IfcFaceBound

Semantic definitions at the entity

Entity definition

NOTE Definition according to ISO/CD 10303-42:1992
A face bound is a loop which is intended to be used for bounding a face.

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

HISTORY New entity in IFC1.0

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	Bound	IfcLoop		The loop which will be used as a face boundary.	X
2	Orientation	IfcBoolean		This indicated whether (TRUE) or not (FALSE) the loop has the same sense when used to bound the face as when first defined. If sense is FALSE the senses of all its component oriented edges are implicitly reversed when used in the face.	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
IfcFaceBound
1	Bound	IfcLoop		The loop which will be used as a face boundary.	X
2	Orientation	IfcBoolean		This indicated whether (TRUE) or not (FALSE) the loop has the same sense when used to bound the face as when first defined. If sense is FALSE the senses of all its component oriented edges are implicitly reversed when used in the face.	X

Formal representations

XML Specification

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

 <xs:complexType name="IfcFaceBound">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="Bound" type="ifc:IfcLoop" nillable="true"/>

    </xs:sequence>

    <xs:attribute name="Orientation" type="ifc:IfcBoolean" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcFaceBound

 SUPERTYPE OF(IfcFaceOuterBound)

 SUBTYPE OF (IfcTopologicalRepresentationItem);

  Bound : IfcLoop;

  Orientation : IfcBoolean;

END_ENTITY;

 EXPRESS-G diagram

	Flächenbegrenzung - Topologie
	Face Bound
	Contour de face

Item	Change	Description
IFC4 Addendum 1
IfcFaceBound
Orientation	MODIFIED	Type changed from BOOLEAN to IfcBoolean.