From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ken Mankoff <mankoff@gmail.com>
Subject: Org, reftex and LaTeX with multiple bibliographies
Date: Fri, 16 Sep 2016 14:19:01 -0400
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To: Org Mode <emacs-orgmode@gnu.org>

Hi Org list,

I'm trying to work with multiple .bib files and having trouble.

In my Org file, I have:

#+LATEX_HEADER_EXTRA:\addbibresource{Library.bib,local.bib}

And this works. I can search for a string in reftex and both bibliographies are found. It does not seem to matter what =reftex-default-bibliography= is set to.

But when I export to LaTeX, pdflatex (or latexmk) doesn't work, and complains:

Biber error: [268] Utils.pm:165> ERROR - Cannot find 'Library.bib,local.bib'!
Latexmk: Biber did't find bib file [Library.bib,local.bib]

And the biber documentation states that you cannot use a comma separated list of bibliographies in an =\addbibresource= command. You should use multiple of those commands.

However, if I use multiple of those commands, then Org only searches in the first bib file, not in both.

While writing this email and testing things yet again, I think I've found a way to get this to work. But I'm pretty sure this is exploiting some bug, and not a recommended method. If I have the \addbibresource{a,b} commented out, Org (reftex?) uses this, but it is not exported. I then repeat it twice, breaking apart the comma, and those get exported. For example:

# Note that the first line below is commented out
# #+LATEX_HEADER_EXTRA:\addbibresource{Library.bib,local.bib}
#+LATEX_HEADER_EXTRA:\addbibresource{Library.bib}
#+LATEX_HEADER_EXTRA:\addbibresource{local.bib}

Is this how others work with multiple bibliographies? Some other method?

Thanks,

  -k.