IfcPreferredSurfaceCurveRepresentation

Item	SPF	XML	Change	Description
IFC4 Addendum 2
IfcPreferredSurfaceCurveRepresentation			ADDED

Semantic definitions at the type

Type definition

The IfcPreferredSurfaceCurveRepresentation indicates the preferred form of an edge curve representation.

NOTE Definition according to ISO/CD 10303-42:1992
The preferred surface curve representation type is used to indicate the preferred form of representation for a surface curve, which is either a curve in geometric space or in the parametric space of the underlying surfaces.

NOTE Type adapted from preferred_surface_curve_representation defined in ISO 10303-42.

HISTORY New type in IFC4 Addendum 2.

Enumeration definition

Constant	Description
CURVE3D	The curve in three-dimensional space is preferred
PCURVE_S1	The first pcurve is preferred
PCURVE_S2	The second pcurve is preferred

Formal representations

XML Specification

 <xs:simpleType name="IfcPreferredSurfaceCurveRepresentation">

  <xs:restriction base="xs:string">

   <xs:enumeration value="curve3d"/>

   <xs:enumeration value="pcurve_s1"/>

   <xs:enumeration value="pcurve_s2"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcPreferredSurfaceCurveRepresentation = ENUMERATION OF (

 CURVE3D, 
 PCURVE_S1, 
 PCURVE_S2);
END_TYPE;


 EXPRESS-G diagram