Browsable data

Tim Berners-Lee
Director
World Wide Web Consortium

2 March 2006

http://www.w3.org/2006/Talks/0302-brosedata-tbl/

URIs in semantic web are real URIs

Lookup: G = Web(u)

• URIs for things derefernce to documents with info about things
• http://www.example.com/foo/bar#thing
  • Easy: data in http://www.example.com/foo/bar
• http://www.example.com/foo/bar/thing
  • Must return 303 and point to doc with data
• "Link" is use of a symbol which is use of URI in other document

Browsable data

One particular protocol

• A graph G is browsable if
  dereferencing "u" gives all arcs in G to and from <u> & attached molecules
• i.e. documents contain all outgoing and incoming links in G
• Requirement doesn't scale globally :-(
• Nice: Anchored SPARQL queries just work :-)

Tabulator: UI

• Blue dot for URI to be looked up
• Outline view: companct view of web as tree
• Re-center shift-click
• Query by example (SPARQL subset) - click on properties (not values)
• Alpha demo
• Huge to-do list

Target: iTunes, iPhoto, Quicken etc functionality from a generic browser

Tabulator: RDF

Javascript RDF library: fetch, parse, store, query

• Parse RDF (not yet N3!)
• GRDDL
• Smushing on owl:sameAs, [Inverse]FunctionalProperty
• Look up ontological closure on load
• Dereference query terms during query

Need: fast SPARQL server which will do this

Conclusion

Direct RDF publishing is really valuable and important

• Use URIs .. not just blank nodes.
• Support them with a server
• Give info searcher would probably be interested in
• Give back links
• Use µF only so long as you connect with GRDDL