About: http://webisa.webdatacommons.org/371016409

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	it is called Image Error Level Analysis.http://errorlevelanalysis.com/ [errorlevelanalysis.com]The gist is that every time you save an e.g. JPEG, the quality will get worse.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org