About: http://webisa.webdatacommons.org/223047739

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	Various instrument holders can be applied to the digitizer to hold probes, suction tubes, forceps, and other instruments, and they may have a known calibrated length so as so make the mapping between physical and graphic space.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr