#### IfcMeasureValue

Natural language names

##### Semantic definitions at the type

Type definition

Definition from ISO/CD 10303-41:1992: A measure value is a value as defined in ISO 31-0 (clause 2).

> NOTE IfcMeasureValue is a select data type for most basic measure types coming from ISO/CD 10303:41.

> NOTE Corresponding STEP name: measure_value, please refer to ISO/IS 10303-41:1994 for the final definition of the formal standard.

SELECT

- IfcAmountOfSubstanceMeasure
- IfcAreaMeasure
- IfcContextDependentMeasure
- IfcCountMeasure
- IfcDescriptiveMeasure
- IfcElectricCurrentMeasure
- IfcLengthMeasure
- IfcLuminousIntensityMeasure
- IfcMassMeasure
- IfcNormalisedRatioMeasure
- IfcNumericMeasure
- IfcParameterValue
- IfcPlaneAngleMeasure
- IfcPositiveLengthMeasure
- IfcPositivePlaneAngleMeasure
- IfcPositiveRatioMeasure
- IfcRatioMeasure
- IfcSolidAngleMeasure
- IfcThermodynamicTemperatureMeasure
- IfcTimeMeasure
- IfcVolumeMeasure
- IfcComplexNumber

> HISTORY New type in IFC Release 1.5.1.

Enumeration definition

Constant | Description
--- | ---
IfcVolumeMeasure |
IfcTimeMeasure |
IfcThermodynamicTemperatureMeasure |
IfcSolidAngleMeasure |
IfcPositiveRatioMeasure |
IfcRatioMeasure |
IfcPositivePlaneAngleMeasure |
IfcPlaneAngleMeasure |
IfcParameterValue |
IfcNumericMeasure |
IfcMassMeasure |
IfcPositiveLengthMeasure |
IfcLengthMeasure |
IfcElectricCurrentMeasure |
IfcDescriptiveMeasure |
IfcCountMeasure |
IfcContextDependentMeasure |
IfcAreaMeasure |
IfcAmountOfSubstanceMeasure |
IfcLuminousIntensityMeasure |
IfcNormalisedRatioMeasure |
IfcComplexNumber |

##### Formal representations

XSD Specification
`<xs:group name="IfcMeasureValue">
<xs:choice>
<xs:element ref="ifc:IfcCountMeasure-wrapper"/>
<xs:element ref="ifc:IfcLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcParameterValue-wrapper"/>
<xs:element ref="ifc:IfcPlaneAngleMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositiveLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositivePlaneAngleMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositiveRatioMeasure-wrapper"/>
<xs:element ref="ifc:IfcRatioMeasure-wrapper"/>
</xs:choice>
</xs:group>
`
EXPRESS Specification
`TYPE IfcMeasureValue = SELECT (
IfcPositiveRatioMeasure,
IfcRatioMeasure,
IfcPositivePlaneAngleMeasure,
IfcPlaneAngleMeasure,
IfcParameterValue,
IfcPositiveLengthMeasure,
IfcLengthMeasure,
IfcCountMeasure);
END_TYPE;

EXPRESS-G diagram

`

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