PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In relation to the optical sciences, the following terms are generally understood to have the following meanings. ???Light??? refers to optical energy, or other types of electromagnetic radiation, having any wavelength (e.g., visible light or energy of longer and shorter wavelength, including laser, UV, and diode light). ???Light source??? refers to an optical signal generator for providing light
http://www.w3.org/ns/prov#wasQuotedFrom
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