NOTE Definition according to ISO/CD 10303-41:1992
A context dependent unit is a unit which is not related to the SI system.
NOTE The number of parts in an assembly is a physical quantity measured in units that may be called "parts" but which cannot be related to an SI unit.
NOTE Corresponding ISO 10303 name: context_dependent_unit, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
HISTORY New entity in IFC1.5.1.
|1||Dimensions||IfcDimensionalExponents||The dimensional exponents of the SI base units by which the named unit is defined.|
|2||UnitType||IfcUnitEnum||The type of the unit.|
|3||Name||IfcLabel||The word, or group of words, by which the context dependent unit is referred to.|
|HasExternalReference||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||Reference to external information, e.g. library, classification, or document information, which is associated with the context dependent unit.|
> IFC4 CHANGE New inverse attribute
ENTITY IfcContextDependentUnit SUBTYPE OF (IfcNamedUnit); Name : IfcLabel; INVERSE HasExternalReference : SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects; END_ENTITY;