[digiKam-users] When do tags get written to image file(s) - how to delete a tag?

[Chris Green]

Andrew Goodbody <ajg02 at elfringham.co.uk> wrote:
> On 20/09/18 17:24, Chris Green wrote:
> > I hope I'm not becoming a big nuisance asking all these questions. :-)
> > 
> > I'm a bit confused about the order in which tag changes (and
> > especially tag deletions) happen.
> 
> Not surprising, it is far from obvious.
> 
> > I deleted a tag using the Tag Manager and assumed that would delete it
> > from the image so I then did "Read tags from image".  However it would
> > appear that my idea of how this works is all wrong as the deleted tag
> > came back.
> 
> OK, yes, the Tag Manager manipulates the list of tags in the database. 
> It does not directly affect the images.
> 
> > So, after using the Tag Manager (or manipulating tags in any other
> > way) how do I guarantee that all my changes are in the image files?
> > I need them to be there for other programs to use them.
> 
> From the Tags Manager window, use the 'Sync Export' dropdown and use 
> 'Write tags from database to image' although I am not 100% confident 
> that this will remove tags from the images that you deleted from the 
> database, but in theory I think it should.
> 
The other tool you can use is in Tools->Maintenance and sync the 
> database to the images.
> 
> Both of the above options seem rather heavy weight to me and liable to 
> touch more files than they need to.
> 
Yes, definitely, they often take a *log* time! :-)


> 
> The way I would use however does not involve the Tags Manager tool at 
> all. Click on the Tags icon in the left sidebar, then select the tag you 
> wish to delete. This should show you all the images that have that tag 
> applied to them. Select all visible images with Ctrl-A. Un-tick the 
> relevant tag in the tags area on the right. Click 'Apply' in the tags 
> area. Right click the tag in the tags area on the right and select 
> 'Delete tag'. This way you know that you are removing the tag from all 
> relevant images and then removing it from the database.
> 
That makes a lot of sense, thank you.

-- 
Chris Green
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