Information Systems

Editors-in-Chief Dennis Shasha New York University, New York, NY, USA, Gottfried Vossen Westfälische Wilhelms-Universität Münster, Münster, Germany, Area Editors Sihem Amer-Yahia Yahoo! Labs - New York, New York, NY, USA, Ricardo Baeza-Yates Barcelona, Spain, Philippe Bonnet University of Copenhagen, København Ø, Denmark, Toon Calders Technische Universiteit Eindhoven, Eindhoven, Netherlands, Felipe Carino Jr. Carino Consulting, Arcadia, CA, USA, Yannis Ioannidis University of Athens, Athens, Ilisia, Greece, Bettina Kemme McGill University, Montreal, QC, QC, Canada, Flip Korn ATT Labs Research, Florham Park, NJ, USA, Nick Koudas Bell Laboratories Florham Park, Florham Park, NJ, USA, Maurizio Lenzerini Università di Roma "La Sapienza", Roma, Italy, Pericles Loucopoulos Loughborough University, Leicestershire, England, UK, Felix Naumann Hasso Plattner Institute, Potsdam, Germany, Philippe Pucheral Université de Versailles, Versailles, France, Kenneth Ross Columbia University, New York, NY, USA, Dan Suciu University of Washington, Seattle, WA, USA, Mathias Weske Universität Potsdam, Potsdam, Germany, Limsoon Wong National University of Singapore (NUS), Singapore, Singapore, Xifeng Yan University of California at Santa Barbara, Santa Barbara, CA, USA, Jan van den Bussche Universiteit Hasselt, Diepenbeek, Belgium, Editorial Advisory Board D.A. Bell University of Ulster, Coleraine, Co. Londonderry, Ireland, P.A. Bernstein Microsoft Research, Redmond, WA, USA, G. Bracchi Politecnico di Milano, Milano, Italy, M.L. Brodie Verizon Communications, Waltham, MA, USA, A.F. Cardenas University of California at Los Angeles (UCLA), Los Angeles, CA, USA, S. Ceri Politecnico di Milano, Milano, Italy, H. Chochun Peking University, Beijing, China, F. Crestani Università della Svizzera Italiana Lugano (USI), Lugano, Switzerland, M.L. Damiani Università degli Studi di Milano, Milano, Italy, G.C. Everest University of Minnesota, Minneapolis, MN, USA, A.L. Furtado Pontificia Universidade Catolica (PUC), Rio de Janeiro, Brazil, D. Gunopulos University of California at Riverside, Riverside, CA, USA, T. Härder Technische Universität Kaiserslautern, Kaiserslautern, Germany, T. Johnson AT&T Research, Florham Park, NJ, USA, T.L. Kunii University of Tokyo, Tokyo, Japan, S. Link Victoria University of Wellington, Wellington, New Zealand, S.B. Navathe Georgia Institute of Technology, Atlanta, GA, USA, T. Palpanas Universita di Trento, Povo, Italy, D. Papadias University of Science & Technology of China, Kowloon, Hong Kong, China, M. Papazoglou Tilburg University, Tilburg, Netherlands, A. Pirotte Université Catholique de Louvain, Louvain-la-Neuve, Belgium, N. Roussopoulos University of Maryland, College Park, MD, USA, S. Rozen Whitehead Institute for Biomedical Research, Cambridge, MA, USA, A.W. Scheer Universität des Saarlandes, Saarbrücken, Germany, J.W. Schmidt Technische Universität Hamburg-Harburg (TUHH), Hamburg, Germany, H. Schweppe Freie Universität Berlin, Berlin, Germany, D.G. Severance University of Michigan, Ann Arbor, MI, USA, T. Shan Charlotte, NC, USA, A.P. Sheth Wright State University, Dayton, OH, USA, A. Tomasic Vercelle Laboratories, Pittsburgh, PA, USA, C. Türker Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland, Y. Vassillou National Technical University of Athens (NTUA), Athens, Greece, J.T.L. Wang New Jersey Institute of Technology, Newark, NJ, USA, A.I. Wasserman Carnegie Mellon University West Coast Campus, Moffett Field, CA, USA, A.V. Zamulin Russian Academy of Sciences, Novosibirsk, Russian Federation