IfcMeasureWithUnit

Semantic definitions at the entity

Entity definition

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.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	ValueComponent	IfcValue	[1:1]	The value of the physical quantity when expressed in the specified units.	X
2	UnitComponent	IfcUnit	[1:1]	The unit in which the physical quantity is expressed.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcMeasureWithUnit
1	ValueComponent	IfcValue	[1:1]	The value of the physical quantity when expressed in the specified units.	X
2	UnitComponent	IfcUnit	[1:1]	The unit in which the physical quantity is expressed.	X

Formal representations

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;

 EXPRESS-G diagram

	Maß mit Einheit
	Measure With Unit
	Mesure avec unité