Leonardo Candela Donatella Castelli Yannis Ioannidis Georgia Koutrika Pasquale Pagano Seamus Ross Hans-Jorg Schek Heiko Schuldt Constantino Thanos Corporation for National Research Initiatives March/April 2007 article 10.1045/march2007-castelli http://www.dlib.org/dlib/march07/castelli/03castelli.html English D-Lib Magazine 1082-9873 13 3/4 Copyright 2007 Leonardo Candela, Donatella Castelli, Yannis Ioannidis, Georgia Koutrika, Pasquale Pagano, Seamus Ross, Hans-Jorg Schek, Heiko Schuldt, and Constantino Thanos