PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • 5) Therefore, there is a sense in which Quillen's $Q$-construction is the natural first guess for what should work. (Of course the naturality of this guess appears only in hindsight; a lot of other people failed to find this construction.)
http://www.w3.org/ns/prov#wasQuotedFrom
  • mathoverflow.net