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In this simple example vertices are created from each element in the document.
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When a node is matched by several vertex elements, the last match is used
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A node which is not matched does not appear in the output.
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Edges are drawn by edge element. The match attribute specifies the start point, the select attribute the end point of the
edge. If the select attribute contains a relative XPath, than the base nodes are the starting ones (as determined by the match
attribute).
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Parent - child relationship is shown in this graph.
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And lets draw a circle :). As you can see, several edge elements can be used.
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If an edge is matched several times, all edges are drawn.
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So far, daVinci has been used as the visualisation tool. But the graphotron code was generic and so in this example the same
graphotron source is displayed using three different programs.
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Parameters specific to individual graphic package can be set by using elements from the package relevant namespace.
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