(1)全文數(shù)據(jù)庫 (2)書目數(shù)據(jù)庫 (3)事實(shí)型數(shù)據(jù)庫 (4)數(shù)據(jù)型數(shù)據(jù)庫 (5)多媒體數(shù)據(jù)庫