For openSUSE PPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:favogt:appstream/openSUSE_PPC/home:favogt:appstream.repo
zypper refresh
zypper install appstream-glib
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:favogt:appstream/openSUSE_Factory/home:favogt:appstream.repo
zypper refresh
zypper install appstream-glib
For openSUSE ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:favogt:appstream/openSUSE_ARM/home:favogt:appstream.repo
zypper refresh
zypper install appstream-glib