The IfcPropertyAbstraction is an abstract supertype of all property related entities defined as dependent resource entities within the specification. It may have an external reference to a dictionary or library that provides additional information about its definition. Instantiable subtypes have property name, value and other instance information.
HISTORY New entity in IFC4.
|HasExternalReferences||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.|
> IFC4 CHANGE New inverse attribute.
ENTITY IfcPropertyAbstraction ABSTRACT SUPERTYPE OF (ONEOF (IfcExtendedProperties ,IfcPreDefinedProperties ,IfcProperty ,IfcPropertyEnumeration)); INVERSE HasExternalReferences : SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects; END_ENTITY;