From mboxrd@z Thu Jan  1 00:00:00 1970
From: Carsten Dominik <carsten.dominik@gmail.com>
Subject: Re: Filtering in export hooks
Date: Tue, 6 Sep 2011 10:58:13 +0200
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To: suvayu ali <fatkasuvayu+linux@gmail.com>
Cc: org-mode mailing list <emacs-orgmode@gnu.org>


On Sep 6, 2011, at 10:49 AM, suvayu ali wrote:

> Hi Orgers,
> 
> What is the recommended way to filter/select headlines I want to
> preprocess in any of the export hooks? I have tried using tags like
> this:
> 
> (let ((match "tag1|tag2"))
>  (org-map-entries (lambda () (my-preprocess-function))
> 		   match))
> 
> But this only works when tags: is non-nil. Any hints on how I could
> achieve something that "works always"?

May be I do not understand, but how about

(let ((match "tag1|tag2"))
 (when match
   (org-map-entries (lambda () (my-preprocess-function))
  		   match)))

- Carsten