藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................建築元素
........................<流通元素>
............................<階梯與階梯結構>
................................階梯
....................................<依形式區分之階梯>
........................................<依形式區分之階梯：轉折處>
|||............................................直角轉彎階梯
............................................180度轉彎階梯
|||................................................雙分式階梯
|||............................................單轉向樓梯
|||............................................270度轉彎階梯
|||........................................水梯 (地景元素) [N]