<domainsnapshot>
  <name>my snap name</name>
  <description>!@#$%^</description>
  <disks>
    <disk name='hde' snapshot='external' type='file'>
      <source file='/path/to/new2'>
        <seclabel model='dac' relabel='no'/>
      </source>
    </disk>
  </disks>
</domainsnapshot>