wolffd@0: digraph "tree" {
wolffd@0: // The problem disappeared when I removed the "ELEM3 -> ID5;" line!
wolffd@0: //size="4,5";
wolffd@0: ordering=out;
wolffd@0: node [shape=plaintext];
wolffd@0: SPEC -> DEF2;
wolffd@0: SPEC -> DEF1;
wolffd@0: DEF1 -> ID1;
wolffd@0: DEF1 -> SET1;
wolffd@0: DEF1 -> SC1;
wolffd@0: DEF2 -> ID2;
wolffd@0: DEF2 -> SET2;
wolffd@0: DEF2 -> SC2;
wolffd@0: SET1 -> OPEN1;
wolffd@0: SET1 -> ELEM1;
wolffd@0: SET1 -> SC3;
wolffd@0: SET1 -> ELEM2;
wolffd@0: SET1 -> CLOSE1;
wolffd@0: ELEM1 -> ID3;
wolffd@0: SET2 -> OPEN2;
wolffd@0: SET2 -> ELEM3;
wolffd@0: SET2 -> CLOSE2;
wolffd@0: ELEM2 -> ID4;
wolffd@0: ELEM3 -> ID5;
wolffd@0: DEF1 [label=DEF];
wolffd@0: DEF2 [label=DEF];
wolffd@0: SET1 [label=SET];
wolffd@0: SC1 [label=";"];
wolffd@0: SC3 [label=";"];
wolffd@0: SET2 [label=SET];
wolffd@0: SC2 [label=";"];
wolffd@0: OPEN1 [label="{"];
wolffd@0: OPEN2 [label="{"];
wolffd@0: CLOSE1 [label="}"];
wolffd@0: CLOSE2 [label="}"];
wolffd@0: ELEM1 [label=ELEMENT];
wolffd@0: ELEM2 [label=ELEMENT];
wolffd@0: ELEM3 [label=ELEMENT];
wolffd@0: ID1 [label=cities];
wolffd@0: ID2 [label=insects];
wolffd@0: ID3 [label=andover];
wolffd@0: ID4 [label=boston];
wolffd@0: ID5 [label=fly];
wolffd@0: }