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+/*
+ * 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>"
+}