Natural language names
Geometrische Gruppe - Punkte und Kurven
Geometric Curve Set
Semantic definitions at the entity
Entity definition

The IfcGeometricCurveSet is used for the exchange of shape representation consisting of an collection of (2D or 3D) points and curves only.

NOTE  Definition according to ISO/CD 10303-42:1992
A geometric curve set is a collection of two or three dimensional points and curves.
NOTE  Entity adapted from geometric_curve_set defined in ISO 10303-42.
HISTORY  New entity in IFC2x2.
Formal Propositions
NoSurfacesNo surface shall be included in this geometric set.
Inherited definitions from supertypes
Entity inheritance IfcGeometricSet IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
S[0:1]Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.
IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added.
IFC4 CHANGE  The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
S[0:1]Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.
1ElementsIfcGeometricSetSelectS[1:?] The geometric elements which make up the geometric set, these may be points, curves or surfaces; but are required to be of the same coordinate space dimensionality.X
IfcDimensionCountThe space dimensionality of this class, it is identical to the first element in the set. A where rule ensures that all elements have the same dimensionality. X
Formal representations
XML Specification
 <xs:element name="IfcGeometricCurveSet" type="ifc:IfcGeometricCurveSet" substitutionGroup="ifc:IfcGeometricSet" nillable="true"/>
 <xs:complexType name="IfcGeometricCurveSet">
   <xs:extension base="ifc:IfcGeometricSet"/>
EXPRESS Specification
ENTITY IfcGeometricCurveSet
 SUBTYPE OF (IfcGeometricSet);
  NoSurfaces : SIZEOF(QUERY(Temp <* SELF\IfcGeometricSet.Elements |
'IFCGEOMETRYRESOURCE.IfcStrippedOptional' IN TYPEOF(Temp))) = 0;

Link to EXPRESS-G diagram EXPRESS-G diagram

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