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, "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.
  • NCompass Live: Linked Data and Libraries: What? Why? How?

    1. 1. Linked Data and Libraries: What? Why? How? Emily Dust Nimsakont Nebraska Library Commission NCompass LivePhoto credit: January 11, 2012
    2. 2. An announcement fromthe Library of Congress…Photo credit:
    3. 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”
    4. 4. What isLinkedData?
    5. 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.”
    6. 6. Semantic Web vs. Linked Data
    7. 7. web of documents vs. web of data
    8. 8. resource links to resource links to links to resource links to links to resourceresource
    9. 9. data links to data data links to data links to datadata links to data data data links to data data data
    10. 10. Relationships are key Photo credit:
    11. 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. 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>
    13. 13. Links between entities<rdf:Description rdf:about=“http://www4.wiwiss.fu-”><rev:hasReview rdf:resource=“http://www4.wiwiss.fu-” /><dc:creator rdf:resource=“http://www4.wiwiss.fu-”/><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>
    14. 14. data links to data data links to data links to datadata links to data data data links to data data data
    15. 15. 1. Data instead of documents2. Relationships are key3. Encoded meaning4. Links between entitiesSo what?
    16. 16. Linked Datamakes theWeb into adatabase.
    17. 17. How doesLinked Data happen?
    18. 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.”
    19. 19. URIsUniform Resource Identifiers = unique identifiers
    20. 20. RDF Resource Description FrameworkDescribes relationships based on triples (statements): subject-predicate-object
    21. 21. RDF predicate subject object hasA Christmas author Charles Carol Dickens
    22. 22. RDF Graph has author A Christmas has Carol publisherCharlesDickens Penguin
    23. 23. RDF Graph with URIs hasAuthor names/n78087607/ /12345
    24. 24. RDF<rdf:Description rdf:about=“”><dc:creator rdf:resource=“ 87607”/><dc:publisher ref:resource=“” /></rdf:Description>
    25. 25. OntologiesAn ontology is a vocabulary of specificterms to be used to describe resources. Sound familiar?
    26. 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
    27. 27. Linked OPEN DataPhoto credit:
    28. 28. Why shouldlibraries careabout Linked Data?
    29. 29. Changes tobibliographic data
    30. 30. Bibliographic Record In traditionalAuthor cataloging, aTitle record is one package.
    31. 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. 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. 33. The Bibliographic Record boundariesPerson of the record canIs author of be dissolved…Title
    34. 34. …and the Bibliographic Record data can interact withPerson otherIs author of information on theTitle Web…
    35. 35. …and make Bibliographic Record use of otherPerson data on the web.Is author ofTitle
    36. 36. New federated searchpossibilities
    37. 37. New waysof searchingour catalogs
    38. 38. New homes for librarians‟ skills
    39. 39. Are there sources oflinked library data?
    40. 40.
    41. 41.
    42. 42.
    43. 43.
    44. 44.
    45. 45. What doesLinked Data look like?
    46. 46.
    47. 47.
    48. 48.
    49. 49. Resources
    50. 50. The Thirty Minute Guide to RDF and Linked Data by Ian Davis and Tom Heath guide-to-rdf-and-linked-data
    51. 51. Be Part of the Web - Not Just On It: Report of the Stanford Linked Data Workshop, 27 June - 1 July 2011
    52. 52. Linked Open Data in Libraries, Archives, and Museums
    53. 53. Managing Metadata by Laura Smart
    54. 54. ALA Linked Data Interest Group
    55. 55. Bibliographic Framework Transition Initiative
    56. 56. BIBFRAME listserv
    57. 57. Thank you! Emily Dust Nimsakont Cataloging Librarian Nebraska Library Commission