A simple extension is proposed for enhancing HTML and XML with adaptation. It consists in using the path selectors of style sheet languages such as CSS and XSLT for expressing content and navigation adaptation. The needed extensions to a path selector language are minimal, a few additional constructs suffice. The processor of the language can be kept almost unchanged, no new algorithms are needed. Furthermore, it is proposed to use XML for expressing user model data like browsing history, browsing environment (such as device, time, etc.), and application data (such as user performances on exercises).
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