[mb-users] Picard and Album Artist Sortname tagging

[Jacob R]

I've noticed that some of my mp3's have a "TXXX:MusicBrainz Album
Artist Sortname" id3v2.4 tag, while others have "TXXX:ALBUMARTISTSORT"
or both. http://wiki.musicbrainz.org/PicardQt/TagMapping claims the
latter is what's supposed to be used, so is the first variant simply
some remnant in my mp3's from an earlier MB tagger?

I'm messing around with Quod Libet's internal tag mapping and it'd be
useful to know what's official and could be expected to be used in the
future. Thanks --Creap.