diff --git a/src/blenderbim/blenderbim/bim/ifc.py b/src/blenderbim/blenderbim/bim/ifc.py
index f8a3f978ff..0940ea7a2e 100644
--- a/src/blenderbim/blenderbim/bim/ifc.py
+++ b/src/blenderbim/blenderbim/bim/ifc.py
@@ -1,5 +1,5 @@
 # BlenderBIM Add-on - OpenBIM Blender Add-on
-# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+# Copyright (C) 2020, 2021, 2022 Dion Moult <dion@thinkmoult.com>
 #
 # This file is part of BlenderBIM Add-on.
 #
@@ -47,6 +47,7 @@ class IfcStore:
     last_transaction = ""
     history = []
     future = []
+    schema_identifiers = ["IFC4", "IFC2X3"]
 
     @staticmethod
     def purge():
@@ -63,6 +64,7 @@ class IfcStore:
         IfcStore.pset_template_file = None
         IfcStore.library_path = ""
         IfcStore.library_file = None
+        IfcStore.schema_identifiers = ["IFC4", "IFC2X3"]
 
     @staticmethod
     def get_file():
diff --git a/src/blenderbim/blenderbim/bim/module/debug/__init__.py b/src/blenderbim/blenderbim/bim/module/debug/__init__.py
index 47e3d6fdda..74bfcc9b07 100644
--- a/src/blenderbim/blenderbim/bim/module/debug/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/debug/__init__.py
@@ -20,18 +20,20 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
-    operator.PrintIfcFile,
-    operator.PurgeIfcLinks,
-    operator.PrintObjectPlacement,
-    operator.ValidateIfcFile,
-    operator.ProfileImportIFC,
     operator.CreateAllShapes,
     operator.CreateShapeFromStepId,
+    operator.InspectFromObject,
+    operator.InspectFromStepId,
+    operator.ParseExpress,
+    operator.PrintIfcFile,
+    operator.PrintObjectPlacement,
+    operator.ProfileImportIFC,
+    operator.PurgeIfcLinks,
+    operator.RewindInspector,
+    operator.SelectExpressFile,
     operator.SelectHighPolygonMeshes,
     operator.SelectHighestPolygonMeshes,
-    operator.InspectFromStepId,
-    operator.InspectFromObject,
-    operator.RewindInspector,
+    operator.ValidateIfcFile,
     prop.BIMDebugProperties,
     ui.BIM_PT_debug,
 )
diff --git a/src/blenderbim/blenderbim/bim/module/debug/operator.py b/src/blenderbim/blenderbim/bim/module/debug/operator.py
index 7b7bb9d803..d564943e72 100644
--- a/src/blenderbim/blenderbim/bim/module/debug/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/debug/operator.py
@@ -16,14 +16,18 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
+import os
 import bpy
 import time
 import logging
 import ifcopenshell
 import ifcopenshell.util.placement
 import ifcopenshell.util.representation
+import blenderbim.tool as tool
+import blenderbim.core.debug as core
 import blenderbim.bim.handler
 import blenderbim.bim.import_ifc as import_ifc
+import blenderbim.tool as tool
 from blenderbim.bim.ifc import IfcStore
 
 
@@ -296,3 +300,31 @@ class PrintObjectPlacement(bpy.types.Operator):
     def execute(self, context):
         print(ifcopenshell.util.placement.get_local_placement(IfcStore.get_file().by_id(self.step_id)))
         return {"FINISHED"}
+
+
+class ParseExpress(bpy.types.Operator):
+    bl_idname = "bim.parse_express"
+    bl_label = "Parse Express"
+
+    def execute(self, context):
+        core.parse_express(tool.Debug, context.scene.BIMDebugProperties.express_file)
+        blenderbim.bim.handler.refresh_ui_data()
+        return {"FINISHED"}
+
+
+class SelectExpressFile(bpy.types.Operator):
+    bl_idname = "bim.select_express_file"
+    bl_label = "Select Express File"
+    bl_options = {"REGISTER", "UNDO"}
+    bl_description = "Select an IFC EXPRESS definition"
+    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
+    filter_glob: bpy.props.StringProperty(default="*.exp", options={"HIDDEN"})
+
+    def execute(self, context):
+        if os.path.exists(self.filepath) and "exp" in os.path.splitext(self.filepath)[1]:
+            context.scene.BIMDebugProperties.express_file = self.filepath
+        return {"FINISHED"}
+
+    def invoke(self, context, event):
+        context.window_manager.fileselect_add(self)
+        return {"RUNNING_MODAL"}
diff --git a/src/blenderbim/blenderbim/bim/module/debug/prop.py b/src/blenderbim/blenderbim/bim/module/debug/prop.py
index bfff95ef20..08e7699a61 100644
--- a/src/blenderbim/blenderbim/bim/module/debug/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/debug/prop.py
@@ -39,3 +39,4 @@ class BIMDebugProperties(PropertyGroup):
     attributes: CollectionProperty(name="Attributes", type=Attribute)
     inverse_attributes: CollectionProperty(name="Inverse Attributes", type=Attribute)
     inverse_references: CollectionProperty(name="Inverse References", type=Attribute)
+    express_file: StringProperty(name="Express File")
diff --git a/src/blenderbim/blenderbim/bim/module/debug/ui.py b/src/blenderbim/blenderbim/bim/module/debug/ui.py
index 1a70377a28..22030d3e37 100644
--- a/src/blenderbim/blenderbim/bim/module/debug/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/debug/ui.py
@@ -38,6 +38,11 @@ class BIM_PT_debug(Panel):
         row.operator("bim.validate_ifc_file", icon="CHECKMARK", text="")
         row.operator("bim.select_ifc_file", icon="FILE_FOLDER", text="")
 
+        row = self.layout.row(align=True)
+        row.prop(props, "express_file", text="")
+        row.operator("bim.parse_express", icon="IMPORT", text="")
+        row.operator("bim.select_express_file", icon="FILE_FOLDER", text="")
+
         row = layout.row()
         row.operator("bim.print_ifc_file")
 
diff --git a/src/blenderbim/blenderbim/bim/module/project/data.py b/src/blenderbim/blenderbim/bim/module/project/data.py
new file mode 100644
index 0000000000..1fe5e85226
--- /dev/null
+++ b/src/blenderbim/blenderbim/bim/module/project/data.py
@@ -0,0 +1,39 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import blenderbim.tool as tool
+from blenderbim.bim.ifc import IfcStore
+
+
+def refresh():
+    ProjectData.is_loaded = False
+
+
+class ProjectData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {"export_schema": cls.get_export_schema()}
+        cls.is_loaded = True
+
+    @classmethod
+    def get_export_schema(cls):
+        return [(s, s, "") for s in IfcStore.schema_identifiers]
diff --git a/src/blenderbim/blenderbim/bim/module/project/operator.py b/src/blenderbim/blenderbim/bim/module/project/operator.py
index 3aa5423207..fb683d88af 100644
--- a/src/blenderbim/blenderbim/bim/module/project/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/project/operator.py
@@ -57,7 +57,7 @@ class CreateProject(bpy.types.Operator):
             return {"FINISHED"}
 
         IfcStore.file = ifcopenshell.api.run(
-            "project.create_file", **{"version": context.scene.BIMProperties.export_schema}
+            "project.create_file", **{"version": context.scene.BIMProjectProperties.export_schema}
         )
         self.file = IfcStore.get_file()
 
diff --git a/src/blenderbim/blenderbim/bim/module/project/prop.py b/src/blenderbim/blenderbim/bim/module/project/prop.py
index f5343d89fe..1db22e940c 100644
--- a/src/blenderbim/blenderbim/bim/module/project/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/project/prop.py
@@ -18,18 +18,26 @@
 
 import bpy
 import ifcopenshell.util.placement
+from blenderbim.bim.module.project.data import ProjectData
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty
 from bpy.types import PropertyGroup
 from bpy.props import (
-    StringProperty,
     BoolProperty,
+    CollectionProperty,
+    EnumProperty,
     FloatProperty,
     IntProperty,
-    CollectionProperty,
+    StringProperty,
 )
 
 
+def get_export_schema(self, context):
+    if not ProjectData.is_loaded:
+        ProjectData.load()
+    return ProjectData.data["export_schema"]
+
+
 def update_filter_mode(self, context):
     self.filter_categories.clear()
     if self.filter_mode == "NONE":
@@ -123,6 +131,7 @@ class BIMProjectProperties(PropertyGroup):
     model_offset_coordinates: StringProperty(name="Model Offset Coordinates", default="0,0,0")
     links: CollectionProperty(name="Links", type=Link)
     active_link_index: IntProperty(name="Active Link Index")
+    export_schema: EnumProperty(items=get_export_schema, name="IFC Schema")
 
     def get_library_element_index(self, lib_element):
         return next((i for i in range(len(self.library_elements)) if self.library_elements[i] == lib_element))
diff --git a/src/blenderbim/blenderbim/bim/module/project/ui.py b/src/blenderbim/blenderbim/bim/module/project/ui.py
index de3ba45f37..4a8e924006 100644
--- a/src/blenderbim/blenderbim/bim/module/project/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/project/ui.py
@@ -19,6 +19,7 @@
 import os
 from bpy.types import Panel, UIList
 from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.project.data import ProjectData
 
 
 class BIM_PT_project(Panel):
@@ -29,6 +30,9 @@ class BIM_PT_project(Panel):
     bl_context = "scene"
 
     def draw(self, context):
+        if not ProjectData.is_loaded:
+            ProjectData.load()
+
         self.layout.use_property_decorate = False
         self.layout.use_property_split = True
         props = context.scene.BIMProperties
@@ -148,8 +152,9 @@ class BIM_PT_project(Panel):
 
     def draw_create_project_ui(self, context):
         props = context.scene.BIMProperties
+        pprops = context.scene.BIMProjectProperties
         row = self.layout.row()
-        row.prop(props, "export_schema")
+        row.prop(pprops, "export_schema")
         row = self.layout.row()
         row.prop(context.scene.unit_settings, "system")
         row = self.layout.row()
diff --git a/src/blenderbim/blenderbim/bim/prop.py b/src/blenderbim/blenderbim/bim/prop.py
index 4145642be1..397e991e7d 100644
--- a/src/blenderbim/blenderbim/bim/prop.py
+++ b/src/blenderbim/blenderbim/bim/prop.py
@@ -248,7 +248,6 @@ class BIMProperties(PropertyGroup):
         default=os.path.join(cwd, "data") + os.path.sep, name="Data Directory", update=update_data_dir
     )
     ifc_file: StringProperty(name="IFC File", update=update_ifc_file)
-    export_schema: EnumProperty(items=[("IFC4", "IFC4", ""), ("IFC2X3", "IFC2X3", "")], name="IFC Schema")
     last_transaction: StringProperty(name="Last Transaction")
     should_section_selected_objects: BoolProperty(name="Section Selected Objects", default=False)
     section_plane_colour: FloatVectorProperty(
diff --git a/src/blenderbim/blenderbim/core/debug.py b/src/blenderbim/blenderbim/core/debug.py
new file mode 100644
index 0000000000..6e3970499b
--- /dev/null
+++ b/src/blenderbim/blenderbim/core/debug.py
@@ -0,0 +1,21 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+
+def parse_express(debug, filename):
+    debug.add_schema_identifier(debug.load_express(filename))
diff --git a/src/blenderbim/blenderbim/core/tool.py b/src/blenderbim/blenderbim/core/tool.py
index d3221a94af..29ceb85880 100644
--- a/src/blenderbim/blenderbim/core/tool.py
+++ b/src/blenderbim/blenderbim/core/tool.py
@@ -82,6 +82,12 @@ class Context:
     def set_context(cls, context): pass
 
 
+@interface
+class Debug:
+    def add_schema_identifier(cls, schema): pass
+    def load_express(cls, filename): pass
+
+
 @interface
 class Drawing:
     def disable_editing_text(cls, obj): pass
diff --git a/src/blenderbim/blenderbim/tool/__init__.py b/src/blenderbim/blenderbim/tool/__init__.py
index 7de559ecbe..ffb79aecbb 100644
--- a/src/blenderbim/blenderbim/tool/__init__.py
+++ b/src/blenderbim/blenderbim/tool/__init__.py
@@ -21,6 +21,7 @@ from blenderbim.tool.blender import Blender
 from blenderbim.tool.brick import Brick
 from blenderbim.tool.collector import Collector
 from blenderbim.tool.context import Context
+from blenderbim.tool.debug import Debug
 from blenderbim.tool.drawing import Drawing
 from blenderbim.tool.geometry import Geometry
 from blenderbim.tool.ifc import Ifc
diff --git a/src/blenderbim/blenderbim/tool/debug.py b/src/blenderbim/blenderbim/tool/debug.py
new file mode 100644
index 0000000000..17d0a7ee41
--- /dev/null
+++ b/src/blenderbim/blenderbim/tool/debug.py
@@ -0,0 +1,34 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import ifcopenshell.express
+import blenderbim.core.tool
+from blenderbim.bim.ifc import IfcStore
+
+
+class Debug(blenderbim.core.tool.Debug):
+    @classmethod
+    def add_schema_identifier(cls, schema):
+        IfcStore.schema_identifiers.append(schema.schema_name)
+
+    @classmethod
+    def load_express(cls, filename):
+        schema = ifcopenshell.express.parse(filename)
+        ifcopenshell.register_schema(schema)
+        return schema
diff --git a/src/blenderbim/pytest.ini b/src/blenderbim/pytest.ini
index d66974581a..8e1e234f3f 100644
--- a/src/blenderbim/pytest.ini
+++ b/src/blenderbim/pytest.ini
@@ -5,6 +5,7 @@ markers =
     bimtester
     brick
     context
+    debug
     drawing
     geometry
     library
diff --git a/src/blenderbim/test/bim/feature/debug.feature b/src/blenderbim/test/bim/feature/debug.feature
new file mode 100644
index 0000000000..904d69c1ce
--- /dev/null
+++ b/src/blenderbim/test/bim/feature/debug.feature
@@ -0,0 +1,13 @@
+@debug
+Feature: Debug
+
+Scenario: Select express file
+    Given an empty Blender session
+    When I press "bim.select_express_file(filepath='{cwd}/test/files/test.exp')"
+    Then nothing happens
+
+Scenario: Parse express
+    Given an empty Blender session
+    And I press "bim.select_express_file(filepath='{cwd}/test/files/test.exp')"
+    When I press "bim.parse_express"
+    Then nothing happens
diff --git a/src/blenderbim/test/core/bootstrap.py b/src/blenderbim/test/core/bootstrap.py
index 895cde0335..3ee75fef62 100644
--- a/src/blenderbim/test/core/bootstrap.py
+++ b/src/blenderbim/test/core/bootstrap.py
@@ -63,6 +63,13 @@ def context():
     prophet.verify()
 
 
+@pytest.fixture
+def debug():
+    prophet = Prophecy(blenderbim.core.tool.Debug)
+    yield prophet
+    prophet.verify()
+
+
 @pytest.fixture
 def drawing():
     prophet = Prophecy(blenderbim.core.tool.Drawing)
diff --git a/src/blenderbim/test/core/test_debug.py b/src/blenderbim/test/core/test_debug.py
new file mode 100644
index 0000000000..6a0278b840
--- /dev/null
+++ b/src/blenderbim/test/core/test_debug.py
@@ -0,0 +1,27 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import blenderbim.core.debug as subject
+from test.core.bootstrap import debug
+
+
+class TestParseExpress:
+    def test_run(self, debug):
+        debug.load_express("filename").should_be_called().will_return("schema")
+        debug.add_schema_identifier("schema").should_be_called()
+        subject.parse_express(debug, "filename")
diff --git a/src/blenderbim/test/files/test.exp b/src/blenderbim/test/files/test.exp
new file mode 100644
index 0000000000..23937a8ce8
--- /dev/null
+++ b/src/blenderbim/test/files/test.exp
@@ -0,0 +1,19 @@
+SCHEMA IFCROGUE;
+
+TYPE IfcDonkeyPowerMeasure = REAL;
+END_TYPE;
+
+TYPE IfcLabel = STRING(255);
+END_TYPE;
+
+ENTITY IfcBurbRoot
+ SUBTYPE OF (IfcRoot);
+	AcidDamage : OPTIONAL IfcDonkeyPowerMeasure;
+END_ENTITY;
+
+ENTITY IfcRoot
+ ABSTRACT SUPERTYPE OF (IfcBurbRoot);
+	Name : OPTIONAL IfcLabel;
+END_ENTITY;
+
+END_SCHEMA;
diff --git a/src/blenderbim/test/tool/test_debug.py b/src/blenderbim/test/tool/test_debug.py
new file mode 100644
index 0000000000..1ada44ad5f
--- /dev/null
+++ b/src/blenderbim/test/tool/test_debug.py
@@ -0,0 +1,45 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import bpy
+import ifcopenshell
+import blenderbim.core.tool
+import blenderbim.tool as tool
+from test.bim.bootstrap import NewFile
+from blenderbim.tool.debug import Debug as subject
+from blenderbim.bim.ifc import IfcStore
+
+
+class TestImplementsTool(NewFile):
+    def test_run(self):
+        assert isinstance(subject(), blenderbim.core.tool.Debug)
+
+
+class TestAddSchemaIdentifier(NewFile):
+    def test_run(self):
+        subject.add_schema_identifier(TestLoadExpress().test_run())
+        assert IfcStore.schema_identifiers[-1] == "IFCROGUE"
+
+
+class TestLoadExpress(NewFile):
+    def test_run(self):
+        cwd = os.path.dirname(os.path.realpath(__file__))
+        schema = subject.load_express(os.path.join(cwd, "..", "files", "test.exp"))
+        assert schema.schema_name == "IFCROGUE"
+        return schema