Going through the (old) Open PHACTS (https://web.archive.org/web/20190127095843/http://www.openphacts.org/) website I just found some more great resources for this project:
- Encoding Units and Unit Types in RDF (https://web.archive.org/web/20150912011738/http://www.openphacts.org/specs/2013/WD-units-20130913/)
- Guidelines for Exposing Data as RDF (https://web.archive.org/web/20150910133201/http://www.openphacts.org/specs/2013/WD-rdfguide-20131007/)
- QUDT - Quantities, Units, Dimensions and Data Types Ontologies (http://www.qudt.org/)
- Ontology of Units of Measurement (http://www.obofoundry.org/ontology/uo.html)
If only the guys developing SWEET (https://github.com/ESIPFed/sweet) and those developing QUDT at NASA could join forces with NIST and UnitsML (https://unitsml.nist.gov/) then we could have something definitive... (as of 12/1/20 there is something brewing at https://www.bipm.org/en/committees/cc/wg/cipm-tgdsi.html)
SJC