Relation UNIT-MAGNITUDE-AS

(unit-value-as Measure UnitString Number) Relates a Measure to its magnitude in the given unit
as long as `Measure' and `UnitString' are compatible.
Arity: 3
Range: Number
Axioms:
(Nth-Domain Unit-Magnitude-As 2 String)

(Nth-Domain Unit-Magnitude-As 1 Measure)