IfcRepresentationContext

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcRepresentationContext			MODIFIED	Instantiation changed to ABSTRACT.

Semantic definitions at the entity

Entity definition

The IfcRepresentationContext defines the context to which the IfcRepresentation of a product is related.

NOTE Definition from ISO 10303-42
A representation context is a context in which a set of representation items are related.

NOTE Entity adapted from representation_context defined in ISO 10303-42.

HISTORY New entity in IFC1.5.

IFC4 CHANGE Entity made abstract, had been deprecated from instantiation since IFC2x2.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	ContextIdentifier	IfcLabel	?	The optional identifier of the representation context as used within a project.	X
2	ContextType	IfcLabel	?	The description of the type of a representation context. The supported values for context type are to be specified by implementers agreements.	X
	RepresentationsInContext	IfcRepresentation @ContextOfItems	S[0:?]	All shape representations that are defined in the same representation context.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRepresentationContext
1	ContextIdentifier	IfcLabel	?	The optional identifier of the representation context as used within a project.	X
2	ContextType	IfcLabel	?	The description of the type of a representation context. The supported values for context type are to be specified by implementers agreements.	X
	RepresentationsInContext	IfcRepresentation @ContextOfItems	S[0:?]	All shape representations that are defined in the same representation context.	X

Formal representations

XML Specification

 <xs:element name="IfcRepresentationContext" type="ifc:IfcRepresentationContext" abstract="true" substitutionGroup="ifc:Entity" nillable="true"/>

 <xs:complexType name="IfcRepresentationContext" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:Entity">

    <xs:attribute name="ContextIdentifier" type="ifc:IfcLabel" use="optional"/>

    <xs:attribute name="ContextType" type="ifc:IfcLabel" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRepresentationContext

 ABSTRACT SUPERTYPE OF(IfcGeometricRepresentationContext);

  ContextIdentifier : OPTIONAL IfcLabel;

  ContextType : OPTIONAL IfcLabel;

 INVERSE

  RepresentationsInContext : SET [0:?] OF IfcRepresentation FOR ContextOfItems;

END_ENTITY;

 EXPRESS-G diagram

	Repräsentationskontext
	Representation Context
	Contexte de représentation