IfcFaceBound

Natural language names
Flächenbegrenzung - Topologie
Face Bound
Contour de face
Change log
ItemSPFXMLChangeDescription
IFC4 Addendum 1 4.0.1.0
    IfcFaceBound
      OrientationMODIFIEDType changed from BOOLEAN to IfcBoolean.
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
#AttributeTypeCardinalityDescription G
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
Inherited definitions from supertypes
Entity inheritance IfcFaceOuterBound IfcTopologicalRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@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
StyledByItemIfcStyledItem
@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
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="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;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcFace

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