<MRML>
<Volume
Name='head1' Description='somebodys1' ReferenceID='vol1'></Volume>

<Volume
Name='head2' Description='somebodys2' ReferenceID='vol2'></Volume>

<VolumeArchetypeStorage
FileArcheType='Testing/TestData/imagetest/nrrd/fixed.nrrd' ReferencedNodeID='vol1'></VolumeArchetypeStorage>

<VolumeArchetypeStorage
FileArcheType='Testing/TestData/imagetest/nrrd/moving.nrrd' ReferencedNodeID='vol2'></VolumeArchetypeStorage>

</MRML>