The increasing growth in size and complexity of portals calls for a systematic way to portal development that allows to face the stringent demands imposed on these systems. These demands range from integrating heterogenous data sources to navigation and adaptability concerns
AtariX is a tool for Web portal development built around a set of XMLdocuments. AtariX enables the highlevel description of a Web portalalong distinct orthogonal dimensions. Each concern is separately described in a document: how data is integrated and described (the content document), the topology of links (the navigation document), the layout of each element (the presentation document), how previous apects can dinamically vary based on the current session click stream (the adaptation document) and how control which content has been visited (the tracking document). A distinctive feature of this approach is that it is ontology-centric, that is, the content document defines a set of concepts (as XML tags) to be used as a vocabulary for the other documents. For instance, navigation is not defined in terms of pages but concepts, regardless of how these concepts are finally presented. Hence, we have termed this approach "tag-centric". This enables an abstract construction of the portal independent of how it is finally delivered,facilitating maintenance and portal evolution
Social tagging is one of the hallmarks of Web2.0. The most common role of tags is descriptive. However, tags are being used for other purposes such as to indicate some actions to be conducted on the resource (e.g. “toread”). The “prescriptive tags” have associated some implicit behaviour in the user’s mind. So far, little support is given for the automation of this “implicit behaviour”, more to the point, if this behaviour is outside the tagging site.
ONEKIN, UNIVERSITY OF THE BASQUE COUNTRY