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Agreement on use of ParameterTakesPrecedence
number CV-2x3-181
based on IFC2x3
effects IFC2x3 coordination view 2.0
date Sep 2013
initiator official buildingSMART certification 2.0 program
summary Agreement on use of ParameterTakesPrecedence




Within the IFC2x3 Coordination View 2.0 each door and window shall have an explicit shape representation, and one should not rely on the lining and panel parameters, added. Those shall only be used for informational purposes.

Therefore it is agreed:

  • for IfcWindow and IfcDoor - the parameter “ParameterTakesPrecedence” is always FALSE and explicit geometry of the IfcWindow and IfcDoor is always provided.
  • for backward compatibility, a receiving application can always assume “ParameterTakesPrecedence” is interpreted as FALSE, even if the files indicates a TRUE or NULL value, and lining and panel parameters are attached.