PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Current methods and systems for air-to-air refueling of other types of aircraft have not been easily applied to UAVs due to the nature of pilot control generally required in air-to-air refueling operations. [0003] There are currently two primary systems for air-to-air refueling.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.fr