IFC 4.3.x development IfcTopologicalRepresentationItem Semantic definitions at the entity

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

# Attribute Type Description
LayerAssignmentSET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItemsAssignment 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 inheritance

dot_inheritance IfcTopologicalRepresentationItem_children 6 more... IfcTopologicalRepresentationItem IfcTopologicalRepresentationItem IfcTopologicalRepresentationItem_children->IfcTopologicalRepresentationItem IfcRepresentationItem IfcRepresentationItem IfcTopologicalRepresentationItem->IfcRepresentationItem IfcRepresentationItem_children 3 more... IfcRepresentationItem_children->IfcRepresentationItem Formal representations

ENTITY IfcTopologicalRepresentationItem
 SUBTYPE OF (IfcRepresentationItem);