IfcRelAssociatesLibrary

BACnet MVD

#### IfcRelAssociatesLibrary

Natural language names

| Ordnet Bibliothek zu - Relation
| Rel Associates Library
| Association à librairie

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRelAssociatesLibrary |  |  |  |
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.
RelatedObjects | X | X | MODIFIED | Type changed from IfcRoot to IfcDefinitionSelect.

##### Semantic definitions at the entity

Entity definition

The objectified relationship (IfcRelAssociatesLibrary) handles the assignment of a library item (items of the select IfcLibrarySelect) to subtypes of IfcObjectDefinition or IfcPropertyDefinition.

The relationship is used to assign a library reference or a more detailed link to a library information to objects, property sets or types. A single library reference can be applied to multiple items.

The inherited attribute RelatedObjects define the items to which the library association is applied. The attribute RelatingLibrary is the reference to a library reference, applied to the item(s).

> HISTORY New entity in IFC2x.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
6 | RelatingLibrary | IfcLibrarySelect |  | Reference to a library, from which the definition of the property set is taken. | X | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

IfcOwnerHistory

?

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

> NOTE only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGE The attribute has been changed to be OPTIONAL.

X

X

3 | Name | IfcLabel | ? | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X | X
4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. |  | X
IfcRelationship
IfcRelAssociates

5

RelatedObjects

IfcDefinitionSelect

S[1:?]

Set of object or property definitions to which the external references or information is associated. It includes object and type objects, property set templates, property templates and property sets and contexts.

> IFC4 CHANGE The attribute datatype has been changed from IfcRoot to IfcDefinitionSelect.

X

X

IfcRelAssociatesLibrary
6 | RelatingLibrary | IfcLibrarySelect |  | Reference to a library, from which the definition of the property set is taken. | X | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Examples

- Air terminal element

##### Formal representations

XML Specification
`<xs:element name="IfcRelAssociatesLibrary" type="ifc:IfcRelAssociatesLibrary" substitutionGroup="ifc:IfcRelAssociates" nillable="true"/>
<xs:complexType name="IfcRelAssociatesLibrary">
<xs:complexContent>
<xs:extension base="ifc:IfcRelAssociates">
<xs:sequence>
<xs:element name="RelatingLibrary">
<xs:complexType>
<xs:group ref="ifc:IfcLibrarySelect"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcRelAssociatesLibrary
SUBTYPE OF (IfcRelAssociates);
RelatingLibrary : IfcLibrarySelect;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcLibraryInformation IfcLibraryReference

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