Natural language names
Äußere Flächenbegrenzung - Topologie
Face Outer Bound
Contour extérieur de face
Change log
      OrientationMODIFIEDType changed from BOOLEAN to IfcBoolean.
Semantic definitions at the entity
Entity definition

NOTE  Definition according to ISO/CD 10303-42:1992
A face outer bound is a special subtype of face bound which carries the additional semantics of defining an outer boundary on the face. No more than one boundary of a face shall be of this type.
NOTE  Entity adapted from face_outer_bound defined in ISO 10303-42.
HISTORY  New entity in IFC1.0
Inherited definitions from supertypes
Entity inheritance IfcFaceBound IfcTopologicalRepresentationItem IfcRepresentationItem
Attribute inheritance
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.
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.
1BoundIfcLoop The loop which will be used as a face boundary. X
2OrientationIfcBoolean 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="IfcFaceOuterBound" type="ifc:IfcFaceOuterBound" substitutionGroup="ifc:IfcFaceBound" nillable="true"/>
 <xs:complexType name="IfcFaceOuterBound">
   <xs:extension base="ifc:IfcFaceBound"/>
EXPRESS Specification
ENTITY IfcFaceOuterBound
 SUBTYPE OF (IfcFaceBound);

Link to EXPRESS-G diagram EXPRESS-G diagram

Link to this page  Link to this page