Despite several efforts for simplifying the composition process, learning efforts required for using existing mashup editors to develop mashups remain still high. In this paper, we describe how this barrier can be lowered by means of an assisted development approach that seamlessly integrates automatic composition and interactive pattern recommendation techniques into existing mashup platforms for supporting easy mashup development by end users. We showcase the use of such an assisted development environment in the context of an open-source mashup platform Apache Rave. Results of our user studies demonstrate the benefits of our approach for end user mashup development.
Adaptivity in web applications raises several concerns. One demands it to be decoupled from the actual application and at the same time wants to use very domain-specific terms for dividing the audience into groups. Two current trends, aspect-oriented programming and semantic web technologies, fit these requirements like a glove. In this paper, we present the AMACONT web modeling framework and use it as an example of how to extend such a framework to make use of these powerful technologies. The underlying concepts, however, can be applied to the modeling of adaptivity in general.
Recently, widget-based Web applications, i. e., mashups have gained momentum, as they make it possible to address the "long tail" of software needs. By enabling data and control flow among widgets-interwidget communication (IWC)-integration of data and functionality can be defined by the end users themselves. However, IWC entails several problems that may reduce the overall user confidence in a system. Based on the results of user studies on the OMELETTE mashup platform, this paper analyzes the problem space and evaluates possible solutions to improve user perception of IWC. Further, a discussion of promising techniques is offered and pending challenges are identified.
Abstract. Aspect orientation offers an intuitive way to specifiy adaptivity for web applications, but despite its advantages, the approach still lacks acceptance. We argue that there are two main reasons for this: First, aspects make implicit assumptions on the underlying system and can thus produce invalid behavior if that system is changed. Second, the lack of concepts for dealing with aspect interactions places a heavy burden on the use of multiple aspects. In this paper we discuss how HyperAdapt addresses these problems, paving the road towards a productive use of aspect orientation in the domain of web applications.
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