new file mode 100644

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+digraph "tree" {

+// The problem disappeared when I removed the "ELEM3 -> ID5;" line!

+//size="4,5";

+ordering=out;

+node [shape=plaintext];

+SPEC -> DEF2;

+SPEC -> DEF1;

+DEF1 -> ID1;

+DEF1 -> SET1;

+DEF1 -> SC1;

+DEF2 -> ID2;

+DEF2 -> SET2;

+DEF2 -> SC2;

+SET1 -> OPEN1;

+SET1 -> ELEM1;

+SET1 -> SC3;

+SET1 -> ELEM2;

+SET1 -> CLOSE1;

+ELEM1 -> ID3;

+SET2 -> OPEN2;

+SET2 -> ELEM3;

+SET2 -> CLOSE2;

+ELEM2 -> ID4;

+ELEM3 -> ID5;

+DEF1 [label=DEF];

+DEF2 [label=DEF];

+SET1 [label=SET];

+SC1 [label=";"];

+SC3 [label=";"];

+SET2 [label=SET];

+SC2 [label=";"];

+OPEN1 [label="{"];

+OPEN2 [label="{"];

+CLOSE1 [label="}"];

+CLOSE2 [label="}"];

+ELEM1 [label=ELEMENT];

+ELEM2 [label=ELEMENT];

+ELEM3 [label=ELEMENT];

+ID1 [label=cities];

+ID2 [label=insects];

+ID3 [label=andover];

+ID4 [label=boston];

+ID5 [label=fly];

+}