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From: =?ISO-8859-1?Q?Thierry_Pell=E9?= <perso@thierry-pelle.eu>
Subject: Doc patch : using session none
Date: Mon, 01 Dec 2014 17:40:58 +0100
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Hi, I hope this works (and is correct), it's the first time I dare ...

diff --git a/doc/org.texi b/doc/org.texi
index d508c06..c229187 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -15563,13 +15563,18 @@ execution.
  @cindex @code{:session}, src header argument
  
  The @code{:session} header argument starts a session for an interpreted
-language where state is preserved.
+language where state is preserved.  By default, a session is not started.
  
-By default, a session is not started.
-
-A string passed to the @code{:session} header argument will give the session
-a name.  This makes it possible to run concurrent sessions for each
-interpreted language.
+@itemize @bullet
+@item @code{none}
+The default.  Each block is evaluated in its own session.  The session is
+not preserved after the evaluation.
+@item @code{other}
+Any other string passed to the @code{:session} header argument will give the
+session a name.  All blocks with the same session name share the same
+session.  Using different session name enables concurrent sessions (even for
+the same interpreted language).  E.g., @code{:session mysession}.
+@end itemize
  
  @node noweb
  @subsubsection @code{:noweb}