Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content REFERENCE CARD: QUDV - basic metamodel QuantityKind and ValueType example - length vs radius vs radius of tire QuantityKind and ValueType example - frequency vs clock frequency vs sound frequency 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 SysML keywords Unit DerivedUnit Previous snippet Full quote A DerivedUnit is a Unit that represents a measurement unit that is defined as a product of powers of one or more other measurement units. Next snippet For example the measurement unit “metre per second” for “velocity” is specified as the product of “metre” to the power one times “second” to the power minus one. Related snippets SysML ValueType adds an ability to carry a unit of measure and quantity kind associated with the value. 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 Unit is a quantity in terms of which the magnitudes of other quantities that have the same quantity kind can be stated. Unit, or a specialization of it, classifies an InstanceSpecification to define a particular "measurement unit" in the sense of a "real scalar quantity, defined and adopted by convention, with which any other quantity of the same kind can be compared ... The only valid use of a Unit instance is to be referenced by the unit property of a ValueType stereotype. Related snippets (backlinks) For example the measurement unit “metre per second” for “velocity” is specified as the product of “metre” to the power one times “second” to the power minus one. 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
