Websites employ different structures to provide information to visitors. Nevertheless, users are browsing the web according to their informational needs and comprehensions of the sites, based on the conceptual model in their mind. This delivers a good basis for evaluating web-based systems. Herein we propose a framework for web systems evaluation on the basis of users' actions. Exploiting a special log system and techniques of web usage mining, typical navigational patterns are recognized. As a result, measures for system evaluation are proposed with experimental data.
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