IfcExternalInformation

BACnet MVD

#### IfcExternalInformation

Natural language names

| Externe Information
| External Information

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcExternalInformation |  |  | ADDED |

##### Semantic definitions at the entity

Entity definition

An IfcExternalInformation is the identification of an information source that is not explicitly represented in the current model or in the project database (as an implementation of the current model). The IfcExternalInformation identifies the external source (classification, document, or library), but not the particular items such as a dictionary entry, a classification notation, or a document reference within the external source

The IfcExternalInformation is an abstract supertype of all external information entities.

> HISTORY New entity in IFC4.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcExternalInformation

##### Formal representations

XML Specification
`<xs:element name="IfcExternalInformation" type="ifc:IfcExternalInformation" abstract="true" substitutionGroup="ifc:Entity" nillable="true"/>
<xs:complexType name="IfcExternalInformation" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:Entity"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcExternalInformation
ABSTRACT SUPERTYPE OF(ONEOF(IfcClassification, IfcDocumentInformation, IfcLibraryInformation));
END_ENTITY;

EXPRESS-G diagram

`

References: IfcResourceObjectSelect

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