I need to export curtain walls from Revit to IFC in order to delivery COBie data. The problem is that while Revit uses different categories to manage curtain walls (curtain wall systems, curtain walls panels, curtain walls mullions), the only IFC entity which is used to define curtain walls is IfcCurtainWall. Since my purpose is to export COBie data from the IFC model, the curtain walls' elements can't be described with the same IFC category. So, have you got any suggestions regarding which IFC entity I have to associate to each Revit category of the curtain wall? (I know this is possible by setting the export properties in Revit)
Thank you very much,