IfcExternalReferenceRelationship

IfcExternalReferenceRelationship

IfcExternalReferenceRelationship是一个关系实体，它使IfcResourceObjectSelect中的对象能够被外部引用标记。

 

注意：此关系用于将分类、库或文档信息分配给不从IfcRoot继承的实体。它与IfcRelAssociates的子类型具有类似的功能。

IFC4中的新实体。

 

 

 

 

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcResourceLevelRelationship
1	Name	IfcLabel	[0:1]	A name used to identify or qualify the relationship.	X
2	Description	IfcText	[0:1]	A description that may apply additional information about the relationship.	X
IfcExternalReferenceRelationship
3	RelatingReference	IfcExternalReference	[1:1]	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.	X
4	RelatedResourceObjects	IfcResourceObjectSelect	S[1:?]	Objects within the list of IfcResourceObjectSelect that can be tagged by an external reference to a dictionary, library, catalogue, classification or documentation.	X

 

EXPRESS Specification

ENTITY IfcExternalReferenceRelationship
 SUBTYPE OF (IfcResourceLevelRelationship);
  RelatingReference : IfcExternalReference;
  RelatedResourceObjects : SET [1:?] OF IfcResourceObjectSelect;
END_ENTITY;

 

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