==== Event Relation Table (ERT)

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

[source,xml]
----
<ERT version="uint5, default=0"
     current="bool, default=true"
     event_relation_id="uint16, required"
     information_provider_id="uint16, required"
     relation_type="uint4, required">

  <!-- One per event relation -->
  <relation
      node_id="uint16, required"
      collection_mode="uint4, required"
      parent_node_id="uint16, required"
      reference_number="uint8, required">
    <DESCRIPTOR_LIST>
  </relation>

</ERT>
----
