PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Optical deflectors can be discrete elements made from glass or clear plastic, or alternatively can be formed from a semiconductor material, such as silicon. [0003] Optical filters, as with most optical devices, are susceptible to changes in such operating parameters as temperature, device age, device characteristics, contact, pressure, vibration, etc.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com