Doi refers to the digital object identifier, which is the best "big data" sample storage and application technology under the background of cloud computing, and is used for the unified distribution of IKE negotiation SA protocol. It is a tool to identify digital information including Internet information. In traditional publications, books, magazines, tapes and CDs, there are international standard numbers (ISBN, ISSN and ISCN) and their barcodes. As the unique identification form of publications, it mainly includes: two-dimensional code, bar code, character code, network domain name and so on. The uniqueness of digital objects is a typical feature of DOI, and it is also an "ID card" number in the digital age.
Doi function:
1. helps to localize links. Chinese DOI system can be used as a part of the localization link scheme, which can increase the availability of access resources and enrich its online bibliography and database resources by providing permanent links to the full-text information in the collection.
2. It can provide link extension services, and library members can use DOI and corresponding metadata for academic research, education, personal and non-commercial purposes;
3. Provide a common management portal for different literature databases;
4. Integrate different databases in a standard way;
5. Enjoy an efficient unilateral link agreement;
6. Enjoy the low-cost expansion and realize the rapid growth of the use efficiency and coverage of self-owned literature resources.