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

    <dtg_guidance_descriptor
        guidance_type="uint2, required"
        ISO_639_language_code="char3, optional"
        text="string, optional"
        guidance_mode="bool, optional">
      <reserved_future_use>
        Hexadecimal content
      </reserved_future_use>
    </dtg_guidance_descriptor>

  </_descriptors>
</tsduck>
