Can outputto "tracks" do more than title/track?

I'm writing a web source for the Zune Marketplace and I have it working nicely. One thing that I get back is the actual artist on a per track basis and I'd like to actually use that information. This would work great for soundtracks where the %ALBUMARTIST% is 'Various Artists' but the %ARTIST% is the actual artist performing the song. Is this currently possible?