Exporting to IFC with composed parts



Hi, I am trying to export my model to ifc format that retains the model component structure.

Door (ifcDoor)
- Door Leaf (ifcMember)
- Door Frame (ifcPlate)

If I classify the subcomponents as well as the top component then only the 2 subcomponents are exported, if I don’t classify the subcomponents then the top level component is exported.

I know that IFC standards allow for an object to be decomposed with things like curtain walls and provides relationships attributes for this.

Is there any way to apply this relationship model to retain the hierarchy on export.

Any help would be appreciated.