How to organize and tag classical music

[Leon di San Marco]

Sorry guys, I don't get it I set AliasTag to "ContentGroup:Group" and included the Group tag in the IndexTag but it still doesn't work. I tried it with a Bartók album. I should see the tracks grouped in two main titles: "Concerto for Orchestra" (5 tracks) and "Music for Strings, Celesta & Percussion" (4 tracks). Instead I still see the 9 tracks as they were before.
I also added "Period" and "Style" in the IndexTag but they don't show up in the index. I use at the moment the connect free app/player and I don't see there any Group (neither in the index nor in the album view when I choose an album) or Period or Style tags. What do I do wrong?
Though I thank you very much for your help…this forum is really good and you answer even faster than I can read