Tracks vs. movements... (Score 1)

Most of the popular music delivery services (you can parse this in two ways) consider music contents as constituted of one single sound file (or stream). Classical music works are usually much more than one single "track" and are structured - one level (movements) or more (e.g., for operas: acts, scenes; multiple works, etc.). Only few metadata systems take this into account and know how to present a work as a whole yet structured into its "parts", and without repeating the whole title on each of the parts. Additionally, in most of these systems, there is no real distinction between performer(s) and author(s) (composer of the music, author of the lyrics, etc.).