About: http://webisa.webdatacommons.org/173467837

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 signal may be outputted not only by an optical detecting means but also by a magnetic detecting means such as a magnetic scale magnetized at predetermined intervals.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com