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The Generic Tree Editor
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Trees that are made by a tree editor are a special kind of graph
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consisting of nodes and edges and with a certain representation.
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This tool is intended for generic trees in which all nodes are text
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Trees should satisfy certain constraints. Most constraints
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are specific for the particular technique supported by the editor.
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The most important constraints on trees are that they have a single
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root node and that they do not contain cycles,
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Tree editors have two modes: Editable graph and View as Tree
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mode which can be set with a pair of radio buttons on the left side of
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the main window. In the first mode trees are edited just like in any
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diagram editor whereas in the other mode trees are drawn in a special
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layout and they cannot be edited.
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More about tree editors can be found in chapter 8 of the user's guide.