If true, allow edges between clusters

type: bool, default: false

See lhead and ltail.

digraph {

  subgraph cluster_a {
    label="Cluster A";
    node1; node3; node5; node7;
  subgraph cluster_b {
    label="Cluster B";
    node2; node4; node6; node8;

  node1 -> node2 [label="1"];
  node3 -> node4 [label="2" ltail="cluster_a"];
  node5 -> node6 [label="3" lhead="cluster_b"];
  node7 -> node8 [label="4" ltail="cluster_a" lhead="cluster_b"];
Valid on:
  • Graphs

Note: dot only.

Search the Graphviz codebase for "compound"