Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Source OMG Systems Modeling Language (SysML) 1.6 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind INFO UML keywords InstanceSpecification SysML keywords QuantityKind Unit Unit::quantityKind ValueType::quantityKind Unit::definitionURI QuantityKind::definitionURI Keywords scientific unit system VIM3 Previous snippet Two such InstanceSpecifications represent the same "kind-of-quantity" if and only if their definitionURIs have values and their values are equal. Full quote The only valid use of a QuantityKind instance is to be referenced by the quantityKind property of a ValueType or Unit. Next snippet Related snippets SysML ValueType adds an ability to carry a unit of measure and quantity kind associated with the value. A quantity kind is a kind of quantity that may be stated in terms of defined units, but does not restrict the selection of a unit to state the value. A unit is a particular value in terms of which a quantity of the same quantity kind may be expressed. quantityKind : InstanceSpecification [0..1] A kind of quantity, represented by an InstanceSpecification classified by a kind of SysML QuantityKind, that may be stated by means of units. A value type may optionally specify a quantity kind without any unit. unit : InstanceSpecification [0..1] A unit, represented by an InstanceSpecification classified by a kind of SysML Unit, in terms of which the magnitudes of other quantities that have the same quantity kind can be stated. A QuantityKind is a kind of quantity that may be stated by means of defined units. For example, the quantity kind of length may be measured by units of meters, kilometers, or feet. QuantityKind is defined as a non-abstract SysML Block defined in the SysML UnitAndQuantityKind model library. QuantityKind is defined as a non-abstract SysML Block defined in the SysML UnitAndQuantityKind model library. QuantityKind, or a specialization of it, classifies an InstanceSpecification to define a particular "kind-of-quantity" in the sense of an "aspect common to mutually comparable quantities" [VIM3-1.2], ... Modelers specialize QuantityKind as done in SysMLs QUDV model library or in a similar manner in other model libraries. The definitionURI of an InstanceSpecification classified by a kind of QuantityKind identifies the particular "kind-of-quantity" [VIM3-1.2] that the InstanceSpecification represents. Related snippets (backlinks) A DerivedQuantityKind is a QuantityKind that represents a kind of quantity that is defined as a product of powers of one or more other kinds of quantity. A DerivedQuantityKind may also be used to define a synonym kind of quantity for another kind of quantity. For example “velocity” can be specified as the product of “length” to the power one times “time” to the power minus one, and subsequently “speed” can be specified as “velocity” to the power one. Visit also Visit also (backlinks) Flags
