Units: How to deal with units not defined in QUDT?
QUDT, which we decided to use early on for our quantities, is a very complete set of units of measure, with conversion capabilities, for the scientific community. They even have complex units, like GallonUSPerDay. Here is our initial definition: https://github.com/valueflows/valueflows/pull/5/files
QUDT also is adding other kinds of units, like Currency, but as far as I can tell, this is not ready yet. And it will never have Faircoin. :)
Here also is an older issue #152 (closed) with suggestion for units of time.
But.... Here is a group extending QUDT: http://www.openphacts.org/specs/2013/WD-units-20130913/.
And here is a discussion in schema.org about how to map to qudt - they have a lot of units defined also. https://github.com/schemaorg/schemaorg/issues/1390
So, this issue is to nail down how we will define quantities and units, since it affects our core entities. Should we:
- Show how to define new units in QUDT, even define some we know are needed? And define our vf:quantity to only be defined in QUDT?
- Allow a vf:quantity property to reference different vocabulary definitions of instances of units?