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In this paper, we propose an approach for the engineering of web based educational applications. The applications that we focus require advanced functionality for regulating and tutoring learners' activities (dynamics of learning). Our approach aims at proposing models, not only to describe details of such learning situations, but also to characterize the(More)
Visual programming languages (VPLs) provide notations for representing both the intermediate and the final results of a knowledge engineering process. Whereas some VPLs particularly focus on control flow and/or data flow of a software, very few VPLs stress on the interactive dimension of application (dialogue flow). This paper focuses on a VPL allowing(More)
This paper focuses on the production of authoring tools that teachers may use to prototype interactive geographical web applications. We present some computational models and a toolset that we designed to address some needs of teachers trying to make use of particular localized documents called " travel stories ". Our research challenge is to enable(More)
Many Web-based geographic applications have been developed in various domains, such as tourism, education, surveillance and military. However, developing such applications is a cumbersome task because it requires several types of components (e.g., maps, contents, indexing services, databases) that have to be assembled together. Hence, developers have to(More)