The full name of DOI is digital object identifier, which is an identifier composed of a series of characters consisting of numbers and letters. It is widely used in academic field and can be used to identify various documents, such as journal articles, books, papers and so on. With DOI, readers can find the information they need on the Internet conveniently and quickly, and can ensure that the information they find is correct and credible.

The function of DOI is not only to identify documents, but also to provide various metadata information, such as author, publishing house, publication date and so on. These metadata can help readers better understand and use literature materials. In addition, DOI can also be used to quote and refer to other documents, which is convenient for academic exchange and knowledge dissemination.

The use of DOI is very simple. Just fill in the DOI in the corresponding search box, and you can quickly find the required literature. At present, more than 800 million dois have been issued around the world, which come from different publishers, databases and institutions. For scholars, linking their publications with DOI can improve their academic reputation and influence. At the same time, in the process of academic publishing, the publishing house will also give DOI to better manage and disseminate academic achievements.