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
........................<依建築種類區分之建築元素>
............................<堡壘建築元素>
................................外圍工事
|||....................................外堡
|||....................................有頂通道
|||....................................對抗地道
|||....................................外削壁
|||....................................廊道 (堡壘建築元素)
....................................壕塹 [N]
|||........................................護城河
|||....................................斜堤
|||....................................角堡
|||....................................護城河 [N]
|||....................................木柵
....................................V形棱堡
|||........................................凸角堡
|||....................................內削壁 (堡壘建築元素)
................................城堡外庭 (堡壘建築元素)
|||....................................城堡內庭
|||....................................城堡外庭 (城堡內場)