If the Chicago Symphony directed by George Solti plays Wagner, with Thomas Hampson as a soloist, who do you list in the artist field? How do I search for everything by one of those performers?
> The style guide listed describes fields for a separate composer(s) as well.
My impression is that only the artist or performer field (I forget the exact name) is reliably supported across music software; composer is not.
All of them, according to section 11 of Apple's style guide.
But yeah, most music library software sucks and was developed by people with a non-professional understanding of music, and thus is missing important information they don't know/care about, and/or contains bad assumptions about the cardinality of the data. ID3 was a hobby project that somehow became a defacto standard.