type of GUI that allows incremental changes (up and down) in level of visible detail (Fractal? http://en.wikipedia.org/wiki/Zooming_user_interface

Alan James Salmoni: The zooming user interface (ZUI) is an idea first discussed by Bederson (1993) as a radical change to the way in which a person interacts with a computer. This paper will initially discuss how a ZUI works, followed by a review of the empirical literature available.

see Jef Raskin

Maybe doesn't have to force pure Hierarchal Structure? WikiGraph Browser, HotSauce

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