Une approche objet pour l'accès progressif à l'information

This paper deals with the notions of masks and multiple formats which are dedicated to progressive access to information. Progressive access increases the capacity an information system has to adapt itself to each of its users. Masks purpose is to offer more or less complete representations of the structure of information. Multiple formats allow to take into account different representations of a multimedia datum. We propose an object model called PAM (Progressive Access Model) as a support for these notions and which describes the way they can be embedded in a knowledge base. PAM definition relies on AROM, an object-based knowledge representation system, which supports a UML-like formalism. Masks can be applied either to a knowledge base schema, or to a class, or to an association. Variables corresponding to multimedia data can be associated with multiple formats. The PAM is exploited by KIWIS, a generator of web information systems we are currently developing, so that users of any generated system are given a personalized access to knowledge. MOTS-CLÉS : Adaptabilité, Systèmes d'Information Web, Représentation de Connaissances par Objets.