+++ This bug was initially created as a clone of Bug #1830923 +++

Description of problem:

appstream-util fails to validate appstream metadata, complaining about unknown <url> type.

Version-Release number of selected component (if applicable):

libappstream-glib-0.7.18-4.el9

How reproducible:

Always

Steps to Reproduce:

1. wget https://raw.githubusercontent.com/minetest/minetest/master/misc/net.minetest.minetest.appdata.xml
2. appstream-util validate-relax --nonet net.minetest.minetest.appdata.xml

Actual results:

net.minetest.minetest.appdata.xml: FAILED:
• tag-invalid : <url> type invalid [unknown]
Validation of files failed

Expected results:

net.minetest.minetest.appdata.xml: OK

Additional info:

This works on Fedora 36 (libappstream-glib-0.8.0-4.fc36).

Originally this issue has been reported for RHEL 7 (#1830923) and the answer was that for RHEL 7 it is to late to update the library. But RHEL 9 is rather new and has the lib version higher than that of Fedora 31. And the issue is still present.

If the fix can not be backported to RHEL 9 could you please suggest a workaround for EPEL packages following Fedora Packaging Guidelines:

https://docs.fedoraproject.org/en-US/packaging-guidelines/AppData/#_app_data_validate_usage

https://src.fedoraproject.org/rpms/minetest/blob/rawhide/f/minetest.spec#_179