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

    <node_relation_descriptor
        reference_type="uint4, default=0"
        information_provider_id="uint16, optional"
        event_relation_id="uint16, optional"
        reference_node_id="uint16, required"
        reference_number="uint8, required"/>

  </_descriptors>
</tsduck>
