PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This dual nature is a property of all forms of radiation and matter and is comprehensively described by the theory of quantum mechanics.Though it was immediately suspected, following R??ntgen???s discovery, that X-rays were a form of electromagnetic radiation, this proved very difficult to establish.
http://www.w3.org/ns/prov#wasQuotedFrom
  • britannica.com