Import tags from a different database

[Remco Viëtor]

On jeudi 11 décembre 2025 06:58:57 heure normale d’Europe centrale Manuel Bock 
wrote:
> Just take a dummy picture, tag it with all the tags you want to import and
> then import this picture into the new digikam collection.
> 

That could work to transfer a keyword tree.

BUT: OP has images tagged with another (defunct) program and wants to transfer 
the images *with their tags* to digikam. But the tags are only in an SQLite 
database.

A solution would be to read the old database and create or update a sidecar 
file. For that, OP would have to be familiar with SQLite (to read the tags) 
and XML/XMP (to create/update sidecar files). Note that existing sidecars 
should NOT be overwritten, just added to (unhandled XML tags should be 
conserved). Digikam can then read the new and the updated sidecars.