Index: trunk/doc/design/06_hierarchy.html
===================================================================
--- trunk/doc/design/06_hierarchy.html	(revision 10020)
+++ trunk/doc/design/06_hierarchy.html	(revision 10021)
@@ -67,7 +67,8 @@
 sheets are often a map of the first level sheets and the connections
 between them, but there's no explicit map of the root sheet
 interconnects, only the implicit binding of global networks.
-Root sheets are typically listed in the project file.
+Sheets are typically listed in the project file and marked whether they
+are root sheets or not.
 
 
 <h2> 6.2. Netname scoping </h2>