TR292D Quantity Ontology v1.0.0

This document defines quantities and a set of operator functions that allow to define, modify, combine and compare quantity objects.  Defining goals based on KPIs and metrics is a common task in intent expression. They often consist of a numerical value in combination with a unit. Quantities, as defined in this document are exactly that: a class with properties representing a numerical literal in combination with a unit expression. This document also defines operations for constructing, modifying and combining quantities. Further operators allow comparing and derive inference from quantities.