Definition from ISO/CD 10303-41:1992: A ratio measure is the value of the relation between two physical quantities that are of the same kind.
NOTE: Input given in percent is to be divided by 100% when stored as an IfcRatioMeasure. E.g. 25% becomes 0.25.
NOTE Corresponding STEP name: ratio_measure, 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.