IfcUnit

Semantic definitions at the type

Type definition

NOTE Definition according to ISO/CD 10303-41:1992
A unit is a physical quantity, with a value of one, which is used as a standard in terms of which other quantities are expressed.

NOTE Select item IfcMonetaryUnit is an addition to ISO 10303-41.

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

SELECT

IfcNamedUnit: A unit which is identified by a name.
IfcDerivedUnit: A unit which is derived from an expression of units.
IfcMonetaryUnit: A unit for defining currencies.

HISTORY New type in IFC1.5.1.

Enumeration definition

Constant	Description
IfcDerivedUnit
IfcNamedUnit
IfcMonetaryUnit

Formal representations

XSD Specification

 <xs:group name="IfcUnit">

  <xs:choice>

   <xs:element ref="ifc:IfcDerivedUnit"/>

   <xs:element ref="ifc:IfcMonetaryUnit"/>

   <xs:element ref="ifc:IfcNamedUnit"/>

  </xs:choice>

 </xs:group>

EXPRESS Specification


TYPE IfcUnit = SELECT (

 IfcDerivedUnit, 
 IfcNamedUnit, 
 IfcMonetaryUnit);
END_TYPE;


 EXPRESS-G diagram

	Einheit
	Unit
	Unité