From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: creating new #+KEYWORD: variables
Date: Sat, 10 Nov 2018 08:22:01 +0100
Message-ID: <87h8gpcs86.fsf@nicolasgoaziou.fr>
References: <CAN_Dec-69vG61NK9Jh6zYJNxA4OwYE6oD0d11Rh8+K9T4LPZQA@mail.gmail.com>
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In-Reply-To: <CAN_Dec-69vG61NK9Jh6zYJNxA4OwYE6oD0d11Rh8+K9T4LPZQA@mail.gmail.com>
	(Matt Price's message of "Thu, 8 Nov 2018 22:32:52 -0500")
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To: Matt Price <moptop99@gmail.com>
Cc: Org Mode <emacs-orgmode@gnu.org>

Hello,

Matt Price <moptop99@gmail.com> writes:

> I am writing this interface to my university's learning management system:
> https://github.com/titaniumbones/Org-Marking-Mode/tree/use-structured-course-def.
> I am only using hte exporting system tangentially and I have not defined a
> new exporter. However, I would really like to be able to set some variable
> values in the header section of hte document, e.g.:
>
> #+ORG_LMS_COURSE: becomingmodern

You can add keywords specific to a given export back-end in its
definition, more precisely in :options-alist value. For example, in
"ox-texinfo", there is

    (org-export-define-backend 'texinfo
      '((bold . org-texinfo-bold))
      ...
      :options-alist
      '((:texinfo-filename "TEXINFO_FILENAME" nil nil t)
        ...))

which means `texinfo' back-end should recognize the "#+TEXINFO_FILENAME"
keyword, and store its value in the :texinfo-filename property from
"info" paramater, which is passed to each function.

You can write a derived back-end using this new keyword, along with
a template function that actually uses it. Look at the definition of
`beamer' back-end for an example.

HTH,

-- 
Nicolas Goaziou