Hi, here is a proposal for some change on the ":session" header doc.
Comments are welcome!
Thierry
diff --git a/doc/org.texi b/doc/org.texi
index c1e84d4..45e177e 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -15566,7 +15566,9 @@ execution.
@cindex @code{:session}, src header argument
The @code{:session} header argument starts a session for an interpreted
-language where state is preserved. By default, a session is not started.
+language. All code block of this langage is executed into the same
+interpreter process, the state of the session being preserved as long as Emacs
+runs. By default, a session is not started.
@itemize @bullet
@item @code{none}
@@ -15574,9 +15576,9 @@ 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}.
+session a name (possibly empty). All blocks with the same session name share
+the same session. Using different session name enables concurrent sessions
+(for the same interpreted language). E.g., @code{:session mysession} or
@code{:session}.
@end itemize
@node noweb
