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IfcQuantityVolume

Definition from IAI: A physical quantity that defines a derived volume 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: A thick brick wall may be measured according to its volume. The actual size of the volume depends on the method of measurement used.

HISTORY New entity in IFC Release 2.x
NOTE: It replaces the calcXxx attributes used in previous IFC Releases
ISSUE See issue and change log for changes made in IFC Release 2.x

EXPRESS specification:

ENTITY IfcQuantityVolume
SUBTYPE OF ( IfcPhysicalQuantity);
VolumeValue  :  IfcVolumeMeasure;
WHERE
WR1  :  NOT(EXISTS(SELF\IfcPhysicalQuantity.Unit)) OR (SELF\IfcPhysicalQuantity.Unit.UnitType = IfcUnitEnum.VOLUMEUNIT);
END_ENTITY;

Attribute definitions:

VolumeValue  :  Volume measure value of this quantity.

Formal Propositions:

WR1  :  If a unit is given, the unit type shall be volume unit.

References (1):

Name Type Referred through Express-G
IfcPhysicalQuantity Entity
Subtype
Diagram 1

Inheritance graph

ENTITY IfcQuantityVolume;
ENTITY IfcPhysicalQuantity;
Name  :  IfcLabel;
Description  :  OPTIONAL IfcText;
Unit  :  OPTIONAL IfcNamedUnit;
ENTITY IfcQuantityVolume;
VolumeValue  :  IfcVolumeMeasure;
END_ENTITY;