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
# | Attribute | Type | Cardinality | Description | A |
---|---|---|---|---|---|
4 | CountValue | IfcCountMeasure | [1:1] | Count measure value of this quantity. | X |
Rule | Description |
---|---|
WR21 | The value of the count shall be greater than or equal to zero. |
# | Attribute | Type | Cardinality | Description | A |
---|---|---|---|---|---|
IfcPhysicalQuantity | |||||
1 | Name | IfcLabel | [1:1] | Name of the element quantity or measure. The name attribute has to be made recognizable by further agreements. | X |
2 | Description | - | This attribute is out of scope for this model view definition and shall not be set. | ||
IfcPhysicalSimpleQuantity | |||||
3 | Unit | - | This attribute is out of scope for this model view definition and shall not be set. | ||
IfcQuantityCount | |||||
4 | CountValue | IfcCountMeasure | [1:1] | Count measure value of this quantity. | X |
<xs:element name="IfcQuantityCount" type="ifc:IfcQuantityCount" substitutionGroup="ifc:IfcPhysicalSimpleQuantity" nillable="true"/>
<xs:complexType name="IfcQuantityCount">
<xs:complexContent>
<xs:extension base="ifc:IfcPhysicalSimpleQuantity">
<xs:attribute name="CountValue" type="ifc:IfcCountMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcQuantityCount
SUBTYPE OF (IfcPhysicalSimpleQuantity);
CountValue : IfcCountMeasure;
WHERE
WR21 : CountValue >= 0.;
END_ENTITY;