DOI – Digital Object Identifier
A Digital Object Identifier (DOI) is a unique string of characters that is used to identify and locate digital content, such as articles, datasets, and other research materials. It is a standard way of identifying and citing digital objects, and it enables users to access the content through a persistent link. A DOI is typically associated with a specific version of a work and does not change, even if the work is updated or moved to a different location. The DOI system is managed by the International DOI Foundation (IDF) and is used by many publishers, libraries, and research organizations around the world.