==== application_descriptor

Defined by DVB in <<ETSI-102-809>>.
Must be in an AIT (table id 0x74).

[source,xml]
----
<application_descriptor
    service_bound="bool, required"
    visibility="uint2, required"
    application_priority="uint8, required">
  <!-- One per profile -->
  <profile
      application_profile="uint16, required"
      version="string 'major.minor.micro', required"/>
  <!-- One per transport_protocol_label -->
  <transport_protocol label="uint8, required"/>
</application_descriptor>
----
