We propose a system called “Adaptation Anywhere&Anytime(A3)”, which is a framework for making web sites/applications adaptable to user's needs or interests, and we describe the implement of a web site on A3 by using XSLT. Web sites/applications built on A3 construct user ontologies for each user automatically and share them between sites/applications. Each site/application uses the user ontology to select an appropriate resource for the user and to present such resources in a suitable form. And A3 offers the method for constructing the adaptable web sites using XSLT. The author of web sites can easily make their sites adaptable by using XSLT.
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