About: http://webisa.webdatacommons.org/404781930

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	Views provide a mechanism to hide from the client whether data is derived data or base data???but can???t avoidthe fact that some views are expensive to compute.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net