IfcSubedge

Definition from ISO/DIS 10303-42:1999(E): 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.

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.

NOTE: Corresponding STEP entity: subedge. Please refer to ISO/DIS 10303-42:1999(E), p. 194 for the final definition of the formal standard.

HISTORY: New entity in Release IFC 2x Edition 2.

EXPRESS specification:

ENTITY IfcSubedge

SUBTYPE OF (

IfcEdge);

ParentEdge

IfcEdge;

END_ENTITY;

Attribute definitions:

ParentEdge

The Edge, or Subedge, which contains the Subedge.

Inheritance graph

ENTITY IfcSubedge;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;

ENTITY IfcTopologicalRepresentationItem;

ENTITY IfcEdge;

EdgeStart

IfcVertex;

EdgeEnd

IfcVertex;

ENTITY IfcSubedge;

ParentEdge

IfcEdge;

END_ENTITY;