==== digital_copy_control_descriptor

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

[source,xml]
----
<digital_copy_control_descriptor
    digital_recording_control_data="uint2, required"
    user_defined="uint4, default=0"
    maximum_bitrate="uint8, optional">

  <!-- One per component in the service -->
  <component_control
      component_tag="uint8, required"
      digital_recording_control_data="uint2, required"
      user_defined="uint4, default=0"
      maximum_bitrate="uint8, optional"/>

</digital_copy_control_descriptor>
----

Note: as specified in <<ARIB-B10J>>, the `maximum_bitrate` attribute is set in units of 1/4 Mb/s (250 kb/s).
