The paper aims to provide an overall methodology and case study for the innovation and extension of a digital library, especially the service system.
Based on the three‐dimensional structure theory of the information service industry, this paper combines a comprehensive analysis with the practical experiences of Peking University Library as a case study.
The paper proposes three‐dimensional extensions of a digital library service system. It analyses the respective functions of organisations and librarians, information resources, services and methods and the interactions between them.
Innovatively, the theory of three‐dimensional structures is applied to the discussion of the development of the digital library service system. It is significant for the integrality of a digital library theoretical system, as well as for the practical developments, innovations and sustainability of the digital library.
