IfcFaceBound

Semantic definitions at the entity

Entity definition

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

NOTE Corresponding STEP entity: face_bound. Please refer to ISO/IS 10303-42:1994, p. 139 for the final definition of the formal standard.

HISTORY New class in IFC Release 1.0

Attribute definitions

#	Attribute	Type	Cardinality	Description	A
1	Bound	IfcLoop	[1:1]	The loop which will be used as a face boundary.	X
2	Orientation	BOOLEAN	[1:1]	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	A
IfcRepresentationItem
IfcTopologicalRepresentationItem
IfcFaceBound
1	Bound	IfcLoop	[1:1]	The loop which will be used as a face boundary.	X
2	Orientation	BOOLEAN	[1:1]	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

XSD 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="xs:boolean" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcFaceBound

 SUPERTYPE OF(IfcFaceOuterBound)

 SUBTYPE OF (IfcTopologicalRepresentationItem);

  Bound : IfcLoop;

  Orientation : BOOLEAN;

END_ENTITY;

 EXPRESS-G diagram