| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 4 | NumberValue | IfcNumericMeasure | 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 |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 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 |
| HasExternalReferences | IfcExternalReferenceRelationship @RelatedResourceObjects | S[0:?] | Reference to an external reference, e.g. library, classification, or document information, that is associated to the quantity.
IFC4 CHANGE New inverse attribute. | X | |
| PartOfComplex | IfcPhysicalComplexQuantity @HasQuantities | S[0:1] | Reference to a physical complex quantity in which the physical quantity may be contained. | X | |
| IfcPhysicalSimpleQuantity | |||||
| 3 | Unit | IfcNamedUnit | ? | Optional assignment of a unit. If no unit is given, then the global unit assignment, as established at the IfcProject, applies to the quantity measures. | X |
| IfcQuantityNumber | |||||
| 4 | NumberValue | IfcNumericMeasure | 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="IfcQuantityNumber" type="ifc:IfcQuantityNumber" substitutionGroup="ifc:IfcPhysicalSimpleQuantity" nillable="true"/>
<xs:complexType name="IfcQuantityNumber">
<xs:complexContent>
<xs:extension base="ifc:IfcPhysicalSimpleQuantity">
<xs:attribute name="NumberValue" type="ifc:IfcNumericMeasure" use="optional"/>
<xs:attribute name="Formula" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcQuantityNumber
SUBTYPE OF (IfcPhysicalSimpleQuantity);
NumberValue : IfcNumericMeasure;
Formula : OPTIONAL IfcLabel;
END_ENTITY;
EXPRESS-G diagram
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