IfcPreferredSurfaceCurveRepresentation

BACnet MVD

#### IfcPreferredSurfaceCurveRepresentation

Natural language names

Change log

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

`

References: IfcSurfaceCurve

Link to this page