Natural language names
Topologische Repräsentation - Element
Topological Representation Item
Item de représentation topologique
Semantic definitions at the entity
Entity definition

NOTE  Definition according to ISO/CD 10303-42:1992
The topological representation item is the supertype for all the topological representation items in the geometry resource.
NOTE  Entity adapted from topological_representation_item defined in ISO 10303-42.
HISTORY  New entity in IFC1.5
Inherited definitions from supertypes
Entity inheritance IfcConnectedFaceSet IfcEdge IfcFace IfcFaceBound IfcLoop IfcPath IfcVertex IfcRepresentationItem
Attribute inheritance
S[0:1]Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.
IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added.
IFC4 CHANGE  The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
S[0:1]Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.
Formal representations
XML Specification
 <xs:element name="IfcTopologicalRepresentationItem" type="ifc:IfcTopologicalRepresentationItem" abstract="true" substitutionGroup="ifc:IfcRepresentationItem" nillable="true"/>
 <xs:complexType name="IfcTopologicalRepresentationItem" abstract="true">
   <xs:extension base="ifc:IfcRepresentationItem"/>
EXPRESS Specification
ENTITY IfcTopologicalRepresentationItem
 ABSTRACT SUPERTYPE OF(ONEOF(IfcConnectedFaceSet, IfcEdge, IfcFace, IfcFaceBound, IfcLoop, IfcPath, IfcVertex))
 SUBTYPE OF (IfcRepresentationItem);

Link to EXPRESS-G diagram EXPRESS-G diagram

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