DOI (Digital Object Identifier)

What is DOI and what is it for?
The Digital Object Identifier (DOI) is a system for the identification and exchange of intellectual property in the digital environment. It is a persistent and unique identifier of digital objects (articles, books, book chapters, images, multimedia products, etc.), and a system that processes this identifier on the Internet to offer digital services.

Is it the same as a URL?
The DOI differs from an Internet address (URL) because it identifies the object (article, book, etc.) and not where it is located.

How does DOI work?
It consists of two elements divided by a slash: on the left side of the bar there is a number (the prefix) identifying the entity provided by the International DOI Foundation, on the right side of the bar there is another code (the suffix), provided by the entity being registered, which can be any alphanumeric string. This suffix can be any standard identifier, such as the ISBN or any other proprietary identifier. The criterion that determines the validity of a DOI is that it is unique.