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Re: [Orgmode] Case-sensitivity in regular expressions and sparse trees f

From: Carsten Dominik
Subject: Re: [Orgmode] Case-sensitivity in regular expressions and sparse trees for tags
Date: Fri, 19 Sep 2008 08:09:22 +0200

On Sep 18, 2008, at 5:43 PM, Carsten Dominik wrote:

Hi Chris,

On Sep 17, 2008, at 9:38 PM, Chris Randle wrote:

Hi Gerrit

Forgive me if I've misunderstood regular expressions in Emacs or
Org-mode in some fundamental way!

I have some tags which begin "CD" followed by a number. For example

* Tagged Heading  :CD123:

When I ask for a sparse tree of all tags beginning with "CD", I do

'C-c / T'

And ask for tags of


This doesn't return any of the tagged headlines, but this does:


Is this a bug, or my misunderstanding? Obviously this is no
show-stopper, I just make sure that all my regexp searches are in lower
case, but thought I'd check.

It may be a bug, and a misunderstanding.

1. I do downcase all tage before they are tested in the matcher.
2. This seems to indicate that I do want the matching to be case- insensitive.
3. I do set case-fold-search to nil, which seems to contradict (2)

For now, I recommend to write all regexps with lower case letters. I need to try to remember why I did not set case-fold-search.

I am pushing a fix today which will mkae sure that tags matching is truly case insensitive. So that should make your old regexp work again.

- Carsten

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