/*
 * Process this file with graphviz to produce hierarchy.[png,eps]
 * e.g. dot hierarchy.dot -Tpng > hierarchy.png
 */
digraph hierarchy {
	graph [rankdir="BT"];
	node  [shape="none"];
	F -> D
	F -> E
	D -> A
	E -> A
	D -> B
	E -> C
	A -> "<object>"
	B -> "<object>"
	C -> "<object>"
	"<object>"    -> "<top>"
	"<pair>"      -> "<top>"
	"<procedure>" -> "<top>"
	"<integer>"   -> "<real>" -> "<complex>" -> "<number>" -> "<top>"
}