PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, the principles described herein are equally applicable to the detection and measurement of a wide variety of other gases; for example, methane, carbon dioxide and other gases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com