==== CA_contract_info_descriptor

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

[source,xml]
----
<CA_contract_info_descriptor
    CA_system_id="uint16, required"
    CA_unit_id="uint4, required"
    fee_name="string, optional">

  <!-- One per component -->
  <component tag="uint8, required"/>

  <contract_verification_info>
    Hexadecimal content
  </contract_verification_info>

</CA_contract_info_descriptor>
----
