IfcSizeSelect

Definition from ISO/CD 10303-46:1992: The size select is a selection of a specific positive length measure.

Definition from ISO: The size (or width) measure value is given in the global drawing length units.

> NOTE global units are defined at the single IfcProject instance, given by UnitsInContext:IfcUnitAssignment, the same units are used for the geometric representation items and for the style definitions.

> NOTE Corresponding STEP name: size_select. Please refer to ISO/IS 10303-46:1994 for the final definition of the formal standard.

> HISTORY New type in Release IFC2x Edition 2.
> IFC2x Edition 3 CHANGE The SELECT item IfcMeasureWithUnit has been removed from the IfcSizeSelect, the IfcRatioMeasure and IfcDescriptiveMeasure has been added.

EXPRESS specification:

TYPE IfcSizeSelect = SELECT
( | IfcRatioMeasure, IfcLengthMeasure, IfcDescriptiveMeasure, IfcPositiveLengthMeasure, IfcNormalisedRatioMeasure, IfcPositiveRatioMeasure);
END_TYPE;