Information retrieval covers the problems relating to the effective storage, access, and searching of information required by individuals. Currently, information is continuing to grow exponentially, diversifying into many forms and media. In this complex retrieval labyrinth there is a definite need for increased effort aimed at tailoring IR performance to user demands.
As Umberto Eco makes the learned Brother William point out in a moment of reflection visiting the library, the fundamental problem in information retrieval is how to bridge text and its potentiality for providing information to the individual reader.
As a contribution to these continuing efforts of harmony between information and user, the objective of this publication is to exhibit and enhance the theoretical and operative requirements necessary for effective performance, in particular of intermediaries, in information retrieval interaction.
For me this book represents a turning point. It covers more than ten years of progressive research and development work, inspired and supported by colleagues and friends in an international environment.
