<mrml:MRML xmlns:mrml="http://www.slicer.org/2006-03/mrml#"
           xmlns="http://www.slicer.org/2006-03/mrml#">
<Volume
Name='head1' Description='somebodys1' ID='vol1' StorageNodeRef='#storage1'></Volume>

<Volume
Name='head2' Description='somebodys2' ID='vol2' ref='storage2'>
<VolumeArchetypeStorage ref='#storage2' />
</Volume>

<VolumeArchetypeStorage
FileArcheType='Testing/TestData/imagetest/nrrd/fixed.nrrd' ID='storage1'></VolumeArchetypeStorage>

<VolumeArchetypeStorage
FileArcheType='Testing/TestData/imagetest/nrrd/moving.nrrd' ID='storage2'></VolumeArchetypeStorage>

<Fiducial ID='f1'/>
<Fiducial ID='f2'/>

<FiducialList>
  <Fiducial ref="#f1"/>
  <Fiducial ref="#f2"/>
  <Fiducial ID='f3'/>
</FiducialList>

<List></List> <!-- same as mrml:List -->
<mrml:List>

</mrml:List>
</MRML>