This paper discusses a new kind of electronic books, hyperbooks, which are structured based on semantical content and relations, and whose structure is explicitly modeled by sets of structural and semantical abstractions based on book content, as well as on didactical and adaptation aspects. The paper extends current hypertext modeling and meta modeling approaches by integrating the notion of meta modeling with the notion of multiple perspectives, and describes the design and implementation of such a book using the KBS Hyperbook System for a CS1 course "Introduction to Programming". 1 Introduction Since the emergence of the World Wide Web, the concept of hypertext has emerged as a main representation and presentation format for a variety of applications, quite prominent among them hypertext books , simply characterized as collections of hypertext documents . In most cases, these hypertext books still retain the conventional book structure and are partitioned into (sub-) documents cal...

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