IfcRepresentationContext

Semantic definitions at the entity

Entity definition

Definition from ISO/CD 10303-42:1992: A representation context is a context in which a set of representation items are related.

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

NOTE The definition of this class relates to the STEP entity representation_context. Please refer to ISO/IS 10303-43:1994 for the final definition of the formal standard.

HISTORY New entity in IFC Release 1.5.
IFC2x Edition 3 NOTE Users should not instantiate the entity IfcRepresentationContext from IFC2x Edition 2 onwards. It will be changed into an ABSTRACT supertype in future releases of IFC.

Attribute definitions

#	Attribute	Type	Cardinality	Description	A
1	ContextIdentifier	IfcLabel	[0:1]	The optional identifier of the representation context as used within a project.	X
2	ContextType	IfcLabel	[0:1]	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.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	A
IfcRepresentationContext
1	ContextIdentifier	IfcLabel	[0:1]	The optional identifier of the representation context as used within a project.	X
2	ContextType	IfcLabel	[0:1]	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.

Formal representations

XSD Specification

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

 <xs:complexType name="IfcRepresentationContext">

  <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

 SUPERTYPE OF(IfcGeometricRepresentationContext);

  ContextIdentifier : OPTIONAL IfcLabel;

  ContextType : OPTIONAL IfcLabel;

 INVERSE

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

END_ENTITY;

 EXPRESS-G diagram