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

    <component_descriptor
        stream_content="uint4, required"
        stream_content_ext="uint4, default=0xF"
        component_type="uint8, required"
        component_tag="uint8, default=0"
        language_code="char3, required"
        text="string, optional"/>

  </_descriptors>
</tsduck>
