Definition of digital object identifier in US English:

digital object identifier

(also DOI)


  • A unique and persistent string of characters used to identify a journal article, website, or other item of intellectual property, typically one in digital form.

    • ‘A digital object identifier is an identifier string (combination of numbers and letters) that can be assigned to an item of editorial content and that provides a unique identifier for that item.’
    • ‘Our objective has been to partition the topic of digital object identifiers so that a fundamental portion can be fixed in the very near future sufficiently for getting on with the business of constructing and testing core software.’
    • ‘Each article will be allocated a unique identifying code (the ‘digital object identifier’ or ‘doi’) that can be used in bibliographic searches.’
    • ‘The familiar year, volume and page number references were replaced by a 20 character string known as a digital object identifier.’
    • ‘Constructing queries with the digital object identifier corresponding to each published article would be an ideal means of retrieving articles as DOIs are unique.’