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
|LayerAssignment||SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems||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.
|StyledByItem||SET [0:1] OF IfcStyledItem FOR Item||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.
ENTITY IfcTopologicalRepresentationItem ABSTRACT SUPERTYPE OF (ONEOF (IfcConnectedFaceSet ,IfcEdge ,IfcFace ,IfcFaceBound ,IfcLoop ,IfcPath ,IfcVertex)) SUBTYPE OF (IfcRepresentationItem); END_ENTITY;