IFLA 2012 OCLC Linked Data Roundtable

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IFLA 2012 OCLC Linked Data Roundtable

  1. 1. Martin Malmsten Head of Software Development Libris dept., National Library of SwedenTuesday, August 14, 12
  2. 2. Libris - the Swedish Union Catalogue Contribute what is unique to you, but gain access to all dataTuesday, August 14, 12
  3. 3. Swedish Union Catalogue available as Linked Data (RDF) since 2008 The National Library of Sweden released the National Bibliography and Authority file (MARC21) with a CC0 license in 2011 LIBRIS is building a new catalogue backend with SemWeb as a key technologyTuesday, August 14, 12
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  12. 12. Open National Bibliography • Swedish National Bibliography and Authority File released, in original format (MARC21), with a CC0 license • Goal is to have the whole of LIBRIS released with CC0Tuesday, August 14, 12
  13. 13. Why CC0? With 90 persons in this room, every minute I spend talking about licenses is 1.5 hour not spent on actually using dataTuesday, August 14, 12
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  19. 19. A next, next, (next?) generation catalogue • Format agnostic (MARC21, EAD, TEI, etc.) • SemWeb technology a first class citizen • Transition to RDATuesday, August 14, 12
  20. 20. Either aggregate all data OR be able to copewith the fact that data is created, updated and deleted “elsewhere”Tuesday, August 14, 12
  21. 21. Three or four big aggregates of Linked Data is not a webTuesday, August 14, 12
  22. 22. Challenges Building a big, networked, distributed graph poses some challenges, for example: 1) Who to trust? 2) Seamlessness - you often need to react to changes in other datasets, not only import dataTuesday, August 14, 12
  23. 23. Dealing with change 1) Atom feeds 2) OAI-PMH 3) No dumps - but you are free to create your ownTuesday, August 14, 12
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  26. 26. Dealing with change 3) pubsubhubbub 4) ResourceSyncTuesday, August 14, 12
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  28. 28. Conclusion 1) Actually using/consuming Linked Data, as opposed to only exposing it, removes the technical distinction between internal and external datasets. 2) Control becomes at matter of trust, not technology 3) The record disintegrates* as the data becomes distributed. *pssssst, and is possibly replaced by something called named graphsTuesday, August 14, 12
  29. 29. Linked Data Contribute what is unique to you, but gain access to all dataTuesday, August 14, 12

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