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IfcConversionBasedUnit

Definition from ISO/CD 10303-41:1992: A conversion based unit is a unit that is defined based on a measure with unit.

NOTE: An inch is a converted unit. It is from the Imperial system, its name is "inch" and it can be related to the si unit, millimetre, through a measure with unit whose value is 25.4 millimetre. A foot is also a converted unit. It is from the Imperial system, its name is "foot" and it can be related to an si unit, millimetre, either directly or through the unit called "inch".
NOTE Corresponding STEP name: conversion_based_unit, please refer to ISO/IS 10303-41:1994 for the final definition of the formal standard.
HISTORY New entity in IFC Release 1.5.1.

EXPRESS specification:

ENTITY IfcConversionBasedUnit
SUBTYPE OF ( IfcNamedUnit);
Name  :  IfcLabel;
ConversionFactor  :  IfcMeasureWithUnit;
END_ENTITY;

Attribute definitions:

Name  :  The word, or group of words, by which the conversion based unit is referred to.
ConversionFactor  :  The physical quantity from which the converted unit is derived.

Inheritance graph

ENTITY IfcConversionBasedUnit;
ENTITY IfcNamedUnit;
Dimensions  :  IfcDimensionalExponents;
UnitType  :  IfcUnitEnum;
ENTITY IfcConversionBasedUnit;
Name  :  IfcLabel;
ConversionFactor  :  IfcMeasureWithUnit;
END_ENTITY;