About: http://webisa.webdatacommons.org/244304853

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	According to another preferred embodiment of the invention, one of the elements of the positioning assembly emits light and the other is a photosensitive element that translates the received light into a signal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com