Batch processing to remove unwanted parent tags?

[Info Munky]

Thanks both. There's a whole range of different tag families I need to 
deal with, so what I really need is a script that does something like this:

iterate through photos
     IF photo has tags
         iterate through tag tree AS $tag
             IF $tag has child tags
                 remove $tag

This leaves only each node of the tag hierarchy which has no dependents.
If there's nothing available to do this at present, I might have a look 
at the schema and write an SQL query to do it.
Thanks for the pointer on various EXIF fields being used for tags/keywords.

On 15/01/17 15:32, Andrey Goreev wrote:
> I would try that on few files or on a folder and check the results 
> with "exiftool -s FILE " to make sure you like it.
> Digikam writes tags to many metadata fields not only to Keyword.
>
> Also I think Digikam used to write a|aa|aca to the Keyword field but 
> now it only writes aca there but full hierarchy a|aa|aca being written 
> to XMP Keywords and other fields.
> Please correct me if I wrong.
>
> Sent from my Samsung Galaxy smartphone.
>
> -------- Original message --------
> From: Remco Viëtor <remco.vietor at wanadoo.fr>
> Date: 2017-01-15 7:10 AM (GMT-07:00)
> To: digiKam - Home Manage your photographs as a professional with the 
> power of open source <digikam-users at kde.org>
> Subject: Re: Batch processing to remove unwanted parent tags?
>
> On dimanche 15 janvier 2017 12:44:50 CET Info Munky wrote:
> > Digikam 4.12.0 on Linux Mint 18 Cinnamon
> >
> > I'm considering moving from Shotwell (the simplicity of which I like) to
> > Digikam, primarily because Shotwell doesn't easily allow me to
> > dissociate RAW files from JPGs after import. I've been experimenting
> > with Digikam, getting to grips with it and starting to really love it!
> >
> > Main issue I need to resolve at the moment is how to remove parent tags
> > (in my JPG metadata from Shotwell) where I have a child or children of
> > that parent tag.
> >
> > If my tag hierarchy is something like this...
> >
> > a
> >      aa
> >      ab
> >      ac
> >          aca
> > b
> >      ba
> >
> > ... and photo 1 has tag 'aca' set, I currently have tags 'a', 'ac' and
> > 'aca' showing against the photo either in the tool tip or under the
> > thumbnail. I have seen that after removing 'a' and 'ac', the photo still
> > shows up in a search for either of these tags, because 'aca' is a
> > descendent. So I'd like to remove 'a' and 'ac' from photo 1 to remove
> > clutter when the tags are listed.
> >
> > Obviously I can remove these one by one, but am wondering whether
> > there's a nice script somewhere to do this on a batch basis?
> >
> > Thanks
>
> In the left sidebar, you can search for /select images by tag over the 
> whole
> collection. Do that for your tag "aca", select all, and in the right 
> side bar
> uncheck the tags a and ac. That should do the trick.
>
> It gets a bit unpleasant if you have a very large tag tree, though.

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