IfcVertex

Natural language names

	Vertex - Topologie
	Vertex
	Sommet

Semantic definitions at the entity

Entity definition

NOTE Definition according to ISO/CD 10303-42:1992
A vertex is the topological construct corresponding to a point. It has dimensionality 0 and extent 0. The domain of a vertex, if present, is a point in m dimensional real space R^M; this is represented by the vertex point subtype.

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

HISTORY New entity in IFC2.0

Informal Propositions:

The vertex has dimensionality 0. This is a fundamental property of the vertex.
The extent of a vertex is defined to be zero.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRepresentationItem
	LayerAssignment	IfcPresentationLayerAssignment @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.	X
	StyledByItem	IfcStyledItem @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.	X
IfcTopologicalRepresentationItem
IfcVertex

Formal representations

XSD Specification

 <xs:element name="IfcVertex" type="ifc:IfcVertex" substitutionGroup="ifc:IfcTopologicalRepresentationItem" nillable="true"/>

 <xs:complexType name="IfcVertex">

  <xs:complexContent>

   <xs:extension base="ifc:IfcTopologicalRepresentationItem"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcVertex

 SUPERTYPE OF(IfcVertexPoint)

 SUBTYPE OF (IfcTopologicalRepresentationItem);

END_ENTITY;

 EXPRESS-G diagram

Link to this page