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
........................<開口與開口結構>
............................開口
................................<依形式區分之開口>
....................................<門口與門口結構>
|||........................................門口
........................................<門口結構>
|||............................................空氣門
|||............................................門邊立木
............................................<門框與門框結構>
............................................<門與門的結構>
|||............................................門檻
|||............................................門口鋪石
|||............................................門頭飾
|||............................................門檻
|||............................................入口中柱 (門口結構)
|||....................................斜片百葉窗