WIP implement most of the document module apart from object references. See #1222.

src/ifcblenderexport/blenderbim/bim/module/document/prop.py

@@ -0,0 +1,26 @@
+import bpy
+from blenderbim.bim.prop import StrProperty, Attribute
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+class Document(PropertyGroup):
+    name: StringProperty(name="Name")
+    identification: StringProperty(name="Identification")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
+class BIMDocumentProperties(PropertyGroup):
+    document_attributes: CollectionProperty(name="Document Attributes", type=Attribute)
+    active_document_id: IntProperty(name="Active Document Id")
+    documents: CollectionProperty(name="Documents", type=Document)
+    active_document_index: IntProperty(name="Active Document Index")
+    is_editing: StringProperty(name="Is Editing")