PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As referred to herein, an ???optical signal??? refers to any electromagnetic radiation pulse including gamma rays, X-rays, ultraviolet light, visible light, infrared, microwaves, radio waves (ULF, VLF, LF, MF, HF, long, short, HAM, VHF, UHF, SHF, EHF), cosmic microwave background radiation and other forms of radiation of the electromagnetic spectrum.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.co.uk