Currently they are for special purposes only, and thus not used as a part of the union tag. git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@338184 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
a server-side copy/move. git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@288617 283d02a7-25f6-0310-bc7c-ecb5cbfe19da