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

    <HEVC_timing_and_HRD_descriptor
        hrd_management_valid="bool, required"
        target_schedule_idx="uint5, optional"
        N_90khz="uint32, optional"
        K_90khz="uint32, optional"
        num_units_in_tick="uint32, optional"/>

  </_descriptors>
</tsduck>
