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Linked Data and Libraries: What? Why? How?

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Presented for Reaching Across Illinois Libraries System (RAILS) on October 7, 2015

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Linked Data and Libraries: What? Why? How?

  1. 1. Linked Data and Libraries: What? Why? How? Emily Dust Nimsakont Head of Cataloging & Resource Management Schmid Law Library, University of Nebraska College of Law RAILS Webinar October 7, 2015Photo credit: http://www.flickr.com/photos/mytudut/5197551003/
  2. 2. What is Linked Data?
  3. 3. “It builds upon standard Web technologies such as HTTP and URIs, but rather than using them to serve web pages for human readers, it extends them to share information in a way that can be read automatically by computers.” “This enables data from different sources to be connected and queried.” “…linked data describes a method of publishing structured data so that it can be interlinked and become more useful.” http://en.wikipedia.org/wiki/Linked_data
  4. 4. web of documents vs. web of data
  5. 5. resource resource resource resource resource links to links to links to links to links to
  6. 6. data links to links to links to links to data data data data data data data data data data datalinks to
  7. 7. Relationships are key Photo credit: http://www.flickr.com/photos/brenda-starr/3509344100/
  8. 8. Encoded meaning <h1>This is a heading.</h1> <p>This is a paragraph.</p> <h1>My Favorite Trees</h1> <p>I like oak trees.</p> <p>I also like maple trees.</p>
  9. 9. Encoded meaning <rdf:Description rdf:about="http://www.recshop.fake/cd/Empire Burlesque"> <cd:artist>Bob Dylan</cd:artist> <cd:country>USA</cd:country> <cd:company>Columbia</cd:company> <cd:price>10.90</cd:price> <cd:year>1985</cd:year> </rdf:Description> http://www.w3schools.com/rdf/rdf_example.asp
  10. 10. Links between entities <rdf:Description rdf:about=“http://www4.wiwiss.fu- berlin.de/bookmashup/books/0375507256”> <rev:hasReview rdf:resource=“http://www4.wiwiss.fu- berlin.de/bookmashup/reviews/0375507256_EditorialReview1 ”/> <dc:creator rdf:resource=“http://www4.wiwiss.fu- berlin.de/bookmashup/persons/David+Mitchell”/> <dc:format>Paperback</dc:format> <dc:identifier rdf:resource=“urn:ISBN:0375507256”/> <dc:publisher>Random House Trade Paperbacks</dc:publisher> <dc:title>Cloud Atlas: A Novel</dc:title> </rdf:Description> http://commonplace.net/2009/06/linked-data-for-libraries/
  11. 11. 1. Data instead of documents 2. Relationships are key 3. Encoded meaning 4. Links between entities So what?
  12. 12. Linked Data makes the Web into a database.
  13. 13. “Just as the traditional document Web can be crawled by following hypertext links, the Web of Data can be crawled by following RDF links. Working on the crawled data, search engines can provide sophisticated query capabilities... Because the query results themselves are structured data, not just links to HTML pages, they can be immediately processed, thus enabling a new class of applications based on the Web of Data.” Chris Bizer, Richard Cyganiak, and Tom Heath How to Publish Linked Data on the Web http://linkeddata.org/docs/how-to-publish
  14. 14. Why should librarians care about Linked Data? Photo credit: https://www.flickr.com/photos/stovak/2378145902/
  15. 15. “…the Library community’s data carrier, MARC, is ‘based on forty-year-old techniques for data management and is out of step with programming styles of today.’” “…something new is now needed…” “The new bibliographic framework project will be focused on…Linked Data principles and mechanisms…” “A Bibliographic Framework for the Digital Age” http://www.loc.gov/marc/transition/news/framework-103111.html
  16. 16. BIBFRAME Bibliographic Framework Transition Initiative http://bibframe.org http://loc.gov/bibframe
  17. 17. OpenCat
  18. 18. http://files.dnb.de/svensson/UILLD2013/UILLD-submission-3-formatted-final.pdf
  19. 19. OpenCat http://files.dnb.de/svensson/UILLD2013/UILLD-submission-3-formatted-final.pdf
  20. 20. Web Visibility “When my community searches the web for something we have, we better show up as an option.” Chuck Gibson, Director & CEO Worthington Public Library “The Visible Library,” Library Journal Webcast, February 26, 2015 http://goo.gl/8NErmA
  21. 21. How does Linked Data happen?
  22. 22. Linked Data Principles Tim Berners-Lee, “Linked Data-Design Issues.” http://www.w3.org/DesignIssues/LinkedData.html Use URIs as names for things Use HTTP URIs so people can look up these names When someone looks up a URI, provide useful information, using the standards Include links to other URIs, so that they can discover more things
  23. 23. URIs Uniform Resource Identifiers = unique identifiers http://www.example.com/thing1
  24. 24. RDF Resource Description Framework Describes relationships based on triples (statements): subject-predicate-object http://www.w3.org/RDF
  25. 25. RDF subject object A Christmas Carol Charles Dickens has author predicate
  26. 26. RDF Graph Charles Dickens A Christmas Carol has author has publisher Penguin
  27. 27. RDF Graph with URIs http://id.loc.gov/authorities/ names/n78087607/ http://example.org/books/2002275771 http://example.org /hasAuthor http://example.org/hasPublisher http://example.org/publishers /12345
  28. 28. RDF <rdf:Description rdf:about=“http://example.org/books/2002275771”> <dc:creator rdf:resource=“http://id.loc.gov/authorities/names/n78 087607”/> <dc:publisher ref:resource=“http://example.org/publishers/12345” /> </rdf:Description>
  29. 29. Ontologies An ontology is a vocabulary of specific terms to be used to describe resources. Sound familiar?
  30. 30. 5 Stars of Linked Open Data ★ Available on the web ★★ Available as structured data ★★★ Available in a non-proprietary format ★★★★ Use open standards to identify things, so people can point at your stuff ★★★★★ Link your data to other people’s data to provide context http://www.w3.org/DesignIssues/LinkedData.html
  31. 31. Linked OPEN Data Photo credit: http://www.flickr.com/photos/eirikref/727551264/
  32. 32. Why should libraries care about Linked Data?
  33. 33. Changes to bibliographic data
  34. 34. In traditional cataloging, a record is one package. Author Title Bibliographic Record
  35. 35. Bibliographic Record Records can be exchanged, but there is no way to exchange the individual pieces of information within a record. Bibliographic Record Bibliographic Record
  36. 36. Person Is author of Title Bibliographic Record With Linked Data, a bibliographic record is made up of many pieces of data. And the relationships between these pieces of data are defined.
  37. 37. Person Is author of Title Bibliographic Record The boundaries of the record can be dissolved…
  38. 38. Person Is author of Title Bibliographic Record …and the data can interact with other information on the Web…
  39. 39. Person Is author of Title Bibliographic Record …and make use of other data on the web.
  40. 40. New federated search possibilities
  41. 41. New ways of searching our catalogs
  42. 42. New homes for librarians’ skills
  43. 43. Are there sources of linked library data?
  44. 44. http://id.loc.gov
  45. 45. http://viaf.org
  46. 46. http://dewey.info/
  47. 47. http://rdvocab.info/
  48. 48. http://richard.cyganiak.de/2007/10/lod/
  49. 49. What does Linked Data look like?
  50. 50. http://www.nines.org
  51. 51. http://www.civilwardata150.net/
  52. 52. http://www.openlibrary.org
  53. 53. Resources
  54. 54. How to Publish Linked Data on the Web by Chris Bizer, Richard Cyganiak, and Tom Heath http://linkeddata.org/docs/how-to-publish
  55. 55. Linked Open Data in Libraries, Archives, and Museums http://lod-lam.net/
  56. 56. ALA Linked Data Interest Group http://connect.ala.org/node/142470
  57. 57. Bibliographic Framework Transition Initiative http://www.loc.gov/bibframe http://bibframe.org
  58. 58. Thank you! Emily Dust Nimsakont Head of Cataloging & Resource Management Schmid Law Library, University of Nebraska College of Law enimsakont@gmail.com http://slideshare.net/enimsakont http://delicious.com/enimsakont/linkeddata

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