From mboxrd@z Thu Jan  1 00:00:00 1970
From: Charles Berry <ccberry@ucsd.edu>
Subject: Re: Please help with a filter
Date: Wed, 3 Sep 2014 02:55:49 +0000 (UTC)
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Rafael <rvf0068 <at> gmail.com> writes:

> 
> 
> I want that the result of exporting to markdown the following two blocks
> be identical:

Rafael,

You probably want a derived backend taking 'md as the parent. 

You want to tool up a src-block transcoder.

Look at org-html-src-block (which is what markdown uses) and create
org-md-sage-src-block (say) based on that.

The :language property in `info' - the communication channel - is a human 
language not a computer language. Confusingly, babel has an `info'
variable that has different contents.

Filters might be made to work, but it seems like more work than a
derived backend.

HTH,

Chuck