MoMM 2009 ERPAS Proceedings of MoMM2009 Aspect-Oriented Modeling of Adaptive Web Applications with HiLA Gefei Zhang Ludwig-Maximilians-Universit t M nchen email@example.com Â ABSTRACT Modeling adaptivity is a challenging task for two reasons: 1) adaptation is usually strongly interwoven with the general functionality of the web application, separation of concerns is hard to achieve, and 2) adaptation rules may be con Âicting, i.e., changing and revoking the effect of each other. We propose to use our aspect-oriented extension of UML state machines, High-level Aspects (HiLA), to model adaptation rules of web applications. With HiLA, adaptation rules can be modeled separately from the general functionalities. We also provide an automatic technique for checking the consistency of the aspects (i.e., the adaptation rules). Therefore, HiLA provides valuable help for modularly modeling adaptive web applications and keeping the adaptation rules consistent. 1. INTRODUCTION Being one of the key instruments to tie the generally a priori unknown users in a highly competitive market, adaptivity is a very important feature of modern web applications. Modeling adaptation rules elegantly is a highly desirable goal of Web Engineering. Since adaptation is usually interwoven with general functionalities of the web application, Âelegance Â is hard to achieve.
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