RDF

The RDF SPARQL Endpoint module indexes the RDF data publicly available on a Drupal site into an ARC2 RDF store. It also provides a SPARQL endpoint via the ARC2 SPARQL interface.

Because it relies on the ARC2 library, this module requires MySQL and will not work on other databases. The SPARQL module should be used instead if another database support is required.

RDF SPARQL Endpoint requires the modules:
* RDF - http://drupal.org/project/rdf (with the ARC2 library installed)
* (recommended) RDF CCK - http://drupal.org/project/rdfcck

You need to make sure the RDF data is publicly available at node/*/rdf (check the permission 'access RDF data' for anonymous user).

Why another SPARQL module?
The original SPARQL module intends to work in pair with the RDF module for Drupal, and will support any database backend. However its SPARQL support is not as mature as the SPARQL support of the ARC2 library. The downside of ARC2 is that it is MySQL specific (for now at least).

The RDF SPARQL Proxy module allows to instantiate RDF resources on demand (lazy loading) via SPARQL CONSTRUCT queries. Site administrators can define profiles which specify the mapping rules of the remote data schema to the local Drupal RDF schema defined by the RDF API and RDF CCK. When visiting a node, it is synchronized with the RDF endpoint where the data originates from. Although this module can also act as an import module, it performs more than a regular import as it is able to keep track of the source of the data. An example use case is the ability to instantiate lists of publications from the DBLP SPARQL endpoint.

By leveraging the capabilities of RDF, this module will be able to instantiate complex structured data (graph) allowing for mass import of heterogeneous instances and their relationship. One query could instantiate all the pubs located in Paris with their address, picture, beers available, owner; this would create a node for each pub and each owner, and link the relevant pub nodes to their owner nodes via CCK Node references.

structOntology is a module for defining and managing the ontologies used by the conStruct RDF structured content system.

conStruct is a middleware layer that allows structured data (RDF) and associated vocabularies (ontologies) to "drive" tailored tools and data displays within Drupal. The basic conStruct module provides CRUD (create - read - update - delete), search, browse and some import and export capabilities for structured datasets.

This is a project specifically created for the Google Summer of Code 2009 project Adding RDF Support to the ApacheSolr module (q.v. for more informations; maybe also interesting: this discussion which first introduced the idea).

Its purpose is to allow the Apache Solr Search Integration module to handle arbitrary RDF data. More details will follow once the way to do this has been fleshed out.

What's going on in Dover?

OpenDover is a sophisticated webservice that allows for next-gen semantic features within your blog, content management system, website or application. With the OpenDover service you can emotion-tag texts, comments, or anything else you like within your website.

For example you can send a product review to the OpenDover service and OpenDover will tag the article based on the sentiment words in the review. Based on the returned results you can mark the review as positive or negative.

OpenDover uses linguistic algorithmic technologies to emotion tag text that you send to the service. Emotion tags are returned to users for implementing in web applications, searches, blogs and so on.

Open Dover for Businesses

OpenDover can mean a lot for your online business. Enabling full semantic tagging for your content enables you to add strategic value to your website and online strategy.

OpenDover for Developers

Whether you are into blogging or developing websites, OpenDover is based on Java technology, which allows for easy connectivity through webservices.

OpenDover for Drupal

The OpenDover Drupal module is built for version 6 of the Drupal Content Management System. This module will only work on websites based on the Drupal 6 Content Management System.