PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • To cope with this, a protective film formed of a hard material such as carbon and a lubricating layer for reducing the friction and wearing of the protective film to improve the durability of the magnetic disk are formed on a recording layer of the magnetic disk.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com