Ceilings modelled with curtain walls to IfcCoveting.CEILING

In Revit you can model Roofs and ceilings with curtain walls or curtain systems, however it looks like it is not possible to map them to IfcRoof or IfcCovering.

Start by reproducing the Revit case described: model a roof or ceiling with a curtain wall or curtain system and inspect the IFC export. Trace the existing mapping for these elements and verify that ceiling cases can be represented as IfcRoof or IfcCovering with the CEILING predefined type; done means the exported IFC uses the intended classification.

Written by the indexing model from the issue text.