==== target_region_descriptor

Defined by DVB in <<ETSI-300-468>>.

[source,xml]
----
<target_region_descriptor country_code="char3, required">
  <!-- One per region -->
  <region country_code="char3, optional"
          primary_region_code="uint8, optional"
          secondary_region_code="uint8, optional"
          tertiary_region_code="uint16, optional"/>
</target_region_descriptor>
----
