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 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 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 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 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 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 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 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 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 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 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 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 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 RDF and Open Linked Data, a first approach – Tiziana
Semantic web applicationSemantic web applicationss
Semantic searchSemantic search

15. 15 RDF and Open Linked Data, a first approach – Tiziana
Semantic web applicatonsSemantic web applicatons

17. 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

18. 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

19. 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

20. adam@oszk.huadam@oszk.hu
Thank you for your attentionThank you for your attention