IfcMeasureWithUnit has two usages: 1. For representing measure value together with its unit on the entity type attribute level; thus overriding the IFC model global unit assignments. 2. For conversion based unit to give the conversion rate and its base.
The value of the physical quantity when expressed in the specified units.
The unit in which the physical quantity is expressed.
ENTITY IfcMeasureWithUnit; ValueComponent : IfcValue; UnitComponent : IfcUnit; END_ENTITY;