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<opt>
<parmsets name="EXAMPLE2">
...
  <regional name="region4" value="none" /> 
</parmsets>
</opt>

$VAR1 = {
          'parmsets' => {
...
                        'EXAMPLE1' => {
                                      'regional' => {
                                                    'region1' => {[...
+]

$VAR1 = {
          'parmsets' => {
                        'regional' => {
...
                                 }
                      }
        };