additions | where_rules | NoSurfaces |

deletions | where_rules | WR1 |

additions | where_rules | NoSurfaces |

deletions | where_rules | NoSurfaces |

additions | where_rules | NoSurfaces |

deletions | where_rules | NoSurfaces |

additions | where_rules | NoSurfaces |

deletions | where_rules | NoSurfaces |

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_setdefined in ISO 10303-42.HISTORY New entity in IFC2x2.

No surface shall be included in this geometric set.

# | Attribute | Type | Description |
---|---|---|---|

IfcRepresentationItem | |||

LayerAssignment | SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems | 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. | |

StyledByItem | SET [0:1] OF IfcStyledItem FOR Item | 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. | |

IfcGeometricRepresentationItem | |||

IfcGeometricSet | |||

1 | Elements | SET [1:?] OF IfcGeometricSetSelect | 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. |

Dim | INVALID | The 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. |

ENTITY IfcGeometricCurveSet SUBTYPE OF (IfcGeometricSet); WHERE NoSurfaces : SIZEOF(QUERY(Temp <* SELF\IfcGeometricSet.Elements | 'IFC4X3_DEV_a1492713.IFCSURFACE' IN TYPEOF(Temp))) = 0; END_ENTITY;