IfcConnectedFaceSet

Semantic definitions at the entity

Entity definition

NOTE Definition according to ISO/CD 10303-42:1992
A connected_face_set is a set of faces such that the domain of faces together with their bounding edges and vertices is connected.

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

HISTORY New entity in IFC1.0

Informal Propositions:

The union of the domains of the faces and their bounding loops shall be arcwise connected.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	CfsFaces	IfcFace	S[1:?]	The set of faces arcwise connected along common edges or vertices.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
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. 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
	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. IFC2x3 CHANGE The inverse attribute StyledByItem has been added.	X
IfcTopologicalRepresentationItem
IfcConnectedFaceSet
1	CfsFaces	IfcFace	S[1:?]	The set of faces arcwise connected along common edges or vertices.	X

Formal representations

XML Specification

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

 <xs:complexType name="IfcConnectedFaceSet">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="CfsFaces">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcFace" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcFace"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcConnectedFaceSet

 SUPERTYPE OF(ONEOF(IfcClosedShell, IfcOpenShell))

 SUBTYPE OF (IfcTopologicalRepresentationItem);

  CfsFaces : SET [1:?] OF IfcFace;

END_ENTITY;

 EXPRESS-G diagram

	Gruppe verbundender Flächen
	Connected Face Set
	Ensemble de faces connectées