The document discusses the European ALIADA project and linked open data. It defines semantic web and linked open data as structured data expressed as statements using URIs. It outlines the advantages of linked open data such as being machine readable and enabling connections between data. Finally, it discusses publishing linked open data, including using appropriate vocabularies and registering datasets.

1. The European ALIADA project :
introduction
Ádám Horváth
Museum of Fine Arts, Budapest
33rd ADLUG ANNUAL MEETING
Piazza Armerina, 24 – 26 September 2014

2. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 2
Contents
http://aliada-project.eu
• What is semantic web
• Linked Open Data advantages
• Usage of semantic web
• Published datasets
• Publishing data in the LOD cloud

3. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 3
What is semantic web (Linked Open Data (LOD))
http://aliada-project.eu
• Series of RDF statements
– Subject predicate object
– The statement is based on URI-s
– Example
• Decameron was created by Boccaccio
• http://nektar.oszk.hu/data/manifestation/2804140
(Decameron)
• http://purl.org/dc/terms/creator (was created by )
• http://viaf.org/viaf/64002165 (Boccaccio)

4. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 4
Storing Linked Open Data
http://aliada-project.eu
• RDF store
• SPARQL endpoint

5. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 5
Expressing predicates
http://aliada-project.eu
• Predicates come for vocabularies
– FRBRoo
– FRBRer
– RDFDC
– ISBD
– Etc.

6. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 6
Linked Open Data advantages
http://aliada-project.eu
• The linked data is built on the current
Internet architecture
• It is machine readable
• The data can be easily connected
• Represents data and not just text

7. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 7
RDF example
http://aliada-project.eu

8. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 8
RDF example
http://aliada-project.eu

9. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 9
Linked Open Data advantages
http://aliada-project.eu
• The RDF is not domain specific. It is a
worldwide API to data
– Galleries, libraries, archives and museums
(GLAM) can step outside of their domain,
their data can interact with the data of
other domains

10. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 10
Usage of Linked Open Data
http://aliada-project.eu
• Smart search
• Data enrichment
• Solving problems more easily
• Expressing difficult relationships
• Standards based on linked data

11. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 11
Linked Open Data are spreading
http://aliada-project.eu
• Datasets in the LOD cloude
– Union Catalog of Sweden (LIBRIS)
– National Library of Hungary
– Biblioteca Nacional de España
– Yale Centre of British Art
– Italian museums
– British Museum
– Europeana (EDM)

12. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 12
Linked Open Data are spreading
http://aliada-project.eu
• Datasets in the LOD cloude
– Union Catalog of Sweden (LIBRIS)
– National Library of Hungary
– Biblioteca Nacional de España
– Yale Centre of British Art
– Italian museums
– British Museum
– Europeana (EDM)

13. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 13
Linked Open Data are spreading
http://aliada-project.eu
• Datasets in the LOD cloude
– Union Catalog of Sweden (LIBRIS)
– National Library of Hungary
– Biblioteca Nacional de España
– Yale Centre of British Art
– Italian museums
– British Museum
– Europeana (EDM)

14. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 14
Publishing linked data
http://aliada-project.eu
• It is easy because GLAM institutions
have detailed metadata

15. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 15
Publishing linked data
http://aliada-project.eu
• You have to be aware of the following
– RDF
– RDF representations (XML, Turtle, Json, etc)
– URI, IRI and their character encoding
– URI syntax
– Internet name resolution architecture
– HTTP communication
• Content negotiation, Web servers rewriting rules

16. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 16
Publishing linked data
http://aliada-project.eu
• You have to be aware of the following (cont)
– Vocabularies
• FRBRer
• CIDOC-CRM
• FRBRoo
• RDFDC
• RDA
• ISBD
• SKOS
• BIBO

17. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 17
Publishing linked data
http://aliada-project.eu
• You have to be aware of the following (cont)
– Vocabularies (cont)
• OAI-ORE
• MODS
• BIBFRAM
• FOAF
• XMP
• UdcSummary
• ….

18. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 18
Publishing linked data
http://aliada-project.eu
• You have to be aware of the following (cont)
– RDF stores
• Jena, Virtuoso
– SPARQL endpoints
• Fuseki
– How to register your dataset
– LOD email lists
– Data conversion

19. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 19
Publishing linked data
http://aliada-project.eu
• You have to be aware of the following (cont)
– Open data initiative
– Open data licencing methods
– …..

20. © 2014 Aliada ConsortiumArt Libraries Facing the Challenges of a Digital AgeÁdám Horváth – HNM / MFAB 20
http://aliada-project.eu
@aliadaproject