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
........................<結構元素與結構元素構造>
............................<結構元素>
................................<封閉式結構元素>
....................................<拱頂與拱頂構造>
........................................拱頂
............................................複式拱
................................................<依形式區分之複合拱頂>
....................................................<依形式區分之複合拱頂：外形>
........................................................交叉拱頂
............................................................高矢拱
|||................................................................犁頭拱頂
|||............................................................隧道拱頂