WIP migrate types to partial editing. See #1222.

src/ifcblenderexport/blenderbim/bim/ifc.py

@@ -5,6 +5,7 @@ import ifcopenshell
 class IfcStore:
     path = ""
     file = None
+    schema = None
     pset_template_path = ""
     pset_template_file = None
 
@@ -15,3 +16,11 @@ class IfcStore:
             if IfcStore.path:
                 IfcStore.file = ifcopenshell.open(IfcStore.path)
         return IfcStore.file
+
+    @staticmethod
+    def get_schema():
+        if IfcStore.file is None:
+            return
+        elif IfcStore.schema is None:
+            IfcStore.schema = ifcopenshell.ifcopenshell_wrapper.schema_by_name(IfcStore.file.schema)
+        return IfcStore.schema