eprintid: 1097
rev_number: 7
eprint_status: archive
userid: 6
dir: disk0/00/00/10/97
datestamp: 2012-02-01 11:47:12
lastmod: 2012-02-01 11:47:52
status_changed: 2012-02-01 11:47:12
type: article
metadata_visibility: show
creators_name: Capocci, Andrea
creators_name: Rao, Francesco
creators_name: Caldarelli, Guido
creators_id: 
creators_id: 
creators_id: guido.caldarelli@imtlucca.it
title: Taxonomy and clustering in collaborative systems: the case of the on-line encyclopedia Wikipedia
ispublished: pub
subjects: HA
subjects: QC
divisions: EIC
full_text_status: none
keywords: PACS: 89.75.Hc Networks and genealogical trees; 89.75.Fb Structures and organization in complex systems; 89.75.-k Complex systems
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.
date: 2008-01
date_type: published
publication: EPL (Europhysics Letters)
volume: 81
number: 2
publisher: IOPscience
pagerange: 28006
id_number: 10.1209/0295-5075/81/28006
refereed: TRUE
issn: 0295-5075      
official_url: http://dx.doi.org/10.1209/0295-5075/81/28006
citation:   Capocci, Andrea and Rao, Francesco and Caldarelli, Guido  Taxonomy and clustering in collaborative systems: the case of the on-line encyclopedia Wikipedia.  EPL (Europhysics Letters), 81 (2).  p. 28006.  ISSN 0295-5075       (2008)