About: http://webisa.webdatacommons.org/273872207

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	A reflecting film of e.g. aluminum is deposited on the major surface of the disc substrate, such as by vapor deposition or sputtering.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com