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

    <service_group_descriptor service_group_type="uint4, required">
      <!-- One per service when service_group_type == 1 -->
      <service primary_service_id="uint16, required"
               secondary_service_id="uint16, required"/>
      <!-- Optional private data for other group types -->
      <private_data>
        Hexadecimal content
      </private_data>
    </service_group_descriptor>

  </_descriptors>
</tsduck>
