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RDF and Open Linked Data, a first approach

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Introduction to semantic web and RDF

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RDF and Open Linked Data, a first approach

  1. 1. RDF and Open Linked Data, aRDF and Open Linked Data, a first approachfirst approach ADLUG Users Group MeetingADLUG Users Group Meeting TrentoTrento,, 2222--2424 September, 20September, 201010 Tiziana Possemato, @CTiziana Possemato, @Cultult Andrea GazzariniAndrea Gazzarini, @Cult, @Cult Ádám HorváthÁdám Horváth,, NSZLNSZL
  2. 2. 2 RDF and Open Linked Data, a first approach – Tiziana ContentsContents Open Linked DataOpen Linked Data ThGeniusThGenius Thesaurus management in WeCatThesaurus management in WeCat Keyword search enrichmentKeyword search enrichment
  3. 3. 3 RDF and Open Linked Data, a first approach – Tiziana Chalanges for librariesChalanges for libraries Les and les people use libraryLes and les people use library cataloguescatalogues What could be the answerWhat could be the answer – To bring the catalogue to the surface webTo bring the catalogue to the surface web • To make it searchable by GoogleTo make it searchable by Google – To provide your data where the user isTo provide your data where the user is • The user must be able to get library data inThe user must be able to get library data in social sitessocial sites • To provide your data on mobile equipmentsTo provide your data on mobile equipments
  4. 4. 4 RDF and Open Linked Data, a first approach – Tiziana Challenges for librariesChallenges for libraries New potential user: the web and theNew potential user: the web and the services on the webservices on the web – Our services must not only beOur services must not only be onon the Web,the Web, but need to bebut need to be ofof the Webthe Web – We have to publish our data on theWe have to publish our data on the semantic websemantic web – We can use semantic web technologiesWe can use semantic web technologies
  5. 5. 5 RDF and Open Linked Data, a first approach – Tiziana Some introductory notesSome introductory notes Semantic web is often calledSemantic web is often called – Linked DataLinked Data – Open Linked DataOpen Linked Data – Linked Open Data (LOD)Linked Open Data (LOD) – the web of Linked Open Datathe web of Linked Open Data
  6. 6. 6 RDF and Open Linked Data, a first approach – Tiziana Web and semantic webWeb and semantic web  Web links pagesWeb links pages  Semantic web links dataSemantic web links data  Web is like a documentWeb is like a document  Semantic web is like a databaseSemantic web is like a database – RDF is the data format of the databaseRDF is the data format of the database – This database is independent from any applicationThis database is independent from any application  Web is for human beingsWeb is for human beings  Semantic web is for machinesSemantic web is for machines
  7. 7. 7 RDF and Open Linked Data, a first approach – Tiziana Advantage of linked dataAdvantage of linked data Linked data provides a single,Linked data provides a single, standardised access mechanismstandardised access mechanism – Linked data is a single worldwide APILinked data is a single worldwide API
  8. 8. 8 RDF and Open Linked Data, a first approach – Tiziana Advantage of semantic webAdvantage of semantic web technologiestechnologies Certain tasks can be carried out easierCertain tasks can be carried out easier with semantic web technologieswith semantic web technologies – RDF database + SPARQL = very powerfulRDF database + SPARQL = very powerful search capabilitiessearch capabilities
  9. 9. 9 RDF and Open Linked Data, a first approach – Tiziana Linked data from library perspectiveLinked data from library perspective Libraries can share data in a non libraryLibraries can share data in a non library centric waycentric way Libraries can share their data in a webLibraries can share their data in a web friendly wayfriendly way Library’s data can be meaningful in aLibrary’s data can be meaningful in a new contextnew context
  10. 10. 10 RDF and Open Linked Data, a first approach – Tiziana The role of libraries in building theThe role of libraries in building the semantic websemantic web The libraries have to publish their dataThe libraries have to publish their data on the semantic webon the semantic web Software developers have to developSoftware developers have to develop applications that use the (published)applications that use the (published) semantic datasemantic data Libraries can use semantic webLibraries can use semantic web technologies, applications to solvetechnologies, applications to solve certain tasks more efficientlycertain tasks more efficiently Library vendors can help on both sitesLibrary vendors can help on both sites
  11. 11. 11 RDF and Open Linked Data, a first approach – Tiziana Libraries publishing linked dataLibraries publishing linked data Entire libraryEntire library – LIBRISLIBRIS – National Széchényi Library (NSZL)National Széchényi Library (NSZL)
  12. 12. 12 RDF and Open Linked Data, a first approach – Tiziana Libraries publishing linked dataLibraries publishing linked data Authority filesAuthority files – Library of CongressLibrary of Congress • Subject Headings in SKOS formatSubject Headings in SKOS format – Deutsche NationalbibliothekDeutsche Nationalbibliothek • Name authority and subject heading authorityName authority and subject heading authority in its on formatin its on format – VIAF (Virtual International Authority File)VIAF (Virtual International Authority File) • MARC based but also publishes data in FOAFMARC based but also publishes data in FOAF formatformat • NSZL is also participating in VIAFNSZL is also participating in VIAF
  13. 13. 13 RDF and Open Linked Data, a first approach – Tiziana Libraries within W3CLibraries within W3C W3C Library Linked Data Incubator GroupW3C Library Linked Data Incubator Group – http://www.w3.org/2005/Incubator/lld/http://www.w3.org/2005/Incubator/lld/ – ChairsChairs • Tom BakerTom Baker • Emmanuelle BermesEmmanuelle Bermes • Antoine IsaacAntoine Isaac
  14. 14. 14 RDF and Open Linked Data, a first approach – Tiziana Semantic web applicationSemantic web applicationss Semantic searchSemantic search
  15. 15. 15 RDF and Open Linked Data, a first approach – Tiziana Semantic web applicatonsSemantic web applicatons
  16. 16. 17 RDF and Open Linked Data, a first approach – Tiziana Semantic web applicationsSemantic web applications works showing matching personworks showing matching person works showing locationworks showing location works showing conceptworks showing concept works titledworks titled works created fromworks created from works with matching locationworks with matching location works showing a more specific locationworks showing a more specific location
  17. 17. 18 RDF and Open Linked Data, a first approach – Tiziana VocabulariesVocabularies  Dublin Core (Dublin Core (DCDC) defines general metadata) defines general metadata attributes. See also their new domains and rangesattributes. See also their new domains and ranges draft.draft.  Friend-of-a-Friend (Friend-of-a-Friend (FOAFFOAF), vocabulary for), vocabulary for describing people.describing people.  Simple Knowledge Organization System (Simple Knowledge Organization System (SKOSSKOS),), vocabulary for representing taxonomies andvocabulary for representing taxonomies and loosely structured knowledge.loosely structured knowledge.  Bibliographic Ontology (Bibliographic Ontology (BIBOBIBO))  Expression of Core FRBR Concepts in RDFExpression of Core FRBR Concepts in RDF
  18. 18. 19 RDF and Open Linked Data, a first approach – Tiziana Linked data in ADLUG’sLinked data in ADLUG’s 2008 Venice: First steps towards2008 Venice: First steps towards publishing library data on the semanticpublishing library data on the semantic webweb 2009 Bilbao: Semantic web tutorial2009 Bilbao: Semantic web tutorial 2009 Bilbao: Using Cool URI’s as2009 Bilbao: Using Cool URI’s as permalinkpermalink ADLUG is a leader of spreading theADLUG is a leader of spreading the idea of semantic web in librariesidea of semantic web in libraries
  19. 19. adam@oszk.huadam@oszk.hu Thank you for your attentionThank you for your attention

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