Description of problem:
Zypper supports an extension to rpm-md known as the susedata.(lang.)xml file.
This extension offers a number of extra attributes, as noted here:
* https://pagure.io/rpm-metadata/blob/master/f/suse/yum-schema/susedata.rnc
* https://pagure.io/rpm-metadata/blob/master/f/suse/yum-schema/susedata.rng
This extra repodata file offers two main properties:
* A way to ship proprietary licenses for packages that need explicit user agreement via the EULA tag when the package is requested (susedata.xml)
* A way to ship translations of RPM tags (in susedata.$LANG.xml)
In order to make it possible for SUSE distributions to ship DNF instead of Zypper, we need this data handled if it exists in the repodata, and support for signaling EULA stuff out to frontends (e.g. PackageKit, which *does* support this with the Zypp backend too).
I think you bark on a wrong tree. Fedora is not the right place for solving integration with SuSE distribution. I recommend you instead visiting DNF5 upstream <https://github.com/rpm-software-management/dnf5>.