Multimedia-based interfaces to complex services are difficult to create and maintain. An architecture for multimedia presentation systems has been developed in the KIMSAC porject, based on a sharp separation between the services and their associated multimedia interfaces. The architecture supports flexibility in designing the multimedia dialogues for individual services, ranging from dialogues that are designed in great detail, to dialogues that are specified only in intentional ways and for which their presentations can be generated or adapted to the context of their use. Specific attcntion has been given to the needs that charactcrize open service environments exposed to the accessed in parallel, introducing problems in managing the interleaving of dialogues with secveral services. The resulting architecture is compared to existing models for UIMS, highlighting the needs to refine these models when applying them to open service environments.
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