We introduce a new approach for creating and viewing hypertexts in a collaborative manner. The hypertext is understood to be an <i>intension</i>, in the logical sense, i.e., a mapping from multidimensional contexts to simple texts. Creation and navigation then correspond to moving from one context to another, and links are made relative to the current context. Using an active context called an <i>æther</i>, collaborative hypertexts can be built, in which several users can view the same hypertext together, each with their own preferences. We give a summary of a Web-based infrastructure supporting the use of collaborative, intensional hypertexts.
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