==== material_information_descriptor

Defined by ARIB in <<ARIB-B10>>.

[source,xml]
----
<material_information_descriptor
    descriptor_number="uint4, required"
    last_descriptor_number="uint4, required">

  <!-- One per material -->
  <material
      material_type="uint8, required"
      material_name="string, required"
      material_code_type="uint8, required"
      material_code="string, required"
      material_period="hh:mm:ss, optional"
      material_url_type="uint8, required"
      material_url="string, required">

    <reserved_future_use>
      Hexadecimal content
    </reserved_future_use>

  <material/>

</material_information_descriptor>
----
