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>
....................................<屋頂與屋頂構造>
........................................<屋頂構造>
............................................<外部屋頂構造>
................................................<屋簷與屋簷構造>
....................................................屋簷
|||........................................................閉簷
|||........................................................敞簷
....................................................<屋簷構造>
|||........................................................簷口板 (屋簷構造)
|||........................................................挑口板
|||................................................屋脊樑