PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Considering comments is a lot of work and may be impossible (private libraries), therefor they should not be part of the equation.
http://www.w3.org/ns/prov#wasQuotedFrom
  • librarything.com