Linking Open Data
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Presentation in the context of the DPLA meeting 16th of May in Amsterdam
![Linked Open Data: Principles & 2 Projects Prof. Dr. Stefan Gradmann Humboldt-Universität zu Berlin / School of Library and Information Science [email_address]](https://image.slidesharecdn.com/20110516dplaamsterdam-110515111652-phpapp01/85/linking-open-data-1-320.jpg)
![Overview ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Linking Open Data
- 1. Linked Open Data: Principles & 2 Projects Prof. Dr. Stefan Gradmann Humboldt-Universität zu Berlin / School of Library and Information Science [email_address]
- 3. LoD & LOD2: two projects
- 4. Conclusion : on the importance of being 'open'
- 7. In scope (including re- presentations of non- information resources, 'things', 'data')
- 10. hierarchies of classes and properties,
- 11. inheritance
- 13. Extending the Web in Scope: the way it does not work! Taken from Ronald Carpentier's Blog at http://carpentier.wordpress.com/ 2007/08/08/1-2-3/ Something is wrong with this picture (but what?)
- 14. … and the way extending the Web in scope is actually done: A Web of Things
- 15. … Linked Data Copyright © 2008 W3C (MIT, ERCIM, Keio) http://www.w3.org/2008/Talks/0617-lod-tbl/#(4) Standard Identifiers Standard Pointers Standards for Queries and Statements Link to Context
- 16. A few Bubbles: 5/2007 < Over 500 million RDF triples < Around 120,000 RDF links between data sources © Richard Cyganiak
- 17. Quite some Bubbles: 9/2008 © Richard Cyganiak
- 18. Many Bubbles: 7/2009 © Richard Cyganiak < Over 13.1 billion RDF triples < Over 142 million RDF links between data sources
- 19. (Too?) Many Bubbles: 9/2010 http://richard.cyganiak.de/2007/10/lod/lod-datasets_2010-09-22_colored.html
- 21. PND and SWD (prototype)
- 22. Geonames
- 23. LCSH
- 24. …
- 26. “ The goal [...] is to build a data commons by making various open data sources available on the Web as RDF and by setting RDF links between data items from different data sources.”
- 27. First gathering in Banff at WWW2007 with pioneers such as Tom Heath , Chris Bizer , Kingsley Idehen, Yrjana Rankka, Orri Erling, Ivan Mikhailov, Danny Ayers, Steve Coast, Peter Murray Rust, Alan Ruttemberg, Ian Horrocks, Bernardo Cuenca Grau, Boris Motik, Danny Gagne.
- 28. Current discussion: how to switch from mere volume to quality ? Matching, mapping and referrals are central
- 29. Tom Heath and Christian Bizer (2011) Linked Data: Evolving the Web into a Global Data Space (1st edition). Morgan & Claypool. http://linkeddatabook.com/editions/1.0/
- 32. D2R Server (Relational to RDF)
- 33. DBPedia Extraction from Wikipedia
- 34. OntoWiki (agile, distributed knowledge engineering)
- 35. Silk Link Discovery Framework
- 40. But it gets quite expensive that way …
- 41. … much too expensive, probably, for Europeana to afford!
- 42. Or else (LD behind a proxy) it is straightaway parasitic.
- 45. No income to be generated from data access and use
- 48. -> What is the actual value of context (in business terms!)?
- 49. Thank you for your attention!
Notes de l'éditeur
- Europeana intends to connect to the Linked Open Data community. In the Linked Open Data cloud we find many more knowledge sources like Dbpedia, Geonames, or Library of Congress Subject Headings. Europeana wants to use them to further contextualize and enrich the objects in its information space. At the same time Europeana wants to make its own data available to other communities. The EDM is crucial for realizing this vision. [ LOD cloud July 2009 ]