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Introducing Linked Data

Introducing Linked Data. ISD Spotlight Presented by Alison Hitchens 2013. Objective. To introduce the concept of linked data without too much technical stuff!

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Introducing Linked Data

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  1. Introducing Linked Data ISD Spotlight Presented by Alison Hitchens 2013

  2. Objective • To introduce the concept of linked data without too much technical stuff! (because every conference you attend these days mentions linked data or linked open data or linked library data or linked open library data!) (or you will see tweets with #lod #lodlam) Introducing Linked Data

  3. Definition of Linked Data "describes a method of publishing structured data so that it can be interlinked and become more useful. It builds upon standard Web technologies such as HTTP, RDF 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.” (emphasis added) Introducing Linked Data From Wikipedia linked data page

  4. Human-readable vs. machine-actionable* • Look at this Wikipedia page and tell me what you know about Margaret Atwood from looking at the page *rather than machine-readable, library consultant Karen Coyle often uses the term actionable data, which I find easier to understand. See her Library Technology Report on the semantic web. Introducing Linked Data

  5. The classic web Click on link text or URL Margaret Atwood Wikipedia Margaret Atwood homepage URL resource resource Introducing Linked Data Inspired by a slide by Eric Miller

  6. A linked data web person Alison’s guide to Margaret Atwood Is subject of Margaret Atwood Is type of Has homepage Undefined URL link http://margaretatwood.ca/ Introducing Linked Data Inspired by a semantic web slide by Eric Miller

  7. Use Structured Data Textual data Currency Date Introducing Linked Data

  8. Identify your data • This resource is a person • Name: “Margaret Atwood” • Birth date: 19391118 • Place of birth: Ottawa, Ontario • Occupation: novelist • Occupation: poet • Author of: “The Handmaid’s Tale” Introducing Linked Data

  9. Publish your data on the web • The Virtual International Authority File (VIAF) combines authorities from many national libraries and has made the records available on the web • With a permanent identifier • In multiple web-friendly formats Go to Record for Margaret Atwood in VIAF Introducing Linked Data

  10. Make connections • Build connections between your data records and other datasets • Many datasets link to DbPedia which is the data behind Wikipedia Go to DbPedia page for Margaret Atwood and find the VIAF identifier Introducing Linked Data

  11. The famous linked data cloud • The linked data cloud shows the connections between datasets on the web Excerpt from: “Linking Open Data cloud diagram, by Richard Cyganiak and AnjaJentzsch. http://lod-cloud.net/” Introducing Linked Data

  12. Connect your data • This resource is a person • Use class of persons from the Friend of a Friend (FOAF)ontology • Place of birth: Ottawa, Ontario • Could link to Geonames • Occupation: novelist • Could link to LCSH term • Author of: “The Handmaid’s Tale” • Could link to The Open Library page Introducing Linked Data

  13. Library Use Cases* • Enrich our bibliographic data • Enrich our authority data • Align subject vocabularies • Share our unique collections and information *for our next linked data session! Introducing Linked Data

  14. Some technical stuff* • Ideally everything has a uniform resource identifier (URI) e.g. http://viaf.org/viaf/109322990 • Data is modeled using Resource Description Framework (RDF) • Use a common format such as Extensible Markup Language (XML) *for our next linked data session! Introducing Linked Data

  15. Some resources • Colye, Karen. Understanding the semantic web: bibliographic data and metadata. Chicago: American Library Association, 2010 (Library Technology reports ; v. 46, no. 1) access at http://www.metapress.com.proxy.lib.uwaterloo.ca/content/g212v1783607/ (subscription required) • Harper, Corey. Library linked data: tuning library metadata for the semantic web. An ALCTS webcast, March 16. 2011. access at http://www.ala.org/alcts/confevents/upcoming/webinar/cat/031611(open access) • Berners-Lee, Tim. The next web. A TED talk, February 2009. access at http://www.ted.com/talks/tim_berners_lee_on_the_next_web.html (open access) • Heath, Tom and Christian Bizer (2011) Linked Data: Evolving the Web into a Global Data Space. 1st ed.Morgan & Claypool, 2011. (Synthesis Lectures on the Semantic Web: Theory and Technology, 1:1) http://linkeddatabook.com/editions/1.0/(open access) Introducing Linked Data

  16. Acknowledgments • Thank you to library consultant Karen Coyle who explains these concepts in such a straight-forward way • Thank you to Corey Harper at NYU and MJ Suhonos who are very patient and encouraging; they have answered many of my LOD questions and reviewed presentations for me Introducing Linked Data

  17. Thanks! Alison Hitchens Cataloguing & Metadata Librarian University of Waterloo Library ahitchen@uwaterloo.ca Introducing Linked Data

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