Agreement on providing a presentation layer for doors and windows based on parametric description
Based on IFC2x3
Initiator ISG Meeting-Helsinki
Effects Extended Coordination View
Date 2007 05 23
Since the change from using the Pset_Draughting to using the IfcPresentationLayerAssignment - see also CV-2x3-109 - standard, and parametrically defined, IfcDoor and IfcWindow instances cannot hold the presentation layer information (as IfcPresentationLayerAssignment is assigned to IfcShapeRepresentation, and not to IfcElement (and subtypes).
To overcome the situation, each instance of IfcDoor and IfcWindow, that only have parametric representation, should also include an 'Profile' shape representation, as agreed in CV-2x3-103. The 'Profile' shape representation would then be included in the set of AssignedItems of IfcPresentationLayerAssignment.