Tags and keywords
The links typed by Associations are only shown to reveal some of the underlying QUDV machinery, you don't need those to create your own Units and ValueTypes.
lengthfrom the QUVD ModelLibrary has the SimpleUnit
metre. Another SimpleQuantityKind
radiusis linked to it, corresponding to an Association in the QUVD ModelLibrary that has one end 'general', which appears on the
radiusinstance as a Slot assigned the value
length(noting Generalization can't be used with instances).
radius are linked to the same
ISO 80000-3 Quantities.
Generalization can be used with ValueType to reuse and adapt
radius. Why extend ? Here's just one possible reason: