For providing app addon data for the alkimia library an additional category is required:
1st app add-ons
2nd KDE App Addons
The next two levels do not exist and need to be added
3. alkimia (category name: Alkimia)
4. online quotes ( category name: Alkimia Online Quotes)
see https://bugs.kde.org/show_bug.cgi?id=397957 for the initial request