ceph/src/boost/libs/graph/example/graphviz_test.dot

   1 digraph G {
   2
   3   subgraph cluster0 {  //subgraph<Graph>
   4     node [style=filled color=white];
   5     style = filled;
   6     bgcolor = lightgrey;
   7
   8     subgraph inner { //subgraph<Graph> or subgraph of subgraph
   9         node [color = green];
  10         a1 -> a2 -> a3
  11
  12     };
  13
  14     a0 -> subgraph inner;
  15
  16     label = "process #1";
  17   }
  18
  19   subgraph cluster1 {
  20     node [style=filled color=white];
  21     b0 -> b1 -> b2 -> b3;
  22     label = "process #2";
  23     bgcolor = lightgrey
  24   }
  25
  26   subgraph cluster1 -> subgraph cluster0 [style=dashed color=red]
  27
  28   start -> subgraph inner[style=dotted];
  29
  30   start -> a0;
  31   start -> b0;
  32   a1 -> b3;
  33   b2 -> a3;
  34   a3 -> end;
  35   b3 -> end;
  36
  37   start [shape=Mdiamond];
  38   end [shape=Msquare];
  39 }