PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Another report, Energy Price Volatility and Forecast Uncertainty (PDF), describes how markets assign a price to risk, and how the market-clearing process for risk transfer can be used to generate price bands around observed futures prices for crude oil, natural gas, and other commodities.
http://www.w3.org/ns/prov#wasQuotedFrom
  • environmentalleader.com