About: http://webisa.webdatacommons.org/256317134

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	Take a look at AddIn framework from Microsoft as it provides some of the capabilities that you are looking for such as security and isolation.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com