From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Tim O'Callaghan" <tim.ocallaghan@gmail.com>
Subject: Re: property searches for #+CATEGORY
Date: Wed, 7 Nov 2007 14:23:12 +0100
Message-ID: <3d6808890711070523u50bd8bbp963960978171e132@mail.gmail.com>
References: <20071107111730.GH13544@atlantic.linksys.moosehall>
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To: Adam Spiers <orgmode@adamspiers.org>, org-mode mailing list <emacs-orgmode@gnu.org>

On 07/11/2007, Adam Spiers <orgmode@adamspiers.org> wrote:
> I have several personal .org files, and several work-related ones too.
> In each personal file, I have a line:
>
>   #+CATEGORY: personal
>
> and in each work-related file, I have a line:
>
>   #+CATEGORY: work
>
> I would like to be able to bind agenda custom commands to do tag
> searches which are narrowed to one of these categories, e.g. "show me
> all personal priority #A tasks".  Such a search needs to span *all*
> agenda files, therefore the standard per-buffer narrowing provided by
> the '<' binding in the *Agenda Commands* buffer is insufficient.
>
> Would it make sense to include CATEGORY as a special property?  After
> all, pretty much all other per-task meta-data ("TODO", "PRIORITY"
> etc.) are already available via the property interface, and this way,
> I could easily achieve what I need with tag searches such as
>
>   CATEGORY="personal"+PRIORITY="A"
>
> Thanks!
>

It would seem to me that this is exactly what tags does.
You could move everything down a level and use tag inheritance:
* personal stuff :personal:
* work stuff :work:

Tim.