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Folksonomies and clustering in the collaborative system CiteULike

Andrea Capocci et al 2008 J. Phys. A: Math. Theor. 41 224016 (7pp)   doi: 10.1088/1751-8113/41/22/224016  Help

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Andrea Capocci1 and Guido Caldarelli2
1 Dip. di Informatica e Sistemistica Università "Sapienza", via Ariosto, 25 00185 Rome, Italy
2 SMC Centre, CNR-INFM, Dip. di Fisica, Università 'Sapienza', P.le A. Moro 5, 00185-Rome, Italy

Abstract. We analyze CiteULike, an online collaborative tagging system where users bookmark and annotate scientific papers. Such a system can be naturally represented as a tri-partite graph whose nodes represent papers, users and tags connected by individual tag assignments. The semantics of tags is studied here, in order to uncover the hidden relationships between tags. We find that the clustering coefficient can be used to analyze the semantical patterns among tags.

PACS numbers: 89.75.Fb, 89.75.−k

Print publication: Issue 22 (6 June 2008)
Received 1 May 2008
Published 21 May 2008

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