The Digital Object Identifier (DOI®) System is a managed system for persistent identification of content on digital networks. It is both an identifier and a system for resolving identifiers to URLs. It is a draft ISO International Standard (ISO/FDIS 26324). It can be used to identify physical, digital, or abstract entities; these names resolve to data specified by the registrant, and use an extensible metadata model to associate descriptive and other elements of data with the DOI Name. The DOI System is implemented through a federation of Registration Agencies, under policies and common infrastructure provided by the International DOI Foundation which developed and controls the system.
IFRRO is an affiliate member of the International DOI Foundation.