PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Daysimeter, shown above, measures an individual's daily rest and activity patterns, as well as exposure to circadian light -- short-wavelength light, particularly natural light from the blue sky, that stimulates the circadian system.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sciencedaily.com