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.

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