About: http://webisa.webdatacommons.org/31643420

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 condition or restriction that a use case operates under and includes pre-, post- and invariant conditions.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com