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Hi-Trees and Their Layout

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5 Author(s)
Marriott, K. ; Clayton Sch. of IT, Monash Univ., Clayton, VIC, Australia ; Sbarski, P. ; van Gelder, T. ; Prager, D.
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We introduce hi-trees, a new visual representation for hierarchical data in which, depending on the kind of parent node, the child relationship is represented using either containment or links. We give a drawing convention for hi-trees based on the standard layered drawing convention for rooted trees, then show how to extend standard bottom-up tree layout algorithms to draw hi-trees in this convention. We also explore a number of other more compact layout styles for layout of larger hi-trees and give algorithms for computing these. Finally, we describe two applications of hi-trees: argument mapping and business decision support.

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:17 ,  Issue: 3 )