romparser.dot

digraph IVX {

	rankdir = LR;

	node [style = invis];
	nil;

	node [style = solid
	      width = 0.8
	      shape = doublecircle
	      fixedsize=true];
	0 [label = "0"];
	1 [label = "1"];
	2 [label = "5"];
	3 [label = "9"];
	4 [label = "2, 7"];
	5 [label = "4"];
	6 [label = "3, 8"];
	7 [label = "6"];

	edge [dir = forward
	      arrowtail = none
	      arrowhead = open];
	
	nil -> 0;
	
	0 -> 1 [label = "I"];
	0 -> 2 [label = "V"];
	
	1 -> 3 [label = "X"];
	1 -> 4 [label = "I"];
	1 -> 5 [label = "V"];
	
	2 -> 7 [label = "I"];
	
	4 -> 6 [label = "I"];
	
	7 -> 4 [label = "I"];
}