IfcSubedge

Natural language names
Teilkante - Topologie
Subedge
Sous arête
Semantic definitions at the entity
Entity definition

NOTE  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.

NOTE  Entity adapted from subedge defined in ISO 10303-42.

HISTORY  New entity in IFC2x2.

Informal Propositions:

  1. 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.
  2. 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.
Attribute definitions
#AttributeTypeCardinalityDescription G
3ParentEdgeIfcEdge The Edge, or Subedge, which contains the Subedge. X
Inherited definitions from supertypes
Entity inheritance IfcEdge IfcTopologicalRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@AssignedItems
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.
X
StyledByItemIfcStyledItem
@Item
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.
X
IfcTopologicalRepresentationItem
IfcEdge
1EdgeStartIfcVertex Start point (vertex) of the edge. X
2EdgeEndIfcVertex End point (vertex) of the edge. The same vertex can be used for both EdgeStart and EdgeEnd. X
IfcSubedge
3ParentEdgeIfcEdge The Edge, or Subedge, which contains the Subedge. X
Formal representations
XML Specification
 <xs:element name="IfcSubedge" type="ifc:IfcSubedge" substitutionGroup="ifc:IfcEdge" nillable="true"/>
 <xs:complexType name="IfcSubedge">
  <xs:complexContent>
   <xs:extension base="ifc:IfcEdge">
    <xs:sequence>
     <xs:element name="ParentEdge" type="ifc:IfcEdge" nillable="true"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcSubedge
 SUBTYPE OF (IfcEdge);
  ParentEdge : IfcEdge;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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