8.2.2.4 IfcMetricValueSelect
IfcMetricValueSelect is a select type that enables selection of the data type for the value component of an IfcMetric.
Types are used as follows:
- IfcValue: A constant value using project default units.
- IfcMeasureWithUnit: A constant value using specified units.
- IfcAppliedValue: A value calculated from a formula.
- IfcTable: A value retrieved from a table.
- IfcTimeSeries: A value that varies over time.
- IfcReference: A value referenced on an object attribute.
HISTORY New type in IFC2.0.
IFC4 CHANGE IfcValue added, which includes removed IfcDateTime and IfcText; IfcReference added.
XSD Specification:
<xs:group name="IfcMetricValueSelect">
<xs:choice>
<xs:element ref="ifc:IfcAreaMeasure-wrapper"/>
<xs:element ref="ifc:IfcDate-wrapper"/>
<xs:element ref="ifc:IfcDateTime-wrapper"/>
<xs:element ref="ifc:IfcDuration-wrapper"/>
<xs:element ref="ifc:IfcIdentifier-wrapper"/>
<xs:element ref="ifc:IfcInteger-wrapper"/>
<xs:element ref="ifc:IfcLabel-wrapper"/>
<xs:element ref="ifc:IfcLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcMeasureWithUnit"/>
<xs:element ref="ifc:IfcMonetaryMeasure-wrapper"/>
<xs:element ref="ifc:IfcPositiveLengthMeasure-wrapper"/>
<xs:element ref="ifc:IfcReal-wrapper"/>
<xs:element ref="ifc:IfcReference"/>
<xs:element ref="ifc:IfcTable"/>
<xs:element ref="ifc:IfcText-wrapper"/>
<xs:element ref="ifc:IfcTime-wrapper"/>
<xs:element ref="ifc:IfcTimeStamp-wrapper"/>
</xs:choice>
</xs:group>
EXPRESS Specification:
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TYPE IfcMetricValueSelect = SELECT (
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