<media_types abstract="true">
	<discrete_media_types abstract="true">
		<application_media></application_media>
		<audio_media></audio_media>
		<image_media></image_media>
		<text_media></text_media>
		<video_media></video_media>
	</discrete_media_types>
	<composite_media_types abstract="true">
		<multipart_media abstract="true">
			<form_data></form_data>
			<alternative></alternative>
		</multipart>
		<message_media>
		</message_media>
	</composite>
</media_types>
