Abstract
In semantically rich hypertexts it is attractive to enable presentation
of a network of nodes and links at different levels
of abstraction. It is also important that the user can interact
with the hypertext using a command repertoire that reflects
the chosen abstraction level. Based on a characterization of
rich hypertext we introduce the concept of an interaction engine
that governs the separation between internal hypertext
representation and external screen presentation. This separation
is...
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