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DOI: Digital Object Identifier

What it is

A digital object identifier (DOI) is a permanent, unique string of characters that identifies specific digital content such as an online article, dataset, image, etc.). Ideally, when a DOI is assigned (by a publisher, repository host, etc.), there is metadata and a URL which is associated with the DOI which makes the DOI 'resolvable' (point to the digital object or to a web resource that gives you more information about the digital object). 

All DOI numbers begin with a 10 and contain a prefix and a suffix separated by a slash. The prefix is a unique number assigned to organizations; the suffix is assigned by the the organization.



DOIs can often be used in citations in lieu of urls.

Follow the DOI

To make the DOI resolvable, add the DOI to the end of this url:

For example,  doi: 10.1016/j.jalz.2017.09.010


Where to find the DOI

  • Usually located on the first page of an electronic journal article, near the copyright notice or near the author's address.
  • May also be found in the Full Record Display of an article in a database, with the field labeled DOI.
  • Use this format for DOI in your references: doi:xxxxxxxxxxx

Still can't find it?

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