Reference movie descriptor atom ('rmda')
An atom that contains other atoms that describe where to find a particular movie, the system requirements to play that movie, and a quality rating.
Overview
The reference movie descriptor atom contains other atoms that describe where a particular movie can be found, and optionally what the system requirements are to play that movie, as well as an optional quality rating for that movie.
A reference movie descriptor atom’s parent is always a movie reference atom ('rmra'). Multiple reference movie descriptor atoms are allowed in a given movie reference atom, and more than one is usually present.