About: http://webisa.webdatacommons.org/61006913

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	A constraint is a relation defined on a sequence of variables , called the scheme of . , is the subset of that contains the combinations of values (or tuples) that satisfy . is called the arity of .
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com