Introduction To Linked Data
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  • Best way is to look at some examples
  • Keep it simple Actually publish and connect data Start joining up what is available

Transcript

  • 1. Leigh Dodds Programme Manager, Talis Platform Talis 25 th June 2009 http://creativecommons.org/licenses/by/2.0/uk/ An Introduction to Linked Data
  • 2. Overview
    • What is RDF?
    • Historical Issues with the Semantic Web
    • Linked Data
    • The Linking Open Data Project
    • Practical Steps
    • Closing Points
  • 3. What Is RDF? http://www.flickr.com/photos/-bast-/349497988/
  • 4. Apollo 11 was launched from Cape Canaveral
  • 5. Apollo 11 was launched from Cape Canaveral Subject Predicate Object
  • 6. <http://nasa.dataincubator.org/spacecraft/apollo-11> <http://purl.org/net/schemas/space/launchsite> <http://nasa.dataincubator.org/launchsite/capecanaveral>.
  • 7.  
  • 8.  
  • 9. Why has it taken so long? http://www.flickr.com/photos/caitlinator/3009659704/
  • 10. The Technology Problem
  • 11. The Babel Problem
  • 12. The AI Problem
  • 13. Linked Data A grass roots approach http://www.flickr.com/photos/66164549@N00/2800038473
  • 14. “ Linked Data is the Web done right” – Tim Berners-Lee
  • 15. The Web of Documents Links Between Documents, not Things Data only loosely structured Meaning of links is implicit
  • 16. Web 2.0 Web 2.0 Increasingly structured data Little linking between sites No standardization across APIs
  • 17. Linked Data Standard Data Model Link together datasets across the web Add value through network effects
  • 18. http://www.flickr.com/photos/fabiovenni/478239267/ The Linking Open Data Project
  • 19. The LOD &quot;Cloud&quot; - May 2007
  • 20. The LOD &quot;Cloud&quot; - July 2007
  • 21. The LOD &quot;Cloud&quot; - August 2007
  • 22. The LOD &quot;Cloud&quot; - November 2007
  • 23. The LOD &quot;Cloud&quot; – Feb 2008
  • 24. The LOD &quot;Cloud&quot; – Sept 2008
  • 25.  
  • 26.  
  • 27. Practical Pointers A step-by-step approach to publishing Linked Data http://www.flickr.com/photos/visualpanic/2422742902
  • 28. http://www.flickr.com/photos/kubina/941699149
    • Identify Your Data
    • What might you usefully publish?
    • Where is it stored?
    • How is maintained?
  • 29. http://www.flickr.com/photos/tillwe/603936954
    • Identify Objects of Collective Interest
    • Assign them a unique URL
    • Ensure those URLs are stable
    • Think about more than just “content”
    • At this stage don't think about the user experience
  • 30. http://www.flickr.com/photos/wilhei/109404222/ Publish Human & Machine Readable Data A page for each object with human and machine-readable views RDFa can be used to embed data into HTML Provide links between objects
  • 31. http://www.flickr.com/photos/uncommondepth/3204094812/
    • Ensure Licensing is Clear
    • Creative Commons
    • Open Data Licenses
    • Attach licenses to content and data
  • 32. http://flickr.com/photos/bekathwia/2170338717 Link into the Web of Data Stitch your data into the Linked Data Cloud Use DbPedia as a linking hub
  • 33.
    • Additional Benefits
    • Produces flexible, well-structured sites
    • Search engine optimised
    • Encourages reuse, linking
  • 34. Closing Points Linked Data is a natural evolution of the web Web of data is growing rapidly Need for more authoritative and quality sources http://www.flickr.com/photos/vshioshvili/2093112220
  • 35. Further Reading
    • Linked Data
    • http://linkeddata.org
    • Building coherence at bbc.co.uk
    • http://derivadow.com/2009/01/30/building-coherence-at-bbccouk/
    • Your Website is Your API: Quick Wins for Government Data
    • http://www.jenitennison.com/blog/node/100
  • 36. shared innovation