From mboxrd@z Thu Jan  1 00:00:00 1970
From: jorge.alfaro-murillo@yale.edu (Jorge A. Alfaro-Murillo)
Subject: Re: How to set a default language for source blocks?
Date: Tue, 17 Feb 2015 15:09:20 -0500
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Hi, Grant.

Grant Rettke writes:

> It would be simpler to say "this whole document will be R source 
> blocks, unless I specify other wise". I looked at [the spec]. I 
> wanted to obtain this behavior. I couldn't figure out how. Is it 
> possible?

The problem is that if there is nothing after #+BEGIN_SRC, then 
org-babel-get-src-block-info returns nil. Probably you would have 
to modify org-babel-get-src-block-info so that it returns a 
default when there is nothing after #+BEGIN_SRC. But isn't it 
easier to set org-structure-template-alist as a local buffer 
variable, say in the first line of your file something like:

#+BEGIN_EXAMPLE
  # -*- org-structure-template-alist: '(("s" "#+BEGIN_SRC 
  python\n?\n#+END_SRC")) -*-
#+END_EXAMPLE

Then <s followed by TAB, would always get you python for that 
file, for example.

Best,

-- 
Jorge.