<?xml version="1.0" encoding="UTF-8"?>
<tsduck>
  <_descriptors>

    <ISDB_component_group_descriptor
       component_group_type="uint3, required">

      <component_group
        component_group_id="uint4, required"
        total_bit_rate="uint8, optional"
        explanation="string, optional">

        <CAUnit
           CA_unit_id="uint4, required">

          <component_tags>
            Up to 16 8-bit component tags
          </component_tags>

        </CAUnit>
      </component_group>

    </ISDB_component_group_descriptor>

  </_descriptors>
</tsduck>
