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  1. 1. Linked Open Datafor Libraries, Archives, and Museums
  2. 2. • Origins in electronic library catalogs fromthe 1970s (e.g., WorldCat, which wascreated in 1971)• Moreover, the development of librarystandards, such as MARC or Z39.50, weredesigned only for the library community inthe 1960s and 1970s, respectively.• This legacy has complicated efforts to jointhat wider search stream, and it also ledburgeoning web entities such as DBpedia,which offers a Semantic Web mirror ofWikipedia, to originally bypass library dataSource Kelley, M. (2011, Aug. 31), How the W3C Has Come To Love Library Linked Data. Library Journal Retrieved April 20, 2012 fromhttp://www.libraryjournal.com/lj/home/891826-264/how_the_w3c_has_come.html.cspLOD/LAM: Library Origins
  3. 3. • LODLAM initiative product of increasingly connected culture (MIT Sloanschool, NEH, Internet Archive)• Since January 2011, the International Linked Open Data in Libraries,Archives, and Museums Summit (“LOD-LAM”) have convene leaders intheir respective areas of expertise from the humanities and sciences “tocatalyze practical, actionable approaches to publishing Linked Open Data,specifically:• Identify the tools and techniques for publishing and working with Linked Open Data.• Draft precedents and policy for licensing and copyright considerations regarding thepublishing of library, archive, and museum metadata.• Publish definitions and promote use cases that will give LAM staff the tools they needto advocate for Linked Open Data in their institutions.”Source: “About,” LODLAM (2012) Retrieved April 20, 2012 http://lod-lam.net/summit/about/The LOD/LAMIntiative
  4. 4. Data for Libraries Archivesand Museum grew over1000% in 2010
  5. 5. Linked Open Data Principles1. Use URIs as names for thingshttp://en.wikipedia.org/wiki/File:URI_Euler_Diagram_no_lone_URIs.svg
  6. 6. Linked Open Data Principles2. Use HTTP URIs so that people can look up thosenameshttp://en.wikipedia.org/wiki/File:URI_Euler_Diagram_no_lone_URIs.svg
  7. 7. Linked Open Data Principles3. When someone looks up a URI, provide usefulinformation using standards (RDF, SPARQL)
  8. 8. Linked Open Data Principles4. Include links to other URIs so that others can discovermore thingsImage Source: http://en.wikipedia.org/wiki/File:Linking-Open-Data-class-diagram_2008-10-05.png
  9. 9. RDF TriplesSubject ObjectPredicateKnows
  10. 10. RDF TriplesSubject ObjectPredicateKnowshttp://futurama.com/reaccuringcharacters/robot-devilhttp://xmlns.com/foaf/0.1/knowshttp://futurama.com/maincharacters/phillip-j-fry
  11. 11. OntologiesFOAF (Friend of a Friend) – Definespersonal relationshipsGeonames – defines names of placesSKOS - defines various taxonomies
  12. 12. Query Languages:SPARQLPREFIX abc: <http://xmlns.com/futuramauniverse/1.01>SELECT ?capital ?countryWHERE {?x abc:statename ?capital ;abc:isCapitalOf ?y .?y abc:planetname ?planet ;abc:isOnPlanet abc:OmicronPersei8
  13. 13. Questions