Stiemerling, O. & A. B. Cremers (1998), Tailorable component architectures for CSCW-systems in PDP '98 (6 th Euromicro workshop on parallel and distributed processing), Madrid, Spain. IEEE Press, 302-308.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....any object of the system is like changing the work objects of the system. The Principle of Interpretation is motivated by the fact that modifying a system requires the user to understand what goes on inside it. The relationship between understandability and tailorability is nicely formulated by Stiemerling Cremers (1998: 303) On a very abstract level one could say, an adaptable application has to include a representation of aspects of itself. This self representation needs to be manipulable and causally connected to the represented aspects, i.e. if the representation changes, the application changes as well. ....

Stiemerling, O. & A. B. Cremers (1998), Tailorable component architectures for CSCW-systems in PDP '98 (6 th Euromicro workshop on parallel and distributed processing), Madrid, Spain. IEEE Press, 302-308.

....about it: On a very abstract level one could say, an adaptable application has to include a representation of aspects of itself. This self representation needs to be manipulable and causally connected to the represented aspects, i.e. if the representation changes, the application changes as well. Stiemerling, Cremers 1998: 303. For this reason, language has developed mechanisms for referring to itself (Andersen 1998) So, for example, if I say to my students that language is a self similar system, the students can interrupt: I did not understand the phrase self similar , could you please explain . In this ....

STIEMERLING, O. & A. B. CREMERS (1998). Tailorable component architectures for CSCW-systems. PDP '98 (6 th Euromicro workshop on parallel and distributed processing), Madrid, Spain. IEEE Press, 302-308.

....desirable, mainly because several users of the tailored groupware system might be affected by a tailoring operation. A control mechanism for our component groupware model is to design tailoring constraints, i.e. certain application states or certain application transformations are not allowed (cf. Stiemerling and Cremers, 1998). Besides, it is questionable whether all end users should have the possibility and need for open tailoring. Another control mechanism for our component groupware model is to design tailoring rights, which allows for a model of the distribution of tailoring activities within an organisation (cf. ....

....Besides, it is questionable whether all end users should have the possibility and need for open tailoring. Another control mechanism for our component groupware model is to design tailoring rights, which allows for a model of the distribution of tailoring activities within an organisation (cf. Stiemerling and Cremers, 1998). Moreover, it is likely that only power users such as system administrators, software engineers and help desk members will perform open tailoring. The performers of open tailoring are a dedicated group of users, with specific skills and knowledge. In order to take care of the usability of the ....

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Stiemerling, O. and A.B. Cremers (1998), "Tailorable component architectures for CSCW-systems". In Proceedings of the 6 th Euromicro workshop on parallel and distributed programming, January 21-24 1998, Madrid, Spain, IEEE Press, p. 302-308.

....tailorability are extensibility and composability [6] Extensibility represents the capacity of adding new functions without interfering with existing ones, while composability represents the capacity of composing a function by selecting and combining more basic functions. Stiemerling and Cremers [12] point out three different forms in which a CSCW system can be tailorable using components, viz. changing the parameters of single components, changing the composition of components and changing or extending the implementation of components. These forms of tailorability keep some correspondence ....

Stiemerling, O. and Cremers, A. B.: Tailorable Component Architectures for CSCW-Systems. Proceedings of the 6th Euromicro Workshop on Parallel and Distributed Programming, Madrid (Spain), pp. 302-308, 1998.

....scope of CSCW, the special demands of support for cooperativework make it a critical issue for groupware. Thus, tailoring of groupware raises several questions, which in the mainstream adaptability discussion are not #and do not have to be# addressed # at least not to the degree necessary in CSCW #Stiemerling and Cremers 1998#. 2. COMPUTER SUPPORT FOR COOPERATIVE WORK In general, collaborative work involves a group of two or more people working together on a common goal. In contrast to single user software, where one single user already can pro#t from the software, software for supporting collaborativework ....

Stiemerling, O. and Cremers, A. B. 1998. Tailorable component architectures for cscwsystems. In Proc. 6th Euromicro Workshop on Parallel and DistributedProgramming #Jan. 1998#. IEEE Press.

....without terminating an ongoing cooperation. The goal of this article is to demonstrate how component technology supports an efficient way of constructing extensible CSCW applications. Component models allow one to reason on different levels of abstraction depending on the composition level (Stiemerling and Cremers, 1998). We focus on the component model Java Beans and its supporting integrated development tools (IDE) which let the user create and customize components visually. The user may assemble components into larger composite components using the visual representation provided by an IDE rather than writing ....

....1997) We will follow this approach. JCSCW.tex; 15 12 1998; 15:56; p. 4 5 On the level of programming languages, the possibility to reflect and introspect code is viewed as enabling technology to write tailorable software; reflection in component models is used to support self representation (Stiemerling and Cremers, 1998). Reflection can also be viewed as a design pattern (Buschmann et al. 1996) Dourish proposes a reflective model for collaborative systems (Dourish, 1995) and implemented the toolkit Prospero for CSCW (Dourish, 1996) using this model to express meta information and to allow the change of the ....

[Article contains additional citation context not shown here]

Stiemerling, O. and A. B. Cremers: 1998, `Tailorable Component Architectures for CSCW-Systems'. In: Proceedings of the 6th Euromicro Workshop on Parallel JCSCW.tex; 15/12/1998; 15:56; p.24 25 and Distributed Programming. Madrid, Spain, pp. 302--308. http://www.cs.unibonn.

.... of system design and documentation, so that the system can be adapted to changed patterns of use without undue effort [GSW] The use of existing, open standards, to allow easy interfacing with other systems and software [BH 95] Component based groupware, finally, is called for more recently [tHo98, SC98]. In addition and particular for the application domain CSCW one may alleviate the problem by focusing on the type of support that is provided. Tools that offer objects of some particular structure, relevant for a particular type of work, are more robust to changes in work practice than ....

O. Stiemerling and A.B. Cremers. Tailorable Component Architectures for CSCW Systems. EuroMicro Workshop on Parallel Distributed Processing, Madrid, 1998, IEEE Computer Society, Los Alamitos, CA, 302-309.

....thus lets users extend an existing system through add ons. Yet another approach is to let the entire system be composable from pre fabricated tool components. This removes the barrier between the core system and the add on everything is part of the system s core. Stiemerling and Cremers [10] have identified three categories of tailoring applicable to systems that are composed from software components: 1) changing parameters of single components; 2) changing the composition of components; and (3) changing or extending the implementation of components. These three categories ....

O. Stiemerling and A. B. Cremers. Tailorable component architectures for CSCW-systems. In Proc. 6th Euromicro Workshop on Parallel and Distributed Programming, pages 302--308, Madrid, Spain, Jan. 21--24, 1998. IEEE Press.

....users. How can we support tailorability in the software architecture Regardless whether adaptations are controlled by user or system, they have to be supported on the software technical level. An at least partial specification of the system has to be available in effectively manipulatable form (Stiemerling and Cremers 1998). Some systems (e.g. LINKWORKS which AI Society (2000) 14, pp. 120 141 3 is used in the POLITeam project as groupware platform) are partially implemented in application specific high level languages. The implementation can be made accessible for system administrators or even end users in ....

....mostly in the design process. During the design process the component structure is often lost and with the final system the users are confronted with a monolithic application. In the EVOLVE project we are investigating the use of components for tailorability after initial development (also see Stiemerling and Cremers 1998, Stiemerling et al. 1999) Figure 1 shows the different uses of components for development and tailorability: Component architectures are attractive for tailoring, because they support a number of different tailoring interfaces, from simple parameterization (Henderson and Kyng 1991) over visual ....

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Stiemerling, O. and Cremers, A. B., "Tailorable Component Architectures for CSCWSystems, " in: Proceedings of 6th Euromicro Workshop on Parallel and Distributed Processing, A. M. Tyrrell, Ed., Madrid, IEEE-Press, pp. 302-308, 1998.

....advantage mostly in the design process. During the design process the component structure is often lost and after delivery the users are confronted with a monolithic application. In the EVOLVE project we are investigating the use of components for tailorability after initial development (also see [20]) Figure 1 shows the different uses of components for development and tailorability: components monolithic application components tailorable application Fig. 1: left) components are used only during development, resulting in a monolithic application; right) the component structure of the ....

....applications suited for component based tailorability What are appropriate user interfaces for componentbased tailoring We have formulated and explored these questions by experimentally applying the component based tailoring approach to a real tailoring problem in a groupware project. In [20] and [19] we have reported in detail on this work, in the course of which the need for the support of distributed tailoring was observed. Here, based on these results, we present subsequent work concerning the first and second questions in a distributed environment. 2.1. Component model: from ....

Stiemerling, O. and Cremers, A. B., "Tailorable Component Architectures for CSCW-systems," in: Proceedings of 6th Euromicro Workshop on Parallel and Distributed Processing, A. M. Tyrrell, Ed., Madrid, IEEEPress, pp. 302-308, 1998.

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