8.20.3.16 IfcSubedge
8.20.3.16.1 Semantic definition
Definition according to ISO/CD 10303-42:1992 A subedge is an edge whose domain is a connected portion of the domain of an existing edge. The topological constraints on a subedge are the same as those on an edge. Entity adapted from subedge defined in ISO 10303-42. New entity in IFC2x2.Informal Propositions
- The domain of the subedge is formally defined to be the domain of the parent edge, as trimmed by the subedge start vertex and subedge end vertex.
- The start vertex and end vertex shall be within the union of the domains of the vertices of the parent edge and the domain of the parent edge.
8.20.3.16.2 Entity inheritance
8.20.3.16.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcRepresentationItem (2) | |||
| 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. The inverse attribute LayerAssignments has been added. 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. The inverse attribute StyledByItem has been added. |
|
| IfcEdge (2) | |||
| 1 | EdgeStart | IfcVertex |
Start point (vertex) of the edge. |
| 2 | EdgeEnd | IfcVertex |
End point (vertex) of the edge. The same vertex can be used for both EdgeStart and EdgeEnd. |
| Click to show 4 hidden inherited attributes Click to hide 4 inherited attributes | |||
| IfcSubedge (1) | |||
| 3 | ParentEdge | IfcEdge |
The Edge, or Subedge, which contains the Subedge. |
8.20.3.16.4 Formal representation
ENTITY IfcSubedge
SUBTYPE OF (IfcEdge);
ParentEdge : IfcEdge;
END_ENTITY;