About: http://webisa.webdatacommons.org/236999732

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	diffraction grating, various other materials, such as metals, metal oxides, and nonmetals including dielectrics, for example, can be used. Also, the lens and the diffraction grating can be integrally molded with plastics.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com