Index: texinfo.txi
===================================================================
RCS file: /cvsroot/texinfo/texinfo/doc/texinfo.txi,v
retrieving revision 1.147
diff -u -3 -p -w -u -r1.147 texinfo.txi
--- texinfo.txi	6 Jul 2005 00:34:16 -0000	1.147
+++ texinfo.txi	17 Aug 2005 20:24:45 -0000
@@ -12935,6 +12935,9 @@ is ignored.  If @var{flag} is clear, tex
 @code{@@end ifclear} command is formatted.
 @end table
 
+When nesting @code{@@ifclear} and/or @code{@@ifset}, the text is formatted
+or ignored until the @code{@@end} at the same nesting level.
+
 @menu
 * set value::                   Expand a flag variable to a string.
 * ifset ifclear::               Format a region if a flag is set.
@@ -13097,6 +13100,18 @@ command looks like this:
 @@ifclear @var{flag}
 @end example
 
+When nesting @code{@@ifclear} and/or @code{@@ifset} the nesting is
+taken into account when ignoring some text. For example the following 
+code is valid, and if @code{a_flag} is unset the text is ignored up 
+to the second @code{@@end ifset} and not up to the first.
+
address@hidden
+@@ifset a_flag
+@@ifset another_flag
+This text is output if both flags are set.
+@@end ifset
+@@end ifset
address@hidden example
 
 @node value Example
 @subsection @code{@@value} Example