MOAT Server

MOAT Server is a application that serves tag meanings (in HTML, JSON or RDF/XML, using content negociation) for any Tag you request. The server is shipped without any data, which means that users have first to define meanings for their tags (thanks to the clients they use, that will then update the server information) to efficiently use it, using data available on the Semantic Web, especially from the Linked Data initiative.

Example:

• http://tags.moat-project.org/tag/paris (Tag URI - content-negociated)
• http://tags.moat-project.org/tag/paris/html (HTML description of meanings)
• http://tags.moat-project.org/tag/paris/rdf (RDF/XML description of meanings)
• http://tags.moat-project.org/tag/paris/json (JSON description of meanings)
• http://tags.moat-project.org/tag/paris/json/light (same, without the foaf:maker)

In order to upload new meanings to a server, you should send the URL of an RDF file containing a list of meanings for a given tag, eg: http://apassant.net/drupal/drupal-5.5/?q=moat/tag/paris with the following API call:

• http://tag_server_base/?import=url

Some server could require a key to let you upload files, in that case, the API call is

• http://tag_server_base/?import=url&key=key_value

• MOAT demo server (ARC2-based)
  • http://tags.moat-project.org/
  • key: tagging

The server can be plugged on the top of any RDF store that support the SPARQL query language, and a way to add triples (either via a specific API or using SPARUL LOAD instruction), thanks to a “Connector” class. In order to be easily deployed, MOAT server is currently shipped with connectors for ARC2 and for the 3Store API.

Latest version of the server can be downloaded here (2008-01-21)

• By Alexandre Passant
• © 2008 Electricité de France - Released under “Modified” BSD licence

• 2008-01-21
  • Optional 'key' parameter to restict import of new meaning files

• 2008-01-19
  • Initial release

* Chek if the uploaded files are valid:

• valid RDF (RDF/XML only supported ?)
• respect ontology definition
• do not import useless data