PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • 20150042307METHOD AND APPARATUS FOR TONE TRACING AND TAGGING USING MOBILE COMPUTER DEVICE - The industry practice to detect and identify objects such as wires, cables, pipes and tuned coils is to inject a known tone from a tone generator into the object by conduction or induction, occasionally with tagging information.
http://www.w3.org/ns/prov#wasQuotedFrom
  • faqs.org