Defined in File Ifc4x1.h
IfcQuantityArea: public Ifc4x1::IfcPhysicalSimpleQuantity¶
IfcQuantityArea is a physical quantity that defines a derived area measure to provide an element’s physical property. It is normally derived from the physical properties of the element under the specific measure rules given by a method of measurement.
EXAMPLE An opening may have an opening area used to deduct it from the wall surface area. The actual size of the area depends on the method of measurement used.
HISTORY New entity in IFC2x. It replaces the calcXxx attributes used in previous IFC Releases.
Area measure value of this quantity.
Whether the optional attribute Formula is defined for this IfcQuantityArea.
A formula by which the quantity has been calculated. It can be assigned in addition to the actual value of the quantity. Formulas could be mathematic calculations (like width x height), database links, or a combination. The formula is for informational purposes only.
IFC2x4 CHANGE Attribute added to the end of the attribute list.