IfcDocumentInformationRelationship

BACnet MVD

#### IfcDocumentInformationRelationship

Natural language names

| Dokumenteninformation - Relation
| Document Information Relationship
| Relation entre un document et des documents associés

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcDocumentInformationRelationship |  |  |  |
Name | X | X | MODIFIED | Name changed from RelatingDocument to Name. Type changed from IfcDocumentInformation to IfcLabel. Instantiation changed to OPTIONAL.
Description | X | X | MODIFIED | Name changed from RelatedDocuments to Description. Type changed from IfcDocumentInformation to IfcText. Instantiation changed to OPTIONAL. Aggregation changed from SET to NONE.
RelatingDocument | X | X | MODIFIED | Name changed from RelationshipType to RelatingDocument. Type changed from IfcLabel to IfcDocumentInformation. Instantiation changed from OPTIONAL.
RelatedDocuments |  |  | ADDED |
RelationshipType |  |  | ADDED |

##### Semantic definitions at the entity

Entity 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).

> HISTORY New entity in IFC2x.

> IFC4 CHANGE Subtyped from IfcResourceLevelRelationship, order of attributes changed.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
3 | RelatingDocument | IfcDocumentInformation |  | The document that acts as the parent, referencing or original document in a relationship. |  | X
4 | RelatedDocuments | IfcDocumentInformation | S[1:?] | The document that acts as the child, referenced or replacing document in a relationship. |  | X
5 | RelationshipType | IfcLabel | ? | Describes the type of relationship between documents. This could be sub-document, replacement etc. The interpretation has to be established in an application context. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcResourceLevelRelationship
1 | Name | IfcLabel | ? | A name used to identify or qualify the relationship. |  | X
2 | Description | IfcText | ? | A description that may apply additional information about the relationship. |  | X
IfcDocumentInformationRelationship
3 | RelatingDocument | IfcDocumentInformation |  | The document that acts as the parent, referencing or original document in a relationship. |  | X
4 | RelatedDocuments | IfcDocumentInformation | S[1:?] | The document that acts as the child, referenced or replacing document in a relationship. |  | X
5 | RelationshipType | IfcLabel | ? | Describes the type of relationship between documents. This could be sub-document, replacement etc. The interpretation has to be established in an application context. |  | X

##### Formal representations

XML Specification
`<xs:element name="IfcDocumentInformationRelationship" type="ifc:IfcDocumentInformationRelationship" substitutionGroup="ifc:IfcResourceLevelRelationship" nillable="true"/>
<xs:complexType name="IfcDocumentInformationRelationship">
<xs:complexContent>
<xs:extension base="ifc:IfcResourceLevelRelationship">
<xs:sequence>
<xs:element name="RelatingDocument" type="ifc:IfcDocumentInformation" nillable="true"/>
<xs:element name="RelatedDocuments">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcDocumentInformation" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcDocumentInformation"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="RelationshipType" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcDocumentInformationRelationship
SUBTYPE OF (IfcResourceLevelRelationship);
RelatingDocument : IfcDocumentInformation;
RelatedDocuments : SET [1:?] OF IfcDocumentInformation;
RelationshipType : OPTIONAL IfcLabel;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcDocumentInformation

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