About: http://webisa.webdatacommons.org/426573273

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 levels for a data element are a high voltage level (VOH) and a low voltage level (VOL), and the signal level for the reference element is a reference voltage level (VREF) .
http://www.w3.org/ns/prov#wasQuotedFrom	google.com