NOTE Definition according to ISO/CD 10303-41:1992
A unit is a physical quantity, with a value of one, which is used as a standard in terms of which other quantities are expressed.
NOTE Select item IfcMonetaryUnit is an addition to ISO 10303-41.
NOTE Corresponding ISO 10303 name: unit, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
HISTORY New type in IFC1.5.1.