About: http://webisa.webdatacommons.org/396960708

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	The present invention further relates to a servo system for tracking an optical beam, such as a laser beam, on the surface of an optical disk to read out information stored on the disk or to write information on the disk.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com