A.基本數(shù)據(jù)項描述,數(shù)據(jù)結構定義,數(shù)據(jù)流的說明,數(shù)據(jù)處理描述,外部實體描述
B.基本數(shù)據(jù)項描述,數(shù)據(jù)結構定義,數(shù)據(jù)流的說明,數(shù)據(jù)處理描述,數(shù)據(jù)存儲模式,外部實體描述
C.數(shù)據(jù)結構定義,數(shù)據(jù)流的說明,數(shù)據(jù)處理描述,數(shù)據(jù)存儲模式,外部實體描述
D.基本數(shù)據(jù)項描述,數(shù)據(jù)流的說明,數(shù)據(jù)處理描述,數(shù)據(jù)存儲模式,外部實體描述