IfcQuantityCount

Definition from IAI: An physical quantity, IfcQuantityCount, that defines a derived count 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 radiator may be measured according to its number of coils. The actual counting method depends on the method of measurement used.

HISTORY New entity in IFC Release 2.x . It replaces the calcXxx attributes used in previous IFC Releases

EXPRESS specification:

ENTITY IfcQuantityCount

SUBTYPE OF (

IfcPhysicalSimpleQuantity);

CountValue

IfcCountMeasure;

WHERE

WR21

CountValue >= 0.;

END_ENTITY;

Attribute definitions:

CountValue

Count measure value of this quantity.

Formal Propositions:

WR21

The value of the count shall be greater than or equal to zero.

Inheritance graph

ENTITY IfcQuantityCount;

ENTITY IfcPhysicalQuantity;

Name

IfcLabel;

Description

OPTIONAL IfcText;

INVERSE

PartOfComplex

SET [0:1] OF IfcPhysicalComplexQuantity FOR HasQuantities;

ENTITY IfcPhysicalSimpleQuantity;

Unit

OPTIONAL IfcNamedUnit;

ENTITY IfcQuantityCount;

CountValue

IfcCountMeasure;

END_ENTITY;