<domainsnapshot>
  <name>my snap name</name>
  <description>!@#$%^</description>
  <disks>
    <disk name='/dev/HostVG/QEMUGuest1'/>
    <disk name='hdb' snapshot='no'/>
    <disk name='hdc' snapshot='internal'/>
    <disk name='hdd' snapshot='external'>
      <source/>
      <driver type='qed'/>
    </disk>
    <disk name='hde' snapshot='external'>
      <source file='/path/to/new'/>
    </disk>
  </disks>
</domainsnapshot>