NCompass Live: Linked Data and Libraries: What? Why? How?

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In October of 2011, the Library of Congress released a statement outlining its efforts to move away from the MARC 21 format and toward another carrier for library data. According to the statement, …

In October of 2011, the Library of Congress released a statement outlining its efforts to move away from the MARC 21 format and toward another carrier for library data. According to the statement, "Linked Data principles and mechanisms" will be the focus of this project. You may be wondering, what is Linked Data? What could it mean for our library catalogs? How do we create Linked Data? In this session, Emily Nimsakont, the NLC’s Cataloging Librarian, will answer those questions and more.
NCompass Live - Jan. 11, 2012.

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  • Linked Data makes the Web into an API.
  • The elements of author, title, etc., only really have meaning in the context of the record.
  • MARC format, our encoding standard, is set up to exchange records, not data.

Transcript

  • 1. Linked Data and Libraries: What? Why? How? Emily Dust Nimsakont Nebraska Library Commission NCompass LivePhoto credit: http://www.flickr.com/photos/mytudut/5197551003/ January 11, 2012
  • 2. An announcement fromthe Library of Congress…Photo credit: http://www.flickr.com/photos/alwright1/2613979675/
  • 3. “…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
  • 4. What isLinkedData?
  • 5. “…linked data describes a method ofpublishing structured data so that it can beinterlinked and become more useful.” “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 sourcesto be connected and queried.” http://en.wikipedia.org/wiki/Linked_data
  • 6. Semantic Web vs. Linked Data
  • 7. web of documents vs. web of data
  • 8. resource links to resource links to links to resource links to links to resourceresource
  • 9. data links to data data links to data links to datadata links to data data data links to data data data
  • 10. Relationships are key Photo credit: http://www.flickr.com/photos/brenda-starr/3509344100/
  • 11. 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>
  • 12. 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
  • 13. 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/
  • 14. data links to data data links to data links to datadata links to data data data links to data data data
  • 15. 1. Data instead of documents2. Relationships are key3. Encoded meaning4. Links between entitiesSo what?
  • 16. Linked Datamakes theWeb into adatabase.
  • 17. How doesLinked Data happen?
  • 18. Linked Data Principles Use HTTP URIs so Use URIs as names people can look up for things these namesWhen someone looks up a URI, provide Include links to other useful URIs, so that they caninformation, using the discover more things standards Tim Berners-Lee, “Linked Data-Design Issues.” http://www.w3.org/DesignIssues/LinkedData.html
  • 19. URIsUniform Resource Identifiers = unique identifiers http://www.example.com/thing1
  • 20. RDF Resource Description FrameworkDescribes relationships based on triples (statements): subject-predicate-object http://www.w3.org/RDF
  • 21. RDF predicate subject object hasA Christmas author Charles Carol Dickens
  • 22. RDF Graph has author A Christmas has Carol publisherCharlesDickens Penguin
  • 23. RDF Graph with URIs http://example.org/ hasAuthor http://example.org/books/2002275771 http://example.org/hasPublisherhttp://id.loc.gov/authorities/ names/n78087607/ http://example.org/publishers /12345
  • 24. RDF<rdf:Description rdf:about=“http://example.org/books/2002275771”><dc:creator rdf:resource=“http://id.loc.gov/authorities/names/n780 87607”/><dc:publisher ref:resource=“http://example.org/publishers/12345” /></rdf:Description>
  • 25. OntologiesAn ontology is a vocabulary of specificterms to be used to describe resources. Sound familiar?
  • 26. 5 Stars of Linked Open Data★ Available on the web★★ Available as structured data★★★ Available in a non-proprietary format★★★★ Use open standards to identifythings, so people can point at your stuff★★★★★ Link your data to other people‟sdata to provide context http://www.w3.org/DesignIssues/LinkedData.html
  • 27. Linked OPEN DataPhoto credit: http://www.flickr.com/photos/eirikref/727551264/
  • 28. Why shouldlibraries careabout Linked Data?
  • 29. Changes tobibliographic data
  • 30. Bibliographic Record In traditionalAuthor cataloging, aTitle record is one package.
  • 31. Bibliographic Record Bibliographic RecordBibliographic Record Records can be exchanged, but there is no way to exchange the individual pieces of information within a record.
  • 32. With Linked Data, a bibliographic recordis made up of many pieces of data. Bibliographic Record Person And the relationships Is author of between these pieces of data are Title defined.
  • 33. The Bibliographic Record boundariesPerson of the record canIs author of be dissolved…Title
  • 34. …and the Bibliographic Record data can interact withPerson otherIs author of information on theTitle Web…
  • 35. …and make Bibliographic Record use of otherPerson data on the web.Is author ofTitle
  • 36. New federated searchpossibilities
  • 37. New waysof searchingour catalogs
  • 38. New homes for librarians‟ skills
  • 39. Are there sources oflinked library data?
  • 40. http://id.loc.gov
  • 41. http://viaf.org
  • 42. http://dewey.info/
  • 43. http://rdvocab.info/
  • 44. http://richard.cyganiak.de/2007/10/lod/
  • 45. What doesLinked Data look like?
  • 46. http://www.nines.org
  • 47. http://www.civilwardata150.net/
  • 48. http://www.openlibrary.org
  • 49. Resources
  • 50. The Thirty Minute Guide to RDF and Linked Data by Ian Davis and Tom Heathhttp://www.slideshare.net/iandavis/30-minute- guide-to-rdf-and-linked-data
  • 51. Be Part of the Web - Not Just On It: Report of the Stanford Linked Data Workshop, 27 June - 1 July 2011http://www.clir.org/pubs/reports/pub152/LinkedDataWorkshop.pdf
  • 52. Linked Open Data in Libraries, Archives, and Museums http://lod-lam.net/
  • 53. Managing Metadata by Laura Smarthttp://library.caltech.edu/laura/
  • 54. ALA Linked Data Interest Group http://connect.ala.org/node/142470
  • 55. Bibliographic Framework Transition Initiative http://www.loc.gov/marc/transition/
  • 56. BIBFRAME listservhttp://listserv.loc.gov/listarch/bibframe.html
  • 57. Thank you! Emily Dust Nimsakont Cataloging Librarian Nebraska Library Commission emily.dust.nimsakont@nebraska.gov 800-307-2665www.delicious.com/NLC_Reference/ncompasslive+linkeddata www.slideshare.net/nebraskaccess