==== Network Information Table (NIT)

Defined by DVB in <<ETSI-300-468>>.

The optional attribute `preferred_section` indicates in which section
the description of a transport stream should be preferably serialized.
When unspecified for a TS, the corresponding TS description is serialized in an arbitrary section.

[source,xml]
----
<NIT version="uint5, default=0"
     current="bool, default=true"
     network_id="uint16, required"
     actual="bool, default=true">

  <!-- Network-level descriptors -->
  <DESCRIPTOR_LIST>

  <!-- One per transport stream -->
  <transport_stream transport_stream_id="uint16, required"
                    original_network_id="uint16, required"
                    preferred_section="uint8, optional">
    <DESCRIPTOR_LIST>
  </transport_stream>

</NIT>
----
