The site presents a hierarchical organization for Wikipedia articles with respect to their semantic similarity and provides search and navigation facilities over the hierarchy. The hierarchy is constructed as a recursive division of the English Wikipedia graph into dense subgraphs (graph communities) and can be considered as an extension to the Wikipedia category structure. Unlike Wikipedia categories that are primarily authored by humans, the community hierarchy is fully automatic, purely link-based and reflects the global link structure of Wikipedia.
C. Buckley, and E. Voorhees. Proceedings of the 27th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2004), page 25--32. Sheffield, United Kingdom, ACM, (July 2004)
Y. Huang, V. Tresp, M. Bundschus, A. Rettinger, and H. Kriegel. Proceedings of the 20th International Conference on Inductive Logic Programming (ILP 2010), volume 6489 of Lecture Notes in Computer Science, page 92--104. Firenze, Italy, Springer Verlag, (2010)
T. Hara, M. Ito, and S. Nishio. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 817-826. New York, NY, USA, ACM, (2008)
Q. Lu, and L. Getoor. Proceedings of the 20th International Conference on Machine Learning (ICML 2003), August 21-24, 2003, Washington, DC, USA, page 496--503. AAAI Press, Chicago, IL, USA, (2003)
O. Udrea, L. Getoor, and R. Miller. Proceedings of ACM-SIGMOD 2007 International Conference on Management of Data, June 11-14, 2007, Beijing, China, page 449--460. ACM Press, New York, NY, USA, (2007)