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- digraph G {
- subgraph cluster0 { //subgraph<Graph>
- node [style=filled color=white];
- style = filled;
- bgcolor = lightgrey;
- subgraph inner { //subgraph<Graph> or subgraph of subgraph
- node [color = green];
- a1 -> a2 -> a3
- };
- a0 -> subgraph inner;
- label = "process #1";
- }
- subgraph cluster1 {
- node [style=filled color=white];
- b0 -> b1 -> b2 -> b3;
- label = "process #2";
- bgcolor = lightgrey
- }
- subgraph cluster1 -> subgraph cluster0 [style=dashed color=red]
- start -> subgraph inner[style=dotted];
- start -> a0;
- start -> b0;
- a1 -> b3;
- b2 -> a3;
- a3 -> end;
- b3 -> end;
- start [shape=Mdiamond];
- end [shape=Msquare];
- }
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