Thanks Matthias. Now I understand. So a package like gimp-data-extras (which gimp suggests in Debian) needs to have a metainfo file defining that this software is an addon which extends the functionality of another software. It's defined here https://www.freedesktop.org/software/appstream/docs/sect-Metadata- Addon.html
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553211 Title: gnome-software does not treat recommends and suggests as plugins to applications | impossible to install "technical" packages (plugins, kernels...) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1553211/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
