IFC 4.3.1.0 (IFC4X3_ADD1) development

# 8.6.3.4 IfcDocumentInformationRelationship

## 8.6.3.4.1 Semantic definition

An IfcDocumentInformationRelationship is a relationship entity that enables a document to have the ability to reference other documents. It is used to describe relationships in which one document may reference one or more other sub documents or where a document is used as a replacement for another document (but where both the original and the replacing document need to be retained).

## 8.6.3.4.4 Formal representation

ENTITY IfcDocumentInformationRelationship
SUBTYPE OF (IfcResourceLevelRelationship);
RelatingDocument : IfcDocumentInformation;
RelatedDocuments : SET [1:?] OF IfcDocumentInformation;
RelationshipType : OPTIONAL IfcLabel;
END_ENTITY;

## 8.6.3.4.5 References

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