Digikam-users Digest, Vol 235, Issue 17

[Frédéric Da Vitoria]

On 13/12/2024 16:16, Steve Franks wrote:
> Frédéric
>
> The problem lies with the tag settings that you have selected in 
> digikam.digikam will read tags from all of these places in your 
> photo's metadata and write tags to them in the appropriate forms.
> digikam as you know has hierarchical tags. Some of the other items in 
> the list are not hierarchical, so if you assign France/Charente 
> Maritime/La Rochelle as a tag, digikam (like other software) will 
> write your single tag as 3 top separate tags.
> France
> Charente Maritime
> La Rochelle
>
> Another complication is that some of the programs use different 
> characters to show a hierarchy. I have seen | \ , and . used by 
> programs over the years. digikam cannot parse these correctly, so it 
> will create tags for each of them.
>
> To prevent this from happening, do the following:-
> 1) Untick all of the settings that you are not currently using. I 
> suggest that you only tick digikam and any other program that you 
> actually use.
> 2) Use exiftool to delete the unwanted tags from your images. It may 
> be possible to use digikam to remove unwanted tags, I don't know.
>     For example:- I think that the following command will remove 
> Microsoft Photo tags:-
>    exiftool -xmp-microsoft:all= -m C:\Photos\ -r -overwrite_original
>     N.B. Change C:\Photos\ to the location of your photos. Try this on 
> a few photos and check the results before running it on all of your 
> photos.
>
> *Hints*
> It is easy to find all of the places where duplicate tags are held in 
> digikam. Type part, or all, of the tag in the right-hand search box.
> e.g.
> TagSearch.png
> Don't duplicate tags unless it's absolutely necessary. In my example I 
> notice that I have duplicated an entry - Magpie and Magpie Moth are 
> the same in the Moth branch.
> In your case you could have a tag for Gardens and leave the word off 
> the tag. In my case I have a tag for Castle under Buildings and for 
> Dover Castle I allocate Places/Dover and Buildings/Castle to my 
> photos, instead of having a single tag " Dover Castle". To find all 
> photos of Dover Castle Select either Castles, or Dover, then apply a 
> Tag Filter of the other tag.
> I hope that this helps,
> Steve

Thank you for your detailed post, Steve. Yes, it confirms some of my 
thoughts.

It is now time to modify my dK tags settings and clean my photos with 
exiftool. But I guess I won't be able to avoid using some 
non-hierarchical data, namely IPTC. I feel not putting the tags in IPTC 
data could lead to compatibility issues with some software. But at least 
I will remove acdsee and MicrosoftPhoto and maybe Dublin Core.

-- 
Frédéric Da Vitoria
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