PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • When propagating optical waves (such as through an optical waveguide integrated onto a substrate), it is desirable to be able to switch, modulate, or otherwise transform, those optical waves in response to a signal, such as can easily be done when propagating electromagnetic signals.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com