Layout strategies

Based on the topology information obtained by a complete user history, several graphic layouts for the web may be presented to the user (altenatively or simultanously).

Possible layouts are displayed in Fig. 4:

1. Tree
2. Circle
3. Rectangle
4. Horizon tree

Because such a web map may become quite large and intricate, tree condensing and node expansion should be supported, which could be handled this way: Normal nodes are displayed as ovals, condensed trees as squares. Condensing a subtree (clicking on its root) removes it from the window and changes the shape of its remaining root node from an oval to a square. Before expanding a condensed node (clicking on a square node), the user may specify the depth of the resulting tree.

This causes some or all of its leaves to become condensed nodes themselves. Another idea is to use an additional window for the resulting tree when expanding a condensed node.