<?xml version="1.0" encoding="UTF-8"?>
<tsduck>
  <_descriptors>

    <reference_descriptor
        information_provider_id="uint16, required"
        event_relation_id="uint16, required">
      <!-- One per reference -->
      <reference
          reference_node_id="uint16, required"
          reference_number="uint8, required"
          last_reference_number="uint8, required"/>
    </reference_descriptor>

  </_descriptors>
</tsduck>
