During the summer we have worked on Wikihadoop [0], a tool that allows us to create the diffs between two revisions of a Wiki article using Hadoop.

Now I am happy to announce that the entire diffdb is available for download at http://http://dumps.wikimedia.org/other/diffdb/

This dataset is based on the English Wikipedia April 2011 XML dump files. The advantage of this dataset is that:

a) You can search for specific content being added / removed

b) Measure more accurately how much text an editor has added or removed

We are currently working on a Lucene-based application [1] that will allow us to quickly search for specific strings being added or removed.

If you have any questions, then please let me know!

[0] https://github.com/whym/wikihadoop

[1] https://github.com/whym/diffindexer

Best regards,

Diederik van Liere