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Linked Data Activities at OCLC

Linked Data Activities at OCLC. Ralph LeVan Senior Research Scientist OCLC Research. Brief Overview of Linked (Open) Data. It’s about the Links It’s about the Openness It’s about the Data And there are some infrastructure requirements too. It’s about the Links. Books

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Linked Data Activities at OCLC

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  1. Linked Data Activities at OCLC Ralph LeVan Senior Research Scientist OCLC Research

  2. Brief Overview of Linked (Open) Data • It’s about the Links • It’s about the Openness • It’s about the Data • And there are some infrastructure requirements too

  3. It’s about the Links Books • http://worldcat.org/oclc/123456 Classification numbers • http://dewey.info/class/641/about People • http://viaf.org/viaf/12345679 Subject headings • http://tspilot.oclc.org/fast/fst01234567

  4. It’s about the Openness • What sort of license is the data available in?

  5. It’s about the Data <rdf:RDF> <rdf:Description rdf:about="http://viaf.org/viaf/12345679"> <rdf:type rdf:resource= "http://xmlns.com/foaf/0.1/Person"/> <rdf:type rdf:resource= "http://RDVocab.info/uri/schema/FRBRentitiesRDA/Person"/> <foaf:name>Mozziconacci, Jean-François</foaf:name> </rdf:Description>

  6. infrastructure • Real World Objects • 303 (See Other) redirects to Generic Objects • Content negotiation from Generic Objects • RDF available

  7. Dewey It should be simple: http://dewey.info/class/641/ Browsers get redirected to: http://dewey.info/class/641/about RDF clients get redirected to: http://dewey.info/class/641/about.rdf

  8. But the DDC has a long complex history What language did you want? http://dewey.info/class/641/about.en http://dewey.info/class/641/about.fr What edition did you want? http://dewey.info/class/641/e22/about http://dewey.info/class/641/e23/about In what language? http://dewey.info/class/641/e22/about.en In what format? http://dewey.info/class/641/e22/about.en.html http://dewey.info/class/641/e22/about.en.rdf

  9. Virtual International Authority File: VIAF It is blissfully simple compared to Dewey! http://viaf.org/viaf/12345679 Generates a 303 redirect to: http://viaf.org/viaf/12345679/ Where content negotiation will get you either: http://viaf.org/viaf/12345679/viaf.html http://viaf.org/viaf/12345679/viaf.xml http://viaf.org/viaf/12345679/viaf.rss http://viaf.org/viaf/12345679/viaf.rdf http://viaf.org/viaf/12345679/marc21.xml http://viaf.org/viaf/12345679/unimarc.xml

  10. Elegant (but incomplete) Data <rdf:RDF> <rdf:Description rdf:about="http://viaf.org/viaf/12345679"> <rdf:type rdf:resource= "http://xmlns.com/foaf/0.1/Person"/> <rdf:type rdf:resource= "http://RDVocab.info/uri/schema/FRBRentitiesRDA/Person"/> <foaf:name>Mozziconacci, Jean-François</foaf:name> </rdf:Description>

  11. <skos:Concept rdf:about="http://viaf.org/viaf/ sourceID/BNF%7C12153518#skos:Concept"> <skos:inScheme rdf:resource="http://viaf.org/ authorityScheme/BNF"/> <skos:prefLabel>Mozziconacci, Jean-François </skos:prefLabel> <foaf:focus rdf:resource="http://viaf.org/viaf/12345679"/> </skos:Concept>

  12. FAST — Faceted Application of Subject Terminology, subject headings Another elegant URI pattern http://tspilot.oclc.org/fast/fst01234567 http://tspilot.oclc.org/fast/fst01234567.json http://tspilot.oclc.org/fast/fst01234567.mads http://tspilot.oclc.org/fast/fst01234567.marcxml http://tspilot.oclc.org/fast/fst01234567.skos http://tspilot.oclc.org/fast/fst01234567.zthes

  13. But, a work in progress • No RDF (but existing SKOS shows it won’t be hard) • Camped on the tspilot.oclc.org domain

  14. Not WorldCat Identities http://worldcat.org/identities/lccn-n79-91588 Why not? Limited product development resources No customer demand What do you mean no customer demand?!?! Our library customers prefer MARC or simple XML instead of RDF The potential consumers who want Identities as linked data expect to get it for free

  15. W3C Library Linked Data Incubator Group • Andy Houghton • Tod Matola • Michael Panzer • Jeff Young The mission of the group is to help increase global interoperability of library data on the Web, by bringing together people involved in Semantic Web activities—focusing on Linked Data—in the library community and beyond http://www.w3.org/2005/Incubator/lld/

  16. Open Source Infrastructure Our VIAF interface technology is available as Open Source at http://code.google.com/p/oclcsrw/ It provides the ability to expose records stored in Lucene (or a similar database) as Linked Data Other technologies (such as D2R) are available for data in relational databases

  17. Turning Content into Links If Linked Data is about links, then how do you turn your content into links? Google Refine and the ReconciliationServiceAPI Refine takes spreadsheets of data and supplements that data with links It uses the ReconciliationServiceAPI to query a database and get back links Think of OpenURL for the Linked Data world

  18. Poised for success OCLC has the data, the infrastructure and the knowledge to participate in the Linked Data world.

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