DBpedia Blog

DBpedia 3.5.1 released


Hi all,

we are happy to announce the release of DBpedia 3.5.1.

This is primarily a bugfix release, which is based on Wikipedia dumps dating from March 2010. Thanks to the great community feedback about the previous DBpedia release, we were able to resolve the reported issues as well as to improve template to ontology mappings.

The new release provides the following improvements and changes compared to the DBpedia 3.5 release:

  1. Some abstracts contained unwanted WikiText markup. The detection of infoboxes and tables has been improved, so that even most pages with syntax errors have clean abstracts now.
  2. In 3.5 there has been an issue detecting interlanguage links, which led to some non-english statements having the wrong subject. This has been fixed.
  3. Image references to dummy images (e.g. http://en.wikipedia.org/wiki/Image:Replace_this_image.svg) have been removed.
  4. DBpedia 3.5.1 uses a stricter IRI validation now. Care has been taken to only discard URIs from Wikipedia, which are clearly invalid.
  5. Recognition of disambiguation pages has been improved, increasing the size from 247,000 to 769,000 triples.
  6. More geographic coordinates are extracted now, increasing its number from 1,200,000 to 1,500,000 in the english version.
  7. For this release, all Freebase links have been regenerated from the most recent freebase dump.

You can download the new DBpedia dataset from http://wiki.dbpedia.org/Downloads351. As usual, the data set is also available as Linked Data and via the DBpedia SPARQL endpoint.

Lots of thanks to:

  • Jens Lehmann and Sören Auer (both Universität Leipzig) for providing the knowledge base via the DBpedia download server at Universität Leipzig.
  • Kingsley Idehen and Mitko Iliev (both OpenLink Software) for loading the knowledge base into the Virtuoso instance that serves the Linked Data view and SPARQL endpoint.

The whole DBpedia team is very thankful to three companies which enabled us to do all this by supporting and sponsoring the DBpedia project:

  • Neofonie GmbH (http://www.neofonie.de), a Berlin-based company offering leading technologies in the area of Web search, social media and mobile applications.
  • Vulcan Inc. as part of its Project Halo (http://www.projecthalo.com). Vulcan Inc. creates and advances a variety of world-class endeavors and high impact initiatives that change and improve the way we live, learn, do business (http://www.vulcan.com).
  • OpenLink Software (http://www.openlinksw.com). OpenLink Software develops the Virtuoso Universal Server, an innovative enterprise grade server that cost-effectively delivers an unrivaled platform for Data Access, Integration and Management.

More information about DBpedia is found at http://dbpedia.org/About

Have fun with the new DBpedia knowledge base!


Robert Isele and Anja Jentzsch