藝術與建築詞典根目錄
....物件層面
........視覺及語言傳達
............資訊形式 (層級名)
................<資訊形式 (先導詞)>
....................<文件類型>
........................<依功能區分之文件類型>
............................通信聯繫
................................<依內部形式區分之通信聯繫>
....................................信函 (通信聯繫)
|||........................................商務信函
........................................通函
............................................通喻
|||........................................表格信件
|||........................................匯票通知單
|||........................................意向書
|||........................................介紹信
|||........................................推薦信
|||........................................辭呈
|||........................................情書
|||........................................促銷信函
|||....................................快電