On 4/5/19 1:15 PM, Maximilian Schieder wrote: Yes there is. /usr/share/libvirt/schemas/storage*.rng. However, our schemas can be more relaxed in some cases than what libvirt actually accepts (this arises from fact that the space of accepted XMLs is just too big). Therefore, you may want to consult: https://libvirt.org/formatstorage.html Michal