Advances in Information Retrieval [electronic resource] : 31th European Conference on IR Research, ECIR 2009, Toulouse, France, April 6-9, 2009. Proceedings / edited by Mohand Boughanem, Catherine Berrut, Josiane Mothe, Chantal Soule-Dupuy.

Invited Presentations -- Retrieval Model I -- Collaborative IR/Filtering -- Learning -- Multimedia - Metadata -- Expert Search - Advertising -- Retrieval Model II -- Evaluation -- Opinion Detection -- Web IR -- Representation -- Clustering / Categorization -- Distributed IR -- Short Papers -- Posters -- Workshops -- Tutorials.

This book constitutes the refereed proceedings of the 30th annual European Conference on Information Retrieval Research, ECIR 2009, held in Toulouse, France in April 2009. The 42 revised full papers and 18 revised short papers presented together with the abstracts of 3 invited lectures and 25 poster papers were carefully reviewed and selected from 188 submissions. The papers are organized in topical sections on retrieval model, collaborative IR / filtering, learning, multimedia - metadata, expert search - advertising, evaluation, opinion detection, web IR, representation, clustering / categorization as well as distributed IR.