Linked Open Data for the Cultural Sector
- 1. Cultural Linked Open Data 2014-02-06 Lars Marius Garshol, larsga@bouvet.no, http://twitter.com/larsga 1
- 2. The importance of data • Most web sites are data-driven – if you have the data, you can add functionality – if you don’t have the data, you’re stuck • Example: Google Maps – imagine you have the application, the server farm, the scaling and monitoring, etc – but you don’t have the actual map data – not only are you stuck, but creating the data is much harder than making the service 2
- 3. 3
- 4. 4 Research project by SINTEF and Computas
- 5. Data sources Research project by SINTEF and Computas 5
- 6. Must be at meeting at 1345. Three transport alternatives. 6 Research project by SINTEF and Computas
- 7. Data is raw material for building services! 7
- 8. Possible users of cultural data • Any kind of web store – publishers – streaming services – ... • Travel businesses – public sector, hotels, tour organizers, event organizers, ... • Media – newspapers, broadcasting, ... • Lots of public sector uses – education, ... • Many things none of us can’t imagine now 8
- 9. 9
- 10. Only linked data is usable NRK/Skole Cappelen Damm 10
- 11. Linked Open Data • Movement to publish open data online – in machine-readable form – linked to other data sets • Based on some key technologies – URLs for identifiers – RDF for data • Gaining a lot of traction in the cultural sector – – – – 11 BBC Europeana Smithsonian Institution ...
- 12. The technology • Provides simple data representation – – – – graph model (RDF) has ready-made formats (XML, text, JSON, ...) standard query language (SPARQL) lots of RDF databases available • Allows anyone to refer to anything – a museum can say explicitly that one object in their collection has a specific relation to an object in another collection – liberation from the ID scheme confusion • Can reuse terminology from other authorities – can also easily extend that terminology 12
- 14. 14
- 15. http://dbpedia.org/resource/Knut_Faldbakken • Globally unique – across all systems and organizations • Distributed – if you have a domain, you can make URIs • Self-documenting – just follow the link to find documentation • Can be used anywhere – anyone can point at anything
- 16. Today • • • • Flat, unlinked data No navigation No connections Poor characterization – doesn’t say what it is 16
- 17. Europeana Data Model As linked data edm:ProvidedCHO nv:Photograph rdf:type dc:title dc:date “Bergliot Ibsen” 1903 dc:subject foaf:Person rdfs:label “Bergliot Ibsen” dbp:died 1953-02-02 dbp:born 1869-06-10 nv:provider http://dbpedia.org/resource/Bergliot_Ibsen rdfs:label grs:point 17 “Aulestad” 61.2173 10.265952 http://dbpedia.org/resource/Aulestad
- 18. Choice of tools Modelling pellet Reasoners Redland RDF Libraries APIs Triple stores
- 19. Great, but how can we actually link the data? 19
- 20. 20
- 21. “Do they have Knut Faldbakken in here?” 21 http://data.deichman.no/sparql
- 22. Yes, but not connected to anything ... ...can we do anything about that? 22
- 23. Record linkage to the rescue • Active research field – dating back to the 1940s • Can connect data without common IDs – measure similarity instead • Tools exist, with – – – – value cleaning statistical analysis sophisticated comparators fast search backends • One example is Duke – http://code.google.com/p/duke/ – Java and open source 23
- 24. Connect to DBpedia http://data.deichman.no/...dbakken_Knut_1941- http://dbpedia.org/resource/Knut_Faldbakken NAME: LIFESPAN: NATIONALITY: n NAME: BIRTHDATE: Faldbakken, Knut 1941- Knut Faldbakken 1941-08-31 Complete recipe here 24 http://code.google.com/p/duke/wiki/DeichmanLink
- 25. Training with genetic algorithm 25 http://www.garshol.priv.no/blog/262.html
- 26. Conclusion • Linked Open Data has tremendous potential – vastly easier reuse of data – hugely empowering for consumers – also opens new possibilities for data owners • Growing use in cultural sector – both internationally and in Norway • To learn more – http://www.slideshare.net/larsga/linked-opendata-14964163 – http://data.norge.no/veiledning – http://linkeddatabook.com/editions/1.0/ 26