==== system_management_descriptor

Defined by ARIB in <<ARIB-B10J>>.

[source,xml]
----
<system_management_descriptor
    broadcasting_flag="uint2, required"
    broadcasting_identifier="uint6, required"
    additional_broadcasting_identification="uint8, required">

  <additional_identification_info>
    Hexadecimal content
  </additional_identification_info>

</system_management_descriptor>
----
