IfcValue

Semantic definitions at the type

Type definition

A select type for selecting between more specialised select types IfcSimpleValue, IfcMeasureValue and IfcDerivedMeasureValue.

SELECT

IfcSimpleValue A select type for basic defined types of simple data type.
IfcMeasureValue A select type for basic measure types of ISO/CD 10303-41.
IfcDerivedMeasureValue A select type for derived measure types.

HISTORY New type in IFC Release 2x.

Enumeration definition

Constant	Description
IfcMeasureValue
IfcSimpleValue
IfcDerivedMeasureValue

Formal representations

XSD Specification

 <xs:group name="IfcValue">

  <xs:choice>

   <xs:element ref="ifc:IfcBoolean-wrapper"/>

   <xs:element ref="ifc:IfcCountMeasure-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: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:element ref="ifc:IfcReal-wrapper"/>

   <xs:element ref="ifc:IfcText-wrapper"/>

   <xs:element ref="ifc:IfcTimeStamp-wrapper"/>

  </xs:choice>

 </xs:group>

EXPRESS Specification


TYPE IfcValue = SELECT (

 IfcMeasureValue, 
 IfcSimpleValue);
END_TYPE;


 EXPRESS-G diagram