ABSTRACT This definition may not be instantiated
18.104.22.168.1 Semantic definition
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.
22.214.171.124.2 Entity inheritance
|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.
126.96.36.199.4 Formal representation
ENTITY IfcPropertyAbstraction ABSTRACT SUPERTYPE OF (ONEOF (IfcExtendedProperties ,IfcPreDefinedProperties ,IfcProperty ,IfcPropertyEnumeration)); INVERSE HasExternalReferences : SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects; END_ENTITY;