PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As international airline pilots, we spend hours and hours cruising over continents like India, China, Russia and other places where the communication could be improved (to say the least!) and the opposite-direction traffic often has no TCAS, sometimes no transponder, and might be using a slide-rule to convert altitude assignments from feet to meters or altimeter settings from inches to millibars.
http://www.w3.org/ns/prov#wasQuotedFrom
  • avweb.com