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

2. Ralph LeVan – ALAO TEDSIG – 5/27/20112 Brief Overview of Linked (Open) Data Its about the Links Its about the Openness Its about the Data And there are some infrastructure requirements too

3. Ralph LeVan – ALAO TEDSIG – 5/27/20113 Its 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. Ralph LeVan – ALAO TEDSIG – 5/27/20114 Its about the Openness What sort of license is the data available in?

5. Ralph LeVan – ALAO TEDSIG – 5/27/20115 Its about the Data <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"/> Mozziconacci, Jean-Franc ̧ ois

6. Ralph LeVan – ALAO TEDSIG – 5/27/20116 infrastructure Real World Objects 303 (See Other) redirects to Generic Objects Content negotiation from Generic Objects RDF available

7. Ralph LeVan – ALAO TEDSIG – 5/27/20117 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. Ralph LeVan – ALAO TEDSIG – 5/27/20118 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. Ralph LeVan – ALAO TEDSIG – 5/27/20119 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. Ralph LeVan – ALAO TEDSIG – 5/27/201110 Elegant (but incomplete) Data <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"/> Mozziconacci, Jean-Franc ̧ ois

11. Ralph LeVan – ALAO TEDSIG – 5/27/201111 Mozziconacci, Jean-Franc ̧ ois

12. Ralph LeVan – ALAO TEDSIG – 5/27/201112 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. Ralph LeVan – ALAO TEDSIG – 5/27/201113 But, a work in progress No RDF (but existing SKOS shows it wont be hard) Camped on the tspilot.oclc.org domain

14. Ralph LeVan – ALAO TEDSIG – 5/27/201114 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. Ralph LeVan – ALAO TEDSIG – 5/27/201115 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 activitiesfocusing on Linked Datain the library community and beyond http://www.w3.org/2005/Incubator/lld/

16. Ralph LeVan – ALAO TEDSIG – 5/27/201116 Open Source Infrastructure Our VIAF interface technology is available as Open Source at http://code.google.com/p/oclcsrw/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. Ralph LeVan – ALAO TEDSIG – 5/27/201117 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. Ralph LeVan – ALAO TEDSIG – 5/27/201118 Poised for success OCLC has the data, the infrastructure and the knowledge to participate in the Linked Data world.