==== Long Term Service Table (LTST)

Defined by ATSC in <<ATSC-A90>>.

[source,xml]
----
<LTST version="uint5, default=0"
      table_id_extension="uint16, required"
      protocol_version="uint8, default=0">

  <!-- One per data source -->
  <source source_id="uint16, required">

    <!-- One per data event -->
    <data data_id="uint14, required"
          start_time="YYYY-MM-DD hh:mm:ss, required"
          ETM_location="uint2, required"
          length_in_seconds="uint20, required">

      <!-- Optional ATSC multiple_string_structure() containing one or more strings -->
      <title_text>
        <string language="char3, required" text="string, required"/>
      </title_text>

      <!-- Data event descriptors loop -->
      <DESCRIPTOR_LIST>

    </data>

  </source>

</LTST>
----
