The Data Web transforms the Web from a distributed file system into a distributed database system.
Rather than webpages, pieces of data (RDF triples) and records formed from them (sets, trees, graphs or objects). Some of these could even come from databases.
Tim Berners-Lee has suggested that Data Web may be a more appropriate name for the Semantic Web. Tim O'Reilly, who coined the term Web 2.0 has mentioned that the long-term vision of the Semantic Web as a web of data, where sophisticated applications manipulate the data web.