Dimension Count | |

Dimensionalité |

The IfcDimensionCount defins the dimensionality of the coordinate space. It is restricted to have the dimensionality of either 1, 2, or 3 for the purpose of this specification.

NOTE The shape representations assigned to a geometric representation context may include geometric representation items of lower dimensionality, particularly when defining the boundary of planar surfaces as 2D cross sections for the purpose of 3D swept areas.

NOTE Definition according to ISO/CD 10303-42:1992

A dimension count is a positive integer used to define the coordinate space dimensionality.

NOTE Type adapted fromdimension_countdefined in ISO 10303-42.

HISTORY New Type in IFC1.5

Rule | Description |
---|---|

WR1 | The dimension count should be an integer between 1 and 3 NOTE: This is a further constraint by IFC, the upper limit does not exist in STEP. |

` <xs:simpleType name="IfcDimensionCount">`

<xs:restriction base="xs:long"/>

</xs:simpleType>

```
TYPE IfcDimensionCount = INTEGER;
```

WHERE

WR1 : { 0 < SELF <= 3 }

END_TYPE;

References: IfcBooleanResult IfcBoundingBox IfcCartesianPointList IfcCsgPrimitive3D IfcFaceBasedSurfaceModel IfcGeometricSet IfcHalfSpaceSolid IfcSectionedSpine IfcShellBasedSurfaceModel IfcSolidModel IfcTessellatedFaceSet IfcCartesianPoint IfcCartesianTransformationOperator IfcCompositeCurveSegment IfcCurve IfcDirection IfcPlacement IfcPointOnCurve IfcPointOnSurface IfcSurface IfcVector IfcGeometricRepresentationContext IfcGeometricRepresentationSubContext