Drupal.

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1 Drupal 7 and RDF Stéphane Corlosquet, <[email protected]> - Software engineer, MGH - Drupal 7 core RDF maintainer - SemWeb geek Linked Data Ventures, MIT, Oct 2010 This work is licensed under a Creative Commons Attribution 3.0 License, with attribution to Stéphane Corlosquet Slides:

2 Drupal Dries Buytaert - small news site in 2000 Open Source Content Management System LAMP stack Non-developers can build sites and publish content Control panels instead of code

3 Drupal Open & modular architecture Extensible by modules Standards-based Low resource hosting Scalable

4 Building a Drupal site

5 Building a Drupal site

6 Building a Drupal site Create the content types you need: Blog, article, wiki, forum, polls, image, video, podcast, ecommerce... (be creative)

7 Building a Drupal site Enable the features you want: Comments, tags, voting/rating, location, translations, revisions, search...

8 Building a Drupal site Place links in the navigation bars and blocks Build Views over your data Skin your site: theming

9 Building a Drupal site 6000 free contributed modules Google Analytics Wysiwyg Captcha Calendar XML sitemap Five stars Twitter...

10 Drupal inside Database storage (PDO) Cron Queue / batch API File management User management Form API Security

11 User experience

12 The Drupal Community

13 The Drupal Community It s really the Drupal community and not so much the software that makes the Drupal project what it is. So fostering the Drupal community is actually more important than just managing the code base. Dries Buytaert

14 200+ Local user groups including

15 Doubles in size each release source: source:

16 Doubles in size each release Drupal 6 (stable) - 325,145+ sites Drupal 7 (beta 1) - Total estimation 500,000 sites (1% of the Web) 20,000+ sites

17 Who uses Drupal?

18 Who uses Drupal?

19 Who uses Drupal?

20 Who uses Drupal?

21 Try Drupal 7 Download and Install Drupal 7 Grab latest release Mac OS: MAMP Acquia Stack Drupal Gardens: free Drupal 7 site

22 Drupal 7 and RDF

23 History of RDF in Drupal rdf.php (2000, Dries) FOAF, vcard (2004, walkah) Relationship (2005, dman) Semantic Search (2006, hendler) RDF (2007, Arto) OpenCalais (febbraro, 2008) RDF CCK (2008, scor) and more...

24 Experiment prior Drupal 7 Expose Drupal's data in RDF Automatically No RDF expertise required Module based

25 Architecture User driven data model Content type = RDF class Field = RDF property Node = RDF resource

26 Content types and Fields

27 Content types and Fields

28 Node

29 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.

30 Mapping to RDF

31 Mapping to RDF

32 Experiment continued 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)

33 Drupal 7 and RDF Drupal 7 core is RDFa enabled! RDFa output by default on blogs, forums, comments, etc. using FOAF, SIOC, DC, SKOS Beta1 released a few days ago

34 Drupal 7 and RDF

35 Drupal 7 contributed modules Import vocabularies Interface for mappings SPARQL endpoint on Drupal data PHP ARC2 library

36 RDFDB: an RDF Database API Access RDF stores via a consistent API SPARQL 1.1 Vendor agnostic Similar to Drupal 7 Database abstraction layer rdfdb_insert_data($graph, $triples)->execute(); rdfdb_select('?g?s?p?o')->where('graph?g {? s?p?o. }')->limit(1000)->execute();

37 RDFDB: an RDF Database API Similar to Drupal 7 Database abstraction layer rdfdb_insert_data($graph, $triples)->execute(); rdfdb_select('?s?p?o')->where('?s?p?o')>limit(10)->execute(); rdfdb_clear($graph)->execute() Do not worry about what RDF store the SPARQL endpoint is running on

38 RDFDB: an RDF Database API Connection info: Support for master/slave servers Drivers for ARC2, Virtuoso, 4store Comes with tests!

39 RDFDB: an RDF Database API Why an abstraction layer? Every store has its own way to implement SPARQL updates, some are RESTful, some others have their own SPARQL update syntax. ARC2: SPARQL+ via POST requests 4store: POST, PUT and DELETE requests Download

40 How to get involved So many ways... code, documentation, support, translations, graphic design Watch video

41 How to get involved Subscribe to the Semantic Web group at Semantic Drupal news at

42 Questions? Good luck!