About: http://webisa.webdatacommons.org/8831000

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	Hmmm...Just need to confirm do you mean we can not create/update any (in this case .json) server side file from only EXTJS4..and for this we need to use our programing language e.g. java in my case..????
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com