8.5.3.5 IfcMeasureWithUnit

Mesure avec unité
Maß mit Einheit
NOTE  Definition according to ISO/CD 10303-41:1992
A measure with unit is the specification of a physical quantity as defined in ISO 31 (clause 2).

IfcMeasureWithUnit has two usages:
1. For representing measure value together with its unit on the entity type attribute level; thus overriding the IFC model global unit assignments.
2. For conversion based unit to give the conversion rate and its base.

NOTE  Corresponding ISO 10303 name: measure_with_unit, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
HISTORY  New entity in IFC1.5.1.

XSD Specification:

 <xs:element name="IfcMeasureWithUnit" type="ifc:IfcMeasureWithUnit" substitutionGroup="ifc:Entity" nillable="true"/>
 <xs:complexType name="IfcMeasureWithUnit">
  <xs:complexContent>
   <xs:extension base="ifc:Entity">
    <xs:sequence>
     <xs:element name="ValueComponent">
      <xs:complexType>
       <xs:group ref="ifc:IfcValue"/>
      </xs:complexType>
     </xs:element>
     <xs:element name="UnitComponent">
      <xs:complexType>
       <xs:group ref="ifc:IfcUnit"/>
      </xs:complexType>
     </xs:element>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcMeasureWithUnit;
ValueComponent : IfcValue;
UnitComponent : IfcUnit;
END_ENTITY;

Attribute Definitions:

ValueComponent : The value of the physical quantity when expressed in the specified units.
UnitComponent : The unit in which the physical quantity is expressed.

Inheritance Graph:

ENTITY IfcMeasureWithUnit
ENTITY IfcMeasureWithUnit
ValueComponent : IfcValue;
UnitComponent : IfcUnit;
END_ENTITY;

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