In the 21st century, document information services will be controlled both by publicness and economy, and age old practices of free library services will be changed.

• 21世纪,文献信息服务将受公益性和经济性两种机制的综合控制,长期形成的免费获取信息的观念将得到纠正。文献信息的开发趋向于开发有价值的信息;