It is the best "big data" sample storage and application technology under the background of cloud computing, and is used for IKE to negotiate the unified distribution of SA protocol. Doi has the characteristics of uniqueness, persistence, compatibility, interoperability and dynamic update. DOI is also a complete unique identifier registration and service system, including DOI naming, Internet analysis, data model and management strategy.

Provide registration, analysis, management and various value-added services of DOI. DOI system was officially released as an ISO international standard in 20 12, and became a global standard for identifying and linking digital resources. Provide a general management portal for different literature databases; Integrate different databases in a standard way.

Helps to localize links. Chinese DOI system can be regarded as a part of the localization link plan, which can increase the availability of existing resources and enrich its online bibliography and database resources by providing permanent links to the full-text information in the collection. Can provide linkage extension services.

Library members can use DOI and corresponding metadata for academic research, education, personal and non-commercial purposes; Enjoy an efficient unilateral link agreement; Enjoy low-cost expansion and realize the rapid growth of the use efficiency and coverage of self-owned literature resources.