Taxonomy and clustering in collaborative systems: The case of the on-line encyclopedia Wikipedia

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Taxonomy and clustering in collaborative systems: The case of the on-line encyclopedia Wikipedia is a 2008 publication written in English by A. Capocci, F. Rao, G. Caldarelli and published in EPL (Europhysics Letters).

[edit] Abstract

In this paper we investigate the nature and structure of the relation between imposed classifications and real clustering in a particular case of a scale-free network given by the on-line encyclopedia Wikipedia. We find a statistical similarity in the distributions of community sizes both by using the top-down approach of the categories division present in the archive and in the bottom-up procedure of community detection given by an algorithm based on the spectral properties of the graph. Regardless of the statistically similar behaviour, the two methods provide a rather different division of the articles, thereby signaling that the nature and presence of power laws is a general feature for these systems and cannot be used as a benchmark to evaluate the suitability of a clustering method.

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