About: http://webisa.webdatacommons.org/100820924

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 example code of FIG. 3 constrains the length of a username to between 5 and 15 characters, and constrains the username from including characters other than letters, numbers and underscores.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com