PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For example (to make a slight variation of papakwanz's point), if existence were a predicate, you could define a superunicorn to be something that has all the usual properties of a unicorn (body of a horse, single horn, etc.) plus the property of existence.
http://www.w3.org/ns/prov#wasQuotedFrom
  • metafilter.com