==== conditional_playback_descriptor

Defined by ARIB in <<ARIB-B25>>.

[source,xml]
----
<conditional_playback_descriptor
    CA_system_id="uint16, required"
    CA_PID="uint13, required">

  <private_data>
    Hexadecimal content
  </private_data>

</conditional_playback_descriptor>
----
