From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Riley <rileyrg@googlemail.com>
Subject: Re: taking note when clocking out
Date: Thu, 14 Apr 2011 14:40:42 +0200
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Giovanni Ridolfi <giovanni.ridolfi@yahoo.it> writes:

> Richard Riley <rileyrg@googlemail.com> writes:
>
> Hi, Richard, 
> nice solution.
>>
>> btw, when entering a tag "-" is illegal?
>
> yes, underscore should be used.
>
> 1. from the manual:
>       Tags are normal words containing letters, numbers, `_',
>       and `@'.
>
> 2. from the source ;-)
>    org-set-tags in org.el
>     tags (org-re "[^[:alnum:]_@#%]+"))
> (line 12959)
>
> and few lines (12950) up  + or - are used in the search, see 
> section "Match syntax" under "Matching tags and properties"
> in the manual.
>
> Hope that explains.
>

yeah, I completely had a brain fart over that one. I did actually know
that but .. forgot ... ;)

ps I have signed fsf papers if that little utility snippet is any good
(ok, will need a defvar I guess for the tag used).