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discuss the relationship between cognition and hypermedia, it is necessary to distinguish between two kinds of applications: " One encourages those who wish to wander through large clouds of information, gathering knowledge along the way. The other is more directly tied to specific problem-solving, and is quite structured and perhaps even constrained " [20,(More)
This paper introduces COAST, an object-oriented toolkit for the development of synchronous groupware, which enhances the usability and simplifies the development of such applications. COAST offers basic and generic components for the design of synchronous groupware and is complemented by a methodology for groupware development. Basic features of the toolkit(More)
In this paper, we report about the design, development, and implementation of the SEPIA cooperative hyper-media authoring environment. It provides results on the following aspects of SEPIA: persistent and shared data storage, hypermedia data model with composites, sophisticated and comprehensive authoring functionality, support for a new rhetoric and for(More)
Early hypertext systems were monolithic and closed, but newer systems tend to be open, distributed, and support collaboration. While this development has resulted in increased openness and flexibility, integrating or adapting various different tools, such as content editors, viewers or even other link servers has remained a tedious task. Many developers(More)
Research on understanding linear texts has shown that comprehension and navigation mainly depend on the reader's ability to construct a coherent mental representation. While the author of a traditional document can use a variety of structural cues to support his readers in building up such a representation, the author of a hyperdocument faces a new problem.(More)
Group formation and access rights management become crucial issues when shared workspaces are used to support flexible, emerging group work. End-Users should be able to form groups and adapt access rights for changing groups and workspaces. Current shared workspace systems do not support this sufficiently. Our approach combines a room metaphor-based shared(More)
This paper describes DOLPHIN, a fully group aware application designed to provide computer support for different types of meetings: face–to–face meetings with a large interactive electronic whiteboard with or without networked computers provided to the participants, extensions of these meetings with remote participants at their desktop computers connected(More)
At the German Distance Learning University, five collaborative distance learning scenarios have been recently identified by students and teachers as an important future form of collaborative learning in the university's virtual learning space. An analysis of these scenarios showed a great variance between them and a need to support run-time tailoring of the(More)
Tailoring groupware has to deal with adapting properties of a shared information space as well as with adapting properties of the cooperation support to the group' s needs. In this paper, an approach for tailoring both aspects of groupware in an integrated fashion is proposed. This approach uses cooperative hypermedia as a unifying representation of shared(More)