<VTKFile type="vtkMultiBlockDataSet" version="1.0" byte_order="LittleEndian" header_type="UInt64">
  <vtkMultiBlockDataSet>
    <DataSet index="0" name="PD_2" file="poly_data_template.vtp"/>
    <Block index="1" name="GRP_1">
      <DataSet index="0" name="RG_1" file="rectilinear_grid_template.vtr"/>
      <DataSet index="1" name="PD_1" file="poly_data_template.vtp"/>
    </Block>
  </vtkMultiBlockDataSet>
</VTKFile>
