About: http://webisa.webdatacommons.org/315783456

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	discs such as video discs, and more particularly, to removal of material cut away from the disc master during the process of forming a spiral groove and/or signal-information-representative topography therein.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr