About: http://webisa.webdatacommons.org/292973352

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	Given a set or space X, a characteristic function on X is a function whose domain is X and whose value is either 0 or 1.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net