PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A transmitting system including a transmitting antenna for generating electromagnetic beams to enable a distant ground receiving station to determine the offset of the pointing direction of the transmitting system antenna from the line of sight between the transmitting system and the ground receiving means comprising: a. beacon means for generating beacon signals of different frequencies;
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com