The WISIGOTH project aims at extracting lexical semantic resources from Wiktionary, the online collaborative dictionary, and enrich them for NLP purposes.
Wiktionary is multilingual and contains, besides usual lexemes' glosses and examples, semantic relations such as synonymy/antonymy, hypernymy/hyponymy, holonymy/meronymy. However, these relations are quite rare. The Wisigoth system includes a module that computes automatically new synonyms. This computation is based on random-walks over the graphs extracted from Wiktionary. As the suggested synonyms may be relevant or irrelevant, they are to be manually validated or invalidated by contributors. We have designed a Firefox extension that anybody can install, which:

• suggests potential candidates when you browse a page of the English or French Wiktionary ;
• handles for you the edition of Wiktionary's articles if you decide to add or remove a given synonym ;
• as you may want to add a synonym not appearing in the list of the suggested synonyms, the extension includes a free text area into which you can type your own proposition.

Preview: Wisigoth's synonyms suggestion for beautiful

User Manual: see the online version of the user manual.

• CLLE-ERSS : Bruno Gaume, Franck Sajous, Yannick Chudy
• IRIT : Emmanuel Navarro
• LPL : Laurent Prévot

The "Download" link above enables you to download the WISIGOTH extension. It is intended to be used by anyone willing to contribute to the online dictionary.
Below is given a list of links to some resources that may interest more specifically the NLP community:

• XML Dumps: structured XML files extracted from 2010 dumps of the English and the French Wiktionary
• Parsers for Wiktionary's dumps (available soon)

[ BIBTEX ]

• F. Sajous, E. Navarro, B. Gaume, L. Prévot and Y. Chudy (2013). Semi-Automatic Enrichment of Crowdsourced Synonymy Networks: The WISIGOTH system applied to Wiktionary. Language Resources & Evaluation, 47(1), pp. 63-96.
  (Published online: 5 November 2011.)
• F. Sajous, E. Navarro, B. Gaume (2011). Enrichissement de lexiques sémantiques approvisionnés par les foules : le système WISIGOTH appliqué à Wiktionary. TAL, 52(1), pp 11-35.
• F. Sajous, E. Navarro, B. Gaume, L. Prévot, Y. Chudy (2010). Semi-automatic Endogenous Enrichment of Collaboratively Constructed Lexical Resources: Piggybacking onto Wiktionary. In H. Loftsson, E. Rögnvaldsson, S. Helgadóttir (Eds.) Advances in Natural Language Processing, Lecture Notes in Computer Science, vol 6233, Springer Berlin / Heidelberg, pp 332-344.
  The original publication is available at www.springerlink.com.
• E. Navarro, F. Sajous, B. Gaume, L. Prévot, S. Hsieh, I. Kuo, P. Magistry and Chu-Ren Huang (2009). Wiktionary and NLP: Improving synonymy networks. In Proceedings of the ACL Workshop on The People's Web Meets NLP: Collaboratively Constructed Semantic Resources. ACL-IJCNLP 2009, Singapore.

See the versions history, known bugs and road map on the development page.