reuse QUDT or another UoM ontology

[VladimirAlexiev]

There are a number of classes/props that describe units of measure and their characteristics, eg:

UnitOfMeasure
UnitQuantity
ExternalUnitOfMeasure
ExternalUnitQuantity
baseForConversion
memberUnits

However, these don't capture all the complexity of UOMs, eg dimension vectors, conversion factors, systems of units, etc.

Reuse a well established ontology of UoM, eg QUDT, rather than making your own partial ontology.