R. Lambiotte, and M. Ausloos. Computational Science – ICCS 2006, page 1114-1117. Springer Berlin / Heidelberg, (2006)
We describe online collaborative communities by tripartite networks, the nodes being persons, items and tags. We introduce projection methods in order to uncover the structures of the networks, i.e. communities of users, genre families... The structuring of the network is visualised by using a tree representation. The notion of diversity in the system is also discussed.