About: http://webisa.webdatacommons.org/322744552

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	They are usually attached to some type of controller, such as a PLC, through a communication link.
http://www.w3.org/ns/prov#wasQuotedFrom	plcmentor.com