PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These requirements are difficult to achieve, particularly if the signal to be used is not under the control of the surveillance system designer Accurate measurements of Doppler frequency (time rate of change of signal delay), on the other hand, can often be obtained on signal waveforms which do not support useful time delay measurements.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com