Zhang xuecheng is a famous historiographer and bibliographer in qing dynasty .

摘要章学诚是清代著名的史学家、目录学家。

The role of the bibliographer is changing from that of developing the local collection to that of mapping the existence of materials and how they are accessed .

图书馆员的角色从发展图书馆馆内的馆藏转为标示连结各种既有的资料,并告诉使用者如何利用.