Defined in File Ifc2x3.h
IfcAmountOfSubstanceMeasure: public IfcUtil::IfcBaseType¶
Definition from ISO/CD 10303-41:1992: An amount of substance measure is the value for the quantity of a substance when compared with the number of atoms in 0.012kilogram of carbon 12.
Usually measure in mole (mol). Type: REAL
NOTE Corresponding ISO 10303 name: amount_of_substance_measure, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
HISTORY New type in IFC Release 1.5.1.
operator double() const¶