lhead
Logical head of an edge
type: string, default: ""
When compound is true, if lhead is defined and is the name
of a cluster containing the real head, the edge is clipped to the boundary of
the cluster.
digraph {
compound=true;
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"];
}See limitation.
Valid on:- Edges
Note: dot only.