PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This interruption results in secondary diffraction in a plane perpendicular to the primary diffraction and allows the light used for illumination and observation to arrive and leave at angles other than normal to the plates, thereby allowing the area immediately above the critical exposure area of the plates to be free of optics associated with the aligning and gapping operation.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com