Pre-proceedings of the Second International Workshop on Foundations of Digital Libraries.Budapest, Hungary, September 20, 2007

Preface The present volume contains the papers that will be discussed at the Workshop on "Foundations of Digital Libraries", to be held in Budapest, Hungary, on September 20, 2007, in conjunction with the 11th European Conference on Digital Libraries (ECDL). This is the second workshop in a series dedicated to digital library modelling in general. The first one was held in Vancouver, BC, Canada, on June 23, 2007, in conjunction with the 2007 Joint Conference on Digital Libraries (JCDL). The series of workshops is largely motivated by a major effort to obtain a unified Reference Model for Digital Libraries that has been launched and supported for the past two years by the DELOS Network of Excellence on Digital Libraries, a project supported by the European Commission. The first workshop aimed at contributing to the foundations for digital libraries as a whole. For this workshop,most of the submitted papers have been more specialized and have mostly concentrated on one of the fundamental components of Digital Libraries, i.e., Content. In particular, the selected papers have given attention to architectural aspects of Digital Library services for content abstraction, memorization, and manipulation, as well to several models and functionalities that are critical for advanced content management. We expect that these papers will stimulate an interesting discussion that will contribute to further enhancing the on-going modelling work. In addition, the first workshop served to make the work on the definition of the Reference Model and other related activities more widely known.We hope that the second workshop will serve as a vehicle to further expand the circle of people interested in consolidating the key concepts in the field of Digital Libraries and in participating in future collaborative activities in this direction. Definition of a comprehensive and universally accepted model will have great influence on the development of future Digital Library systems, but reaching that goal requires everyones contributions in a community effort. September 2007 Donatella Castelli - ISTI-CNR, Pisa, Italy Yannis Ioannidis - University of Athens, Hellas