IFC 4.3.1.0 (IFC4X3_ADD1)

8.11.3.9 IfcNamedUnit

ABSTRACT This definition may not be instantiated

8.11.3.9.1 Semantic definition

8.11.3.9.2 Entity inheritance

8.11.3.9.3 Attributes

# Attribute Type Description
IfcNamedUnit (2)
1 Dimensions IfcDimensionalExponents

The dimensional exponents of the SI base units by which the named unit is defined.

2 UnitType IfcUnitEnum

The type of the unit.

Table 8.11.3.9.A

8.11.3.9.4 Formal propositions

Name Description
WR1

Correct dimensions of the unit are established through the function IfcCorrectDimensions.

IfcCorrectDimensions (SELF.UnitType, SELF.Dimensions)
Table 8.11.3.9.B

8.11.3.9.5 Formal representation

ENTITY IfcNamedUnit
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcContextDependentUnit
	,IfcConversionBasedUnit
	,IfcSIUnit));
	Dimensions : IfcDimensionalExponents;
	UnitType : IfcUnitEnum;
 WHERE
	WR1 : IfcCorrectDimensions (SELF.UnitType, SELF.Dimensions);
END_ENTITY;

8.11.3.9.6 References