I occasionally take analogue pictures which I track with Photographer's Notebook (https://f-droid.org/repository/browse/?fdid=unisiegen.photographers.activity). The app is able to export XML files. Currently, I have to write everything manually with digikam's Metadata Editor. (Please tell me, if there's already a better way). Therefore, I'd like to see a possibility to import arbitrary XML metadata via the BQM.