gml4gtk/data/selfedge.dot

/* edge 2->2 is a self edge which has special drawing routine */
digraph "se"
{
 1->2[color="blue"];
 1->3;
 1->4;
 2->2;
 /* edge labels in self edge not supported */
 3->3[label="not-supported" color="#00ff00"];
 /* self edges can have a color */
 4->4[color="red"];
}