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Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
Drupal and RDF
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Drupal and RDF

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Presentation I gave at RPI on Feb 16th, 2010

Presentation I gave at RPI on Feb 16th, 2010

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  • 1. Drupal and RDF Stéphane Corlosquet, <scorlosquet@gmail.com> - Software engineer, MGH - Drupal developer - SemWeb geek This work is licensed under a Creative Commons Attribution 3.0 License, with attribution to Stéphane Corlosquet
  • 2. Drupal ● Small news site in 2000 ● Open Source - 2001 ● Content Management System ● LAMP stack ● Non-developers can build sites and publish content ● Control panels instead of code http://www.flickr.com/photos/funkyah/2400889778
  • 3. Drupal ● Open & modular architecture ● Extensible by modules ● Standards-based ● Low resource hosting ● Scalable
  • 4. Drupal ● Create the content types you need: Blog, article, wiki, forum, polls, image, video, podcast, e- commerce... (be creative) http://www.flickr.com/photos/grdloizaga/81742518
  • 5. Drupal ● Enable the features you want: Comments, tags, voting/rating, location, translations, revisions, search... (from the 3000+ modules contributed by the community) http://www.flickr.com/photos/grdloizaga/81742518
  • 6. Drupal ● Place links in the navigation bars and blocks ● Build Views over your data http://www.flickr.com/photos/grdloizaga/81742518
  • 7. Who uses Drupal?
  • 8. Who uses Drupal?
  • 9. Who uses Drupal?
  • 10. Who uses Drupal? http://buytaert.net/tag/drupal-sites
  • 11. ● 227,000 sites running Drupal ● How to leverage all this data? ● <insert RDF sales pitch here> http://www.flickr.com/photos/bitzcelt/450640323/
  • 12. Experiment in Drupal 6 ● Expose Drupal's data in RDF ● Automatically ● No RDF expertise required ● Module based ● 100% PHP based http://www.flickr.com/photos/neys/238686518 7
  • 13. Architecture ● User driven data model ● Content type = RDF class ● Field = RDF property ● Node = RDF resource http://www.flickr.com/photos/docman/221656821
  • 14. Content types and Fields
  • 15. Content types and Fields
  • 16. Node
  • 17. Goals ● Re-use of published ontology terms – local schema can be mapped to vocabularies like DC, FOAF, SIOC, etc. ● Expressing internal Drupal constraints in OWL – such as required fields and cardinalities ● Auto-generate terms where necessary – when a content type or field cannot be mapped to an external term ● Safe vocabulary re-use – to prevent inconsistencies on the Web of Data
  • 18. Mapping to RDF ● site:Person a rdfs:Class; rdfs:subClassOf foaf:Person. ● site:first_name a rdf:Property; rdfs:subPropertyOf foaf:firstName. ● site:colleague rdfs:domain site:Person.
  • 19. Mapping to RDF
  • 20. Mapping to RDF
  • 21. Modules for Drupal 6 ● 1. Automatic site vocabulary generation ● 2. Mapping Content Models to existing ontologies ● 3. Data endpoint for SPARQL querying ● 4. Lazy loading of external data (data import)
  • 22. Linked Data sites eco-system
  • 23. Preparing for RDF in Drupal 7 ● March 2008: first draft for schema http://groups.drupal.org/node/9311
  • 24. Preparing for RDF in Drupal 7 ● August 2008 Szeged conference: early RDF CCK http://szeged2008.drupalcon.org/program/sessions/drupal-and-semantic-web-neologism-project
  • 25. Preparing for RDF in Drupal 7 ● March 2009 DC conference: video on RDFa in Drupal http://www.youtube.com/watch?v=r4WgTRIRoa0
  • 26. Preparing for RDF in Drupal 7 ● May 2009, DERI Galway: RDF in core code sprint
  • 27. Preparing for RDF in Drupal 7 ● October 2009: main RDF patch committed http://twitter.com/Dries/status/4997311434
  • 28. Drupal 7 and RDF ● Drupal 7 core is RDFa enabled! ● RDFa output by default on blogs, forums, comments, etc. 
using FOAF, SIOC, DC, SKOS ● Alpha release available ● Sneak preview http://drupalrdf.openspring.net/
  • 29. Drupal 7 and RDF
  • 30. Drupal 7 and RDF
  • 31. Conclusion ● Drupal 7 will play a major role in exposing more RDF data on the web ● Empower users to create new types of apps ● Testing framework part of core ● http://groups.drupal.org/semantic-web ● http://openspring.net/ ● Questions?
  • 32. Open questions beyond Drupal ● How to push changes to consumers ● How to pull changes from remote datasets – deal with locally annotated resources

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