NOTE This relationship is used to assign classification, library or document information to entities that do not inherit from IfcRoot. It has a similar functionality as the subtypes of IfcRelAssociates.
HISTORY New entity in IFC4.
|1||Name||OPTIONAL IfcLabel||A name used to identify or qualify the relationship.|
|2||Description||OPTIONAL IfcText||A description that may apply additional information about the relationship.|
|3||RelatingReference||IfcExternalReference||An external reference that can be used to tag an object within the range of IfcResourceObjectSelect.|
> NOTE External references can be a library reference (for example a dictionary or a catalogue reference), a classification reference, or a documentation reference.
|4||RelatedResourceObjects||SET [1:?] OF IfcResourceObjectSelect||Objects within the list of IfcResourceObjectSelect that can be tagged by an external reference to a dictionary, library, catalogue, classification or documentation.|
ENTITY IfcExternalReferenceRelationship SUBTYPE OF (IfcResourceLevelRelationship); RelatingReference : IfcExternalReference; RelatedResourceObjects : SET [1:?] OF IfcResourceObjectSelect; END_ENTITY;