#### 8.2.2.1 IfcAppliedValueSelect

IfcAppliedValueSelect defines a value to be calculated within a formula.

Types are used as follows:

- IfcValue: A constant value using project default units.
- IfcMeasureWithUnit: A constant value using specified units.
- IfcReference: A value referenced on an object attribute.

For cost values, the following guidance applies:

- IfcMeasureWithUnit allows the specification of both the actual figure for the value together with the currency in which the value is represented.
- Selecting IfcMonetaryMeasure allows the specification only of the value, the currency being as set by the global context.
- Selecting IfcRatioMeasure assumes that the amount is a percentage or other REAL number. Note that if the amount is normally specified as -20%, then this figure will need to be converted to a multiplier of 0.8

> HISTORY New select type in IFC2x2.

XSD Specification:

<xs:group name="IfcAppliedValueSelect">
<xs:choice>
<xs:element ref="ifc:IfcAreaMeasure-wrapper"/>
<xs:element ref="ifc:IfcBoolean-wrapper"/>
<xs:element ref="ifc:IfcCompoundPlaneAngleMeasure-wrapper"/>
<xs:element ref="ifc:IfcCountMeasure-wrapper"/>
<xs:element ref="ifc:IfcDate-wrapper"/>
<xs:element ref="ifc:IfcDateTime-wrapper"/>
<xs:element ref="ifc:IfcDuration-wrapper"/>
<xs:element ref="ifc:IfcElectricCurrentMeasure-wrapper"/>
<xs:element ref="ifc:IfcElectricResistanceMeasure-wrapper"/>
<xs:element ref="ifc:IfcElectricVoltageMeasure-wrapper"/>
<xs:element ref="ifc:IfcEnergyMeasure-wrapper"/>
<xs:element ref="ifc:IfcFrequencyMeasure-wrapper"/>
<xs:element ref="ifc:IfcIdentifier-wrapper"/>
<xs:element ref="ifc:IfcIlluminanceMeasure-wrapper"/>
<xs:element ref="ifc:IfcInteger-wrapper"/>
<xs:element ref="ifc:IfcLabel-wrapper"/>
<xs:element ref="ifc:IfcLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcLogical-wrapper"/>
<xs:element ref="ifc:IfcMassMeasure-wrapper"/>
<xs:element ref="ifc:IfcMeasureWithUnit"/>
<xs:element ref="ifc:IfcMonetaryMeasure-wrapper"/>
<xs:element ref="ifc:IfcNormalisedRatioMeasure-wrapper"/>
<xs:element ref="ifc:IfcPlanarForceMeasure-wrapper"/>
<xs:element ref="ifc:IfcPlaneAngleMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositiveLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositiveRatioMeasure-wrapper"/>
<xs:element ref="ifc:IfcPowerMeasure-wrapper"/>
<xs:element ref="ifc:IfcReal-wrapper"/>
<xs:element ref="ifc:IfcText-wrapper"/>
<xs:element ref="ifc:IfcThermalConductivityMeasure-wrapper"/>
<xs:element ref="ifc:IfcThermodynamicTemperatureMeasure-wrapper"/>
<xs:element ref="ifc:IfcTime-wrapper"/>
<xs:element ref="ifc:IfcTimeMeasure-wrapper"/>
<xs:element ref="ifc:IfcTimeStamp-wrapper"/>
<xs:element ref="ifc:IfcVolumeMeasure-wrapper"/>
</xs:choice>
</xs:group>

EXPRESS Specification:

TYPE IfcAppliedValueSelect = SELECT (
| IfcMeasureWithUnit, IfcValue);
END_TYPE;

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