(subclass MusicChart List) | Music.kif 1119-1119 | MusicChart 是 串列 的 subclass |
(subclass SinglesChart MusicChart) | Music.kif 1132-1132 | SinglesChart 是 MusicChart 的 subclass |
(subclass AlbumChart MusicChart) | Music.kif 1144-1144 | AlbumChart 是 MusicChart 的 subclass |