IfcDocumentInformationRelationship
实体定义
IfcDocumentInformationRelationship是一种关系实体，它使文档能够引用其他文档。它用于描述一个文档可以引用一个或多个其他子文档的关系，或者一个文档用作另一个文档的替换（但原始文档和替换文档都需要保留）。
IFC2x中的新实体。
IFC4从IFCRSourceLevel关系更改子类型，属性的顺序已更改。
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 |
EXPRESS Specification
ENTITY IfcResourceLevelRelationship
ABSTRACT SUPERTYPE OF(ONEOF(IfcApprovalRelationship, IfcCurrencyRelationship, IfcDocumentInformationRelationship, IfcExternalReferenceRelationship, IfcMaterialRelationship, IfcOrganizationRelationship, IfcPropertyDependencyRelationship, IfcResourceApprovalRelationship, IfcResourceConstraintRelationship));
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
END_ENTITY;
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