PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As is well known in the art, the optical frequency of a lightwave (such as the lightwave emitted by source 10) and the wavelength of the same lightwave are related by the formula ????????=k, wherein ??? is the optical frequency of the light wave, ?? is the wavelength of the lightwave, and k is a constant.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.fr