Agreement on use of ParameterTakesPrecedence 

Based on          IFC2x3

Initiator            Official buildinSMART IFC2x3 CV2.0 certification programme

Effects              Coordination View 2.0

Date                    2013 09


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.

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