
     def __call__(self, inst, logger):
         if self.applicabiliy(inst, logger):
             valid = self.requirements(inst, logger)
+
             if valid:
-                logger.info(str(self) + "\n%s has" % inst + " " + str(valid) + " so is compliant")
+                logger.info({'guid':inst.GlobalId, 'result':valid.success,'sentence':str(self) + "\n%s has" % inst + " " + str(valid) + " so is compliant"})
             else:
-                logger.error(str(self) + "\n%s has" % inst + " " + str(valid) + " so is not compliant")
+                logger.error({'guid':inst.GlobalId, 'result':valid.success, 'sentence':str(self) + "\n%s has" % inst + " " + str(valid) + " so is not compliant"})
 
     def __str__(self):
         return "Given an instance with %(applicabiliy)s\nWe expect %(requirements)s" % self.__dict__
@@ -229,15 +283,17 @@ class ids:
         for spec in self.specifications:
             for elem in ifc_file.by_type("IfcObject"):
                 spec(elem, logger)
-
+                
-
 if __name__ == "__main__":
-    import sys
+    import sys, os
     import logging
     import ifcopenshell
 
+    filename = os.path.join(os.getcwd(), "ids.txt")
+
     logger = logging.getLogger("IDS")
-    logging.basicConfig(level=logging.INFO, format="%(message)s")
+    logging.basicConfig(filename=filename, level=logging.INFO, format="%(message)s")
+    logging.FileHandler(filename, mode='w')
 
     ids_file = ids(sys.argv[1])
     ifc_file = ifcopenshell.open(sys.argv[2])

src/ifcopenshell-python/ifcopenshell/util/geolocation.py

@@ -94,6 +94,16 @@ def global2local(matrix, eastings, northings, orthogonal_height, x_axis_abscissa
     )
 
 
-# Used for converting the X and Y vectors of the X Axis in IFC geolocation
+# Used for converting the X and Y vectors of the X Axis in IFC grid north geolocation
-def xy2angle(x, y):
+def xaxis2angle(x, y):
     return math.degrees(math.atan2(y, x))
+
+
+# Used for converting the X and Y vectors of the Y Axis in IFC true north geolocation
+def yaxis2angle(x, y):
+    angle = math.degrees(math.atan2(y, x)) - 90
+    if angle < -180:
+        angle += 360
+    elif angle > 180:
+        angle -= 360
+    return angle

src/serializers/SvgSerializer.cpp

@@ -181,6 +181,7 @@ void SvgSerializer::write(path_object& p, const TopoDS_Wire& wire, boost::option
                     path.add(center.Y());
 					// @todo isn't there a ")" missing here?
 					// @todo also X, Y are not added to {x,y}coords vector
+					// @todo also z_rotation is in radians, should be in degrees
 
                     // Bounding box:
                     // More important to have all geometry in bounding box than to be minimal
@@ -1060,6 +1061,11 @@ void SvgSerializer::write(const geometry_data& data) {
 							z_rotation -= 180;
 						}
 
+						std::string text_offset = "8";
+						if (scale_) {
+							text_offset = "1";
+						}
+
 						util::string_buffer path;
 						// dominant-baseline="central" is not well supported in IE.
 						// so we add a 0.35 offset to the dy of the tspans
@@ -1073,7 +1079,7 @@ void SvgSerializer::write(const geometry_data& data) {
 						xcoords.push_back(path.add(center.X()));
 						path.add(" ");
 						ycoords.push_back(path.add(center.Y()));
-						path.add(") translate(0 -8)\">");
+						path.add(") translate(0 -" + text_offset + ")\">");
 
 						std::vector<std::string> labels{};
 
@@ -1302,15 +1308,28 @@ void SvgSerializer::write(const geometry_data& data) {
 						10 * ((pa.X() - pb.X()) * (pa.X() - pb.X())) +
 						1 * ((pa.Y() - pb.Y()) * (pa.Y() - pb.Y()))
 					);
-					if (d > furthest_points_distance) {
-						gp_Pnt p3d((pa.XYZ() + pb.XYZ()) / 2.);
-						gp_Pnt2d p2d(p3d.X(), p3d.Y());
 
-						if (fcls.Perform(p2d) == TopAbs_IN) {
+					if (d > furthest_points_distance) {
+						
+						// Sample some points on the line and assure it's inside.
+						bool all_inside = true;
+						for (int i = 5; i < 95; ++i) {
+							gp_Pnt p3d((pa.XYZ() + (pb.XYZ() - pa.XYZ()) * i / 100.));
+							gp_Pnt2d p2d(p3d.X(), p3d.Y());
+
+							if (fcls.Perform(p2d) != TopAbs_IN) {
+								all_inside = false;
+							}
+						}
+
+						if (all_inside) {
+							gp_Pnt p3d((pa.XYZ() + pb.XYZ()) * 0.5);
+							gp_Pnt2d p2d(p3d.X(), p3d.Y());
 							furthest_points = { &pa, &pb };
 							furthest_points_distance = d;
 							center_point = p3d;
 						}
+
 					}
 				}
 			}
@@ -1563,7 +1582,136 @@ void SvgSerializer::resetScale() {
 	ymax = -std::numeric_limits<double>::infinity();
 }
 
+void SvgSerializer::addTextAnnotations(const drawing_key& k) {
+	auto& meta = drawing_metadata[k];
+
+	boost::optional<std::pair<double, double>> range;
+
+	if (k.first && section_data_) {
+		for (auto& sd : *section_data_) {
+			if (sd.which() == 0) {
+				const auto& plan = boost::get<horizontal_plan>(sd);
+				if (k.first == plan.storey) {
+					range = std::make_pair(plan.elevation, plan.next_elevation);
+				}
+			}
+		}
+	}
+
+	auto annotations = file->instances_by_type("IfcAnnotation");
+	if (annotations) {
+		for (auto& ann_ : *annotations) {
+			auto ann = (IfcUtil::IfcBaseEntity*) ann_;
+
+			auto ot = ann->get("ObjectType");
+			auto nm = ann->get("Name");
+			auto ds = ann->get("Description");
+			auto pl = ann->get("ObjectPlacement");
+
+			if (!ot->isNull() && !nm->isNull() && !ds->isNull() && !pl->isNull()) {
+				auto object_type = (std::string) *ot;
+				auto name = (std::string) *nm;
+				auto desc = (std::string) *ds;
+
+				if (object_type == "Text") {
+					IfcGeom::Kernel kernel(file);
+					gp_Trsf trsf;
+					if (kernel.convert_placement(*pl, trsf)) {
+
+						auto v = trsf.TranslationPart();
+						if (k.first) {
+							v.ChangeCoord(1) *= -1.;
+							trsf.SetTranslationPart(v);
+						}
+
+						if (!range || (v.Z() >= range->first && v.Z() < range->second)) {
+
+							if (meta.pln_3d.Position().Direction().Dot(gp_Dir(trsf.HVectorialPart().Column(3))) > 0.99) {
+								auto svg_name = nameElement(ann);
+								path_object* po;
+								if (k.first) {
+									po = &start_path(meta.pln_3d, k.first, svg_name);
+								}
+								else {
+									po = &start_path(meta.pln_3d, k.second, svg_name);
+								}
+
+								if (object_type.size()) {
+									// postfix the object_type for CSS matching
+									boost::replace_all(svg_name, "class=\"IfcAnnotation\"", "class=\"IfcAnnotation " + object_type + "\"");
+								}
+
+								boost::optional<double> font_size;
+								std::vector<std::string> tokens;
+								boost::split(tokens, name, boost::is_any_of("_"));
+								if (tokens.size() == 2) {
+									try {
+										font_size = boost::lexical_cast<double>(tokens.back());
+									}
+									catch (...) {}
+								}
+
+								// @todo column or row?
+								double z_rotation = gp_Dir(trsf.HVectorialPart().Column(1)).AngleWithRef(gp_Dir(1., 0., 0.), gp_Dir(0., 0., 1.));
+								z_rotation *= 180. / M_PI;
+
+								util::string_buffer path;
+								// dominant-baseline="central" is not well supported in IE.
+								// so we add a 0.35 offset to the dy of the tspans
+								path.add("            <text text-anchor=\"left\" x=\"");
+								xcoords.push_back(path.add(v.X()));
+								path.add("\" y=\"");
+								ycoords.push_back(path.add(v.Y()));
+
+								path.add("\" transform=\"rotate(");
+								path.add(z_rotation);
+								path.add(" ");
+								xcoords.push_back(path.add(v.X()));
+								path.add(" ");
+								ycoords.push_back(path.add(v.Y()));
+								path.add(")\"");
+
+								if (font_size) {
+									path.add(" font-size=\"");
+									path.add(*font_size);
+									path.add("\"");
+								}
+								path.add(">");
+
+								std::vector<std::string> labels{ desc };
+
+								for (auto lit = labels.begin(); lit != labels.end(); ++lit) {
+									const auto& l = *lit;
+									double dy = labels.begin() == lit
+										? 0.0  // align bottom
+										: 1.0; // <- dy is relative to the previous text element, so
+											   //    always 1 for successive spans.
+									path.add("<tspan x=\"");
+									xcoords.push_back(path.add(v.X()));
+									path.add("\" dy=\"");
+									path.add(boost::lexical_cast<std::string>(dy));
+									path.add("em\">");
+									path.add(l);
+									path.add("</tspan>");
+								}
+
+								path.add("</text>");
+
+								po->second.push_back(path);
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
 void SvgSerializer::finalize() {
+	for (auto& p : drawing_metadata) {
+		addTextAnnotations(p.first);
+	}
+
 	for (auto& p : storey_hlr) {
 		draw_hlr(drawing_metadata[{p.first, ""}].pln_3d, { p.first, "" });
 	}

src/serializers/SvgSerializer.h

@@ -220,6 +220,7 @@ public:
 	void setDrawDoorArcs(bool b) { draw_door_arcs_ = b; }
 	void setStoreyHeightLineLength(double d) { storey_height_line_length_ = d; }
 	void setSpaceNameTransform(const std::string& v) { space_name_transform_ = v; }
+	void addTextAnnotations(const drawing_key& k);
 
 	std::array<std::array<double, 3>, 3> resize();
 	void resetScale();