libvirt 7.2.0 domainbackup

Hello one and all. Just wanted to check out the new feature domainbackup but having trouble to configure it. I thought I just have to put <domainbackup> <disks> <disk name='vda' type='file'> <target file='/var/lib/libvirt/jitsi'/> <driver type='raw'/> </disk> </disks> </domainbackup> at the top level of my domain xml file but that does not seem to work. I get: error: XML document failed to validate against schema: Unable to validate doc against /usr/share/libvirt/schemas/domain.rng Element domain has extra content: domainbackup Can someone please push me in the right direction? cheers, t.