Unit Class Types

Unit classes can be standard, composite, or multidimensional.

Standard Unit Class

Standard unit classes represent units which are not made up of other units. Distance, for example, is an irreducible unit; it is not made up of other units.

Composite Unit Class

Composite unit classes represent units defined by other units. For example, Speed is distance/time. Speed units are composed of distance units divided by time units.

Multidimensional Class

Much like a composite class, a multidimensional class is composed of standard units, but only of the same type. Area is a multidimensional class made up of a distance times a distance. It is distance in two dimensions.