]>
baseDimension
baseQuantityKind
baseUnit
dimension
factor
generalQuantityKind
prefix
quantityKind
referenceUnit
scale
scaleValueDefinition
specificQuantityKind
systemOfQuantities
unit
conversionFactor
conversionOffset
definitionURI
URI that contains an authoritative definition of the referent thing
description
exponent
conversionExpression
name
human-readable word or sequence of words by which a thing is known
numericalValue
symbol
short symbolic name
symbolicExpression
unitMultipleFactor
ConversionBasedUnit
1
DerivedQuantityKind
DerivedUnit
Dimension
1
A Dimension represents the [VIM] concept of 'quantity dimension' that is defined as 'expression of the dependence of a quantity on the base quantities of a system of quantities as a product of powers of factors corresponding to the base quantities, omitting any numerical factor.'
For example in the ISQ the quantity dimension of 'force' is denoted by dim F = Lï¿½Mï¿½T^2, where 'F' is the symbol for 'force', and 'L', 'M', 'T' are the symbols for the ISQ base quantities 'length', 'mass' and 'time' respectively.
The Dimension of any QuantityKind can be derived through the algorithm that is defined in C.5.3.20 with SystemOfQuantities. The actual Dimension for a given QuantityKind depends on the choice of baseQuantityKind specified in a SystemOfQuantities.
DimensionFactor
1
GeneralConversionUnit
1
LinearConversionUnit
1
Prefix
1
1
1
PrefixedUnit
1
Quantity
QuantityKind
1
1
1
1
1
QuantityKindFactor
1
1
Scale
1
ScaleValueDefinition
1
1
SimpleQuantityKind
SimpleUnit
SpecializedQuantityKind
1
SystemOfQuantities
1
1
1
1
A SystemOfQuantities represents the [VIM] concept of 'system of quantities' that is defined as a 'set of quantities together with a set of non-contradictory equations relating those quantities'. It collects a list of QuantityKind that specifies the kinds of quantity that are known in the system.
The International System of Quantities (ISQ) is an example of a SystemOfQuantities, defined in ISO 31 and ISO/IEC 80000.
SystemOfUnits
1
1
1
1
A SystemOfUnits represents the [VIM] concept of 'system of units' that is defined as 'set of base units and derived units, together with their multiples and submultiples, defined in accordance with given rules, for a given system of quantities'. It collects a list of Unit that are known in the system. A SysML SystemOfUnits only optionally defines multiples and submultiples.
Unit
1
1
1
1
1
UnitFactor
1
1