A Digital Object Identifier or DOI code is a persistent identifier or handle used to identify objects uniquely, standardized by the International Organization for Standardization (ISO). The DOI for a document remains fixed over the lifetime of the document, whereas its location and other metadata may change. In case the file's network address changes, the visitor with DOI will still be redirected automatically to the new address of the file.

On the way of applying international standards for articles of Thai Nguyen University’s Journal of Science and Technology (TNU-JST), the journal has registered and granted the DOI international identification code.