Preserving grouped tags from Darktable in Immich

[ontam]

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

Hi, is there any way to import photos with external tags created in Darktable into Immich while preserving the tag grouping structure?
Darktable uses the level_1|level_2 format for grouping tags, whereas Immich seems to use the level_1/level_2 format.

https://docs.darktable.org/usermanual/4.0/en/module-reference/utility-modules/shared/tagging/

Platform

• Server
• Web
• Mobile

[bo0tzz]

Have you tried it? Immich already handles darktable's format.

[ontam]

Yes, I tried it, and the tags were successfully imported, but the groups were split into multiple individual tags. For example, from the tag level_1|level_2, I ended up with two separate tags: level_1 and level_2. I will try again.

[ontam]

Anything new about my problem?

[ontam]

I updated immich and tried again, still same problem:

Tag in darktable, 3 levels:

Same photo in immich with separated group tag (3 levels) into 3 single tags:

Edit:
screen from immich tags explorer

[steph72]

So my bug report was closed as a duplicate, but I still think it has some merit since it analyzes the source of the problem, which should make fixing the bug a little easier:

(and not wanting to step on anyone's toes, but I really think this is a bug, not a feature request)

Darktable stores its tags inside two nodes: A "lr:hierarchicalSubject" node like so:

   <lr:hierarchicalSubject>
    <rdf:Bag>
     <rdf:li>darktable|format|orf</rdf:li>
     <rdf:li>unterwegs|föhr|2024</rdf:li>
    </rdf:Bag>
   </lr:hierarchicalSubject>

and a "dc:subject" node like so:

   <dc:subject>
    <rdf:Bag>
     <rdf:li>2024</rdf:li>
     <rdf:li>darktable</rdf:li>
     <rdf:li>format</rdf:li>
     <rdf:li>föhr</rdf:li>
     <rdf:li>orf</rdf:li>
     <rdf:li>unterwegs</rdf:li>
    </rdf:Bag>
   </dc:subject>

The hierarchy is indicated in the "lr:hierarchicalSubject" node with the "|" sign as path delimiter.

Immich seems to only import the "dc:subject" node.