| ZVON > Graphotron > Graphotron VCG |
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| Namespace: | http://zvon.org/graphotron/vcg |
| Element: | class |
| Description: | specifies the folding class of the edge. Nodes reachable by edges of a class less or equal to a constant k specify folding regions of k. See the node attribute folding and the folding commands. |
| Values: | integer |