PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This paper by Corballis, [google.com] is probably the best summary of recent research on the question that I am able to find a clear link to for you right now - not that it is nearly thorough enough to serve that purpose really, but it does cover a lot of ground, and most articles like this are not available without subscription.
http://www.w3.org/ns/prov#wasQuotedFrom
  • slashdot.org