Definition from buildingSMART: The physical quantity,
IfcPhysicalQuantity, is an abstract entity that holds a complex or
simple quantity measure together with a semantic definition of the usage for
the single or several measure value.
The Name attribute defines the actual usage or kind of measure.
The interpretation of the name label has to be established within the actual
exchange context. In addition an informative text may be associated to each
quantity by the Description attribute.
HISTORY New entity in IFC Release 2.x.
It replaces the calcXxx attributes used in previous IFC
|| Name of the element quantity or measure. The name attribute has to be made recognizable by further agreements.
|| Further explanation that might be given to the quantity.
|| Reference to a physical complex quantity in which the physical quantity may be contained.