IfcSurfaceOrFaceSurface

Natural language names
Surface Or Face Surface
Semantic definitions at the type
Type definition

IfcSurfaceOrFaceSurface provides the option to either select a geometric surface (IfcSurface and subtypes) within a geometric model, or a face with associated surface geometry and coordinates (IfcFaceSurface) within a topological model.

HISTORY  New select type in IFC2x3.

Select definition
TypeDescription
IfcSurface
IfcFaceSurface
IfcFaceBasedSurfaceModel
Formal representations
XML Specification
 <xs:group name="IfcSurfaceOrFaceSurface">
  <xs:choice>
   <xs:element ref="ifc:IfcFaceBasedSurfaceModel"/>
   <xs:element ref="ifc:IfcFaceSurface"/>
   <xs:element ref="ifc:IfcSurface"/>
  </xs:choice>
 </xs:group>
EXPRESS Specification
TYPE IfcSurfaceOrFaceSurface = SELECT (
 IfcSurface,
 IfcFaceSurface,
 IfcFaceBasedSurfaceModel);
END_TYPE;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcConnectionSurfaceGeometry

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