From e371c16ffa016e28657c3c036693b686c56a0a91 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@operamail.com>
Date: Tue, 18 Nov 2014 04:21:29 +0100
Subject: alternations and unordered subsequences
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Signed-off-by: Mattias Andrée <maandree@operamail.com>
---
 doc/info/mds.texinfo | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/doc/info/mds.texinfo b/doc/info/mds.texinfo
index 94730fd..d9d629b 100644
--- a/doc/info/mds.texinfo
+++ b/doc/info/mds.texinfo
@@ -5364,6 +5364,51 @@ The other way is to write
 This also requires that @kbd{compose} is not
 released between the key-presses.
 
+The compose table is filled with compositions
+where it does not matter in which order you
+press some of the keys. For example, instead of
+
+@example
+<dead compose> "S" "|" : "$"
+<dead compose> "|" "S" : "$"
+@end example
+
+you can write
+
+@example
+<dead compose> ("S" "|") : "$"
+@end example
+
+@code{( )} denotes an unordered subsequence.
+You can also use @code{[ ]} for alternation.
+For example, instead of
+
+@example
+<dead compose> ("S" "|") : "$"
+<dead compose> ("s" "|") : "$"
+@end example
+
+you can write
+
+@example
+<dead compose> (["S" "s"] "|") : "$"
+@end example
+
+Inside an alternation you can use a dot
+for specify that no key press is needed.
+For example, instead of
+
+@example
+<dead compose> "|" "S" : "$"
+<dead compose> "|" "|" "S" : "$"
+@end example
+
+you can write
+
+@example
+<dead compose> "|" ["|" .] "S" : "$"
+@end example
+
 
 
 @node Discussion
-- 
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