Re: [O] :session question

[Andreas Röhler]

Am 27.03.2013 10:27, schrieb Andreas Leha:
> Andreas Röhler <address@hidden> writes:
>
> > Am 26.03.2013 16:31, schrieb Eric Schulte:
> > > Achim Gratz <address@hidden> writes:
> > >
> > > > Am 26.03.2013 13:37, schrieb Eric Schulte:
> > > > > This can be done system wide by setting the language-specific header
> > > > > arguments.
> > > >
> > > > I've yet to see an example on how to do this.
> > >
> > >       #+begin_src emacs-lisp
> > >         (setq org-babel-default-header-args:R
> > >               '((:session . "org-R")))
> > >       #+end_src
> > >
> > >       #+RESULTS:
> > >       | (:session . org-R) |
> > >
> > >       #+begin_src R
> > >       x <- 1
> > >       x
> > >       #+end_src
> > >
> > >       #+RESULTS:
> > >       : 1
> > >
> > >       #+begin_src R
> > >       x
> > >       #+end_src
> > >
> > >       #+RESULTS:
> > >       : 1
> > >
> > > >
> >
> > Hi,
> >
> > this looks very confusing for me.
> >
> > So, what is the purpose of a named session?
> > Understood it being a name-space, whose values don't affect the other ones.
> > What's in python-mode a dedicated shell.
>
> I can't speak for python, but in R, every differently named session will
> run within its own R process.
>
> The cool thing is, that I can work on file_foo.org and file_bar.org
> simultaneously, when file_foo.org uses R-session *foo* and file_bar.org
> uses R-session *bar*.
>
> [...]
>
> Regards,
> Andreas

Okay, that's the expected usage.
How do you read the example displayed?

Looks like a named (:session . "org-R") affects global R namespace.

What did "org-R" say here, what might be the purpose?

Assume it should switch it on. Then "org-R" represents a boolean here?

Best,

Andreas