A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization
Independence, a document to be independent from another country Digital object identifier, an international standard for document identification United States Department
identification (the process of identifying), or an identifier (that is, an instance of identification). An identifier may be a word, number, letter, symbol
A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The
Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. The term Globally Unique Identifier (GUID) is also used