IfcNamedUnit

IfcNamedUnit

实体定义
注：定义依据ISO/CD 10303-41:1992
命名单位是与单词或单词组相关联的单位数量，通过该单位来识别该单位。
注：对应的ISO 10303名称：named_unit，正式标准的最终定义请参考ISO/IS 10303-41。
IFC1.5.1中的新型。

 

Formal Propositions

Rule	Description
WR1	Correct dimensions of the unit are established through the function IfcCorrectDimensions.

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcNamedUnit
1	Dimensions	IfcDimensionalExponents	[1:1]	The dimensional exponents of the SI base units by which the named unit is defined.	X
2	UnitType	IfcUnitEnum	[1:1]	The type of the unit.	X

 

EXPRESS Specification

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

 

 

 

 

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