Index: doc/user/EHMHierarchy.fig
===================================================================
--- doc/user/EHMHierarchy.fig	(revision 96a05cdeb216257082dd12c9e88c42f497932356)
+++ doc/user/EHMHierarchy.fig	(revision 96a05cdeb216257082dd12c9e88c42f497932356)
@@ -0,0 +1,38 @@
+#FIG 3.2  Produced by xfig version 3.2.5b
+Landscape
+Center
+Inches
+Letter  
+85.00
+Single
+-2
+1200 2
+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
+	 4950 1425 3975 1200
+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
+	 3750 1875 4425 1650
+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
+	 6000 1875 5475 1650
+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
+	 1950 1425 3000 1200
+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
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+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
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+2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 90.00
+	 4950 1950 4950 1725
+4 1 0 100 0 0 12 0.0000 0 135 195 1950 1650 IO\001
+4 1 0 100 0 0 12 0.0000 0 135 870 4950 1650 Arithmetic\001
+4 1 0 100 0 0 12 0.0000 0 135 315 1350 2100 File\001
+4 1 0 100 0 0 12 0.0000 0 135 690 2550 2100 Network\001
+4 1 0 100 0 0 12 0.0000 0 180 1170 3750 2100 DivideByZero\001
+4 1 0 100 0 0 12 0.0000 0 135 750 4950 2100 Overflow\001
+4 1 0 100 0 0 12 0.0000 0 135 855 6000 2100 Underflow\001
+4 1 0 100 0 0 12 0.0000 0 180 840 3450 1200 Exception\001