IfcSurfaceSide

Natural language names
Surface Side
Semantic definitions at the type
Type definition

IfcSurfaceSide is a denotion of whether negative, positive or both sides of a surface are being referenced.

NOTE  Type adapted from surface_side defined in ISO10303-46.

HISTORY  New enumeration type in IFC2.0

Enumeration definition
ConstantDescription
POSITIVEThe side of a surface which is in the same direction as the surface normal derived from the mathematical definition.
NEGATIVEThe side of a surface which is in the opposite direction than the surface normal derived from the mathematical definition.
BOTHBoth, positive and negative side.
Formal representations
XML Specification
 <xs:simpleType name="IfcSurfaceSide">
  <xs:restriction base="xs:string">
   <xs:enumeration value="positive"/>
   <xs:enumeration value="negative"/>
   <xs:enumeration value="both"/>
  </xs:restriction>
 </xs:simpleType>
EXPRESS Specification
TYPE IfcSurfaceSide = ENUMERATION OF (
 POSITIVE,
 NEGATIVE,
 BOTH);
END_TYPE;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcSurfaceStyle

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