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
  • Introduction To Linked Data

    1. 1. Leigh Dodds Programme Manager, Talis Platform Talis 25 th June 2009 An Introduction to Linked Data
    2. 2. Overview <ul><li>What is RDF? </li></ul><ul><li>Historical Issues with the Semantic Web </li></ul><ul><li>Linked Data </li></ul><ul><li>The Linking Open Data Project </li></ul><ul><li>Practical Steps </li></ul><ul><li>Closing Points </li></ul>
    3. 3. What Is RDF?
    4. 4. Apollo 11 was launched from Cape Canaveral
    5. 5. Apollo 11 was launched from Cape Canaveral Subject Predicate Object
    6. 6. <> <> <>.
    7. 9. Why has it taken so long?
    8. 10. The Technology Problem
    9. 11. The Babel Problem
    10. 12. The AI Problem
    11. 13. Linked Data A grass roots approach
    12. 14. “ Linked Data is the Web done right” – Tim Berners-Lee
    13. 15. The Web of Documents Links Between Documents, not Things Data only loosely structured Meaning of links is implicit
    14. 16. Web 2.0 Web 2.0 Increasingly structured data Little linking between sites No standardization across APIs
    15. 17. Linked Data Standard Data Model Link together datasets across the web Add value through network effects
    16. 18. The Linking Open Data Project
    17. 19. The LOD &quot;Cloud&quot; - May 2007
    18. 20. The LOD &quot;Cloud&quot; - July 2007
    19. 21. The LOD &quot;Cloud&quot; - August 2007
    20. 22. The LOD &quot;Cloud&quot; - November 2007
    21. 23. The LOD &quot;Cloud&quot; – Feb 2008
    22. 24. The LOD &quot;Cloud&quot; – Sept 2008
    23. 27. Practical Pointers A step-by-step approach to publishing Linked Data
    24. 28. <ul><li>Identify Your Data </li></ul><ul><li>What might you usefully publish? </li></ul><ul><li>Where is it stored? </li></ul><ul><li>How is maintained? </li></ul>
    25. 29. <ul><li>Identify Objects of Collective Interest </li></ul><ul><li>Assign them a unique URL </li></ul><ul><li>Ensure those URLs are stable </li></ul><ul><li>Think about more than just “content” </li></ul><ul><li>At this stage don't think about the user experience </li></ul>
    26. 30. 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
    27. 31. <ul><li>Ensure Licensing is Clear </li></ul><ul><li>Creative Commons </li></ul><ul><li>Open Data Licenses </li></ul><ul><li>Attach licenses to content and data </li></ul>
    28. 32. Link into the Web of Data Stitch your data into the Linked Data Cloud Use DbPedia as a linking hub
    29. 33. <ul><li>Additional Benefits </li></ul><ul><li>Produces flexible, well-structured sites </li></ul><ul><li>Search engine optimised </li></ul><ul><li>Encourages reuse, linking </li></ul>
    30. 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
    31. 35. Further Reading <ul><li>Linked Data </li></ul><ul><li> </li></ul><ul><li>Building coherence at </li></ul><ul><li> </li></ul><ul><li>Your Website is Your API: Quick Wins for Government Data </li></ul><ul><li> </li></ul>
    32. 36. shared innovation
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