Index: trunk/doc/design/06_hierarchy.html
===================================================================
--- trunk/doc/design/06_hierarchy.html	(revision 10213)
+++ trunk/doc/design/06_hierarchy.html	(revision 10214)
@@ -139,7 +139,8 @@
 <h2> 6.3. Hierarchical reference </h2>
 
 <p>{des6:15}<a id="des6:15">
-A concrete schematics sheet may reference another sheet via a symbol.
+A concrete schematics sheet may reference another sheet via a symbol
+(called the <i>sheet reference symbol</i>).
 The symbol represents a new instance of the referenced sheet.
 
 <p>{des6:16}
@@ -149,7 +150,7 @@
 the schematics sheets.
 
 <p>{des6:17}
-The name of the sheet is specified by one of the following attributes
+The referenced sheet is addressed by one of the following attributes
 (only one of these shall be specified in a symbol):
 
 <table border=1 cellspacing=0>