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IfcDiameterDimension

Definition from buildingSMART: The diameter dimension is a draughting callout that presents the diameter extent of a conic element. It consists of a dimension curve and may have projection curves (but is often defined without projection curves).

NOTE: The dimension text is handled through the IfcStructuredDimensionCallout and associated via the IfcDimensionCalloutRelationship.

Illustration:

diameter dimension

NOTE: The IfcDiameterDimension is an entity that had been adopted from ISO 10303, Industrial automation systems and integration—Product data representation and exchange, Part 202: Application protocol: Associative draughting.

NOTE Corresponding STEP name: diameter_dimension. Please refer to ISO/IS 10303-202:1994 page 487 for the final definition of the formal standard.

HISTORY New entity in Release IFC2x 2nd Edition.

EXPRESS specification:

ENTITY IfcDiameterDimension
SUBTYPE OF ( IfcDimensionCurveDirectedCallout);
END_ENTITY;

Inheritance graph

ENTITY IfcDiameterDimension;
ENTITY IfcRepresentationItem;
INVERSE
LayerAssignments  :  SET OF IfcPresentationLayerAssignment FOR AssignedItems;
StyledByItem  :  SET [0:1] OF IfcStyledItem FOR Item;
ENTITY IfcGeometricRepresentationItem;
ENTITY IfcDraughtingCallout;
Contents  :  SET [1:?] OF IfcDraughtingCalloutElement;
INVERSE
IsRelatedFromCallout  :  SET OF IfcDraughtingCalloutRelationship FOR RelatedDraughtingCallout;
IsRelatedToCallout  :  SET OF IfcDraughtingCalloutRelationship FOR RelatingDraughtingCallout;
ENTITY IfcDimensionCurveDirectedCallout;
ENTITY IfcDiameterDimension;
END_ENTITY;