diff --git a/src/blenderbim/blenderbim/bim/module/resource/__init__.py b/src/blenderbim/blenderbim/bim/module/resource/__init__.py
index 339e487b0b..38db174c0d 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/__init__.py
@@ -13,7 +13,7 @@ classes = (
     operator.ExpandResource,
     operator.ContractResource,
     operator.AssignResource,
-    operator.UnAssignResource,
+    operator.UnassignResource,
     prop.Resource,
     prop.BIMResourceProperties,
     prop.BIMResourceTreeProperties,
diff --git a/src/blenderbim/blenderbim/bim/module/resource/operator.py b/src/blenderbim/blenderbim/bim/module/resource/operator.py
index 10484876d5..979832532c 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/operator.py
@@ -30,10 +30,10 @@ class LoadResources(bpy.types.Operator):
         new.ifc_definition_id = related_object_id
         new.is_expanded = related_object_id not in self.contracted_resources
         new.level_index = level_index
-        if resource["RelatedObjects"]:
+        if resource["IsNestedBy"]:
             new.has_children = True
             if new.is_expanded:
-                for related_object_id in resource["RelatedObjects"]:
+                for related_object_id in resource["IsNestedBy"]:
                     self.create_new_resource_li(related_object_id, level_index + 1)
         return {"FINISHED"}
 
@@ -221,7 +221,7 @@ class AssignResource(bpy.types.Operator):
         return {"FINISHED"}
 
 
-class UnAssignResource(bpy.types.Operator):
+class UnassignResource(bpy.types.Operator):
     bl_idname = "bim.unassign_resource"
     bl_label = "Unassign Resource"
     resource: bpy.props.IntProperty()
diff --git a/src/blenderbim/blenderbim/bim/module/resource/ui.py b/src/blenderbim/blenderbim/bim/module/resource/ui.py
index 1259d5e39e..1544d3fd39 100644
--- a/src/blenderbim/blenderbim/bim/module/resource/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/resource/ui.py
@@ -116,7 +116,7 @@ class BIM_UL_resources(UIList):
             if context.active_object:
                 oprops = context.active_object.BIMObjectProperties
                 row = layout.row(align=True)
-                if oprops.ifc_definition_id in Data.resources[item.ifc_definition_id]["RelatedObjects"]:
+                if oprops.ifc_definition_id in Data.resources[item.ifc_definition_id]["ResourceOf"]:
                     op = row.operator("bim.unassign_resource", text="", icon="KEYFRAME_HLT", emboss=False)
                     op.resource = item.ifc_definition_id
                 else:
diff --git a/src/ifcopenshell-python/ifcopenshell/api/resource/data.py b/src/ifcopenshell-python/ifcopenshell/api/resource/data.py
index 702644529b..eec9223e6f 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/resource/data.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/resource/data.py
@@ -12,9 +12,12 @@ class Data:
         for resource in file.by_type("IfcResource"):
             data = resource.get_info()
             del data["OwnerHistory"]
-            data["RelatedObjects"] = []
+            data["IsNestedBy"] = []
             for rel in resource.IsNestedBy:
-                [data["RelatedObjects"].append(o.id()) for o in rel.RelatedObjects]
+                [data["IsNestedBy"].append(o.id()) for o in rel.RelatedObjects]
+            data["ResourceOf"] = []
+            for rel in resource.ResourceOf:
+                [data["ResourceOf"].append(o.id()) for o in rel.RelatedObjects]
             data["HasContext"] = resource.HasContext[0].RelatingContext.id() if resource.HasContext else None
             cls.resources[resource.id()] = data
         cls.is_loaded=True
diff --git a/src/ifcopenshell-python/ifcopenshell/api/resource/unassign_resource.py b/src/ifcopenshell-python/ifcopenshell/api/resource/unassign_resource.py
index 7faa264e21..07f38f47a5 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/resource/unassign_resource.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/resource/unassign_resource.py
@@ -1,4 +1,3 @@
-import ifcopenshell
 import ifcopenshell.api