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IfcNamedUnit

Definition from ISO/CD 10303-41:1992: A named unit is a unit quantity associated with the word, or group of words, by which the unit is identified.

NOTE Corresponding STEP name: named_unit, please refer to ISO/IS 10303-41:1994 for the final definition of the formal standard.
HISTORY New type in IFC Release 1.5.1.

EXPRESS specification:

ENTITY IfcNamedUnit
ABSTRACT SUPERTYPE OF (ONEOF(IfcContextDependentUnit, IfcConversionBasedUnit, IfcSIUnit));
Dimensions  :  IfcDimensionalExponents;
UnitType  :  IfcUnitEnum;
WHERE
WR1  :  IfcCorrectDimensions (SELF.UnitType, SELF.Dimensions);
END_ENTITY;

Attribute definitions:

Dimensions  :  The dimensional exponents of the SI base units by which the named unit is defined.
UnitType  :  The type of the unit.

Formal Propositions:

WR1  :  Correct dimensions of the unit are established through the function IfcCorrectDimensions.

Inheritance graph

ENTITY IfcNamedUnit;
ENTITY IfcNamedUnit;
Dimensions  :  IfcDimensionalExponents;
UnitType  :  IfcUnitEnum;
END_ENTITY;