IfcSurfaceOrFaceSurface

BACnet MVD

#### 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

Type | Description
--- | ---
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;

EXPRESS-G diagram

`

References: IfcConnectionSurfaceGeometry

Link to this page