PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In math.stackexchange.com/questions/173021/??? it is shown your ring is a UFD. I doubt this helps to find units, but if you continue working with the ring, it could be quite helpful.
http://www.w3.org/ns/prov#wasQuotedFrom
  • stackexchange.com