PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Some of this information is publicly available, including data on the overall supply, demand, and marketing of the underlying commodity; futures, option, and cash prices; and trading volume and open interest data.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cftc.gov