Ogg Skeleton allows for attachment of message header fields, given as name-value pairs, that contain some sort of protocol messages about the logical bitstream. This is intended for decode related stuff, such as the screen size for a video bitstream or the number of channels for an audio bitstream.
== [[CMML]] ==
The [[CMML|Continuous Media Markup Language]]
allows time-based marking up of media streams, at its simplest this allows you to divide media files into clips and provide information about each clip.
== [[M3F]] ==