 | Mengenangabe - Zählung |
 | Quantity Count |
 | Quantité de comptage |
| Item | SPF | XML | Change | Description | 4.0.0.0 |
|---|---|---|---|---|
| IfcQuantityCount | ||||
| Formula | ADDED |
IfcQuantityCount is a physical quantity 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 IFC2x. It replaces the calcXxx attributes used in previous IFC Releases.
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| 4 | CountValue | IfcCountMeasure | Count measure value of this quantity. | X | |
| 5 | Formula | IfcLabel | ? |
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.
IFC4 CHANGE Attribute added to the end of the attribute list. | X |
| Rule | Description |
|---|---|
| WR21 | The value of the count shall be greater than or equal to zero. |
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| IfcPhysicalQuantity | |||||
| 1 | Name | IfcLabel | Name of the element quantity or measure. The name attribute has to be made recognizable by further agreements. | X | |
| 2 | Description | IfcText | ? | Further explanation that might be given to the quantity. | X |
| PartOfComplex | IfcPhysicalComplexQuantity @HasQuantities | S[0:1] | Reference to a physical complex quantity in which the physical quantity may be contained. | ||
| IfcPhysicalSimpleQuantity | |||||
| 3 | Unit | - | This attribute is out of scope for this model view definition and shall not be set. | ||
| IfcQuantityCount | |||||
| 4 | CountValue | IfcCountMeasure | Count measure value of this quantity. | X | |
| 5 | Formula | IfcLabel | ? |
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.
IFC4 CHANGE Attribute added to the end of the attribute list. | 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:attribute name="Formula" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcQuantityCount
SUBTYPE OF (IfcPhysicalSimpleQuantity);
CountValue : IfcCountMeasure;
Formula : OPTIONAL IfcLabel;
WHERE
WR21 : CountValue >= 0.;
END_ENTITY;
EXPRESS-G diagram
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