Number of doors and windows within one opening is restricted to max 1.

Based on          IFC2x2, IFC2x3

Initiator            ISG Meeting-Berlin

Effects              Extended Coordination View

Date                    2006 02 24


Each IfcOpeningElement shall only have zero or one filling. For door and window combinations (an opening with more then one window, door, or window and door), there are two possibilities:

    * export it as one filling with a brep geometry containing all windows/ doors (multiple IfcFacetedBrep's are allowed as shape representation of IfcDoor or IfcWindow)

    * export each window and door with a separate, but joining, opening element

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