PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Bitcoins were trading at $259.02 apiece at 1:17 p.m. in New York on Bitstamp, one of the more active Web-based exchanges where Bitcoins are traded for dollars, euros and other currencies.
http://www.w3.org/ns/prov#wasQuotedFrom
  • openruby.com