Q: What are DOIs and PMIDs?


 

A:

What is a DOI? A DOI (digital object identifier) is a unique string of numbers, letters and symbols assigned to an electronic document and provides it with a persistent/permanent web address (URL). A DOI always starts with a "10". Any digital object can be assigned a DOI, including journal articles, government reports, data sets, and conference proceedings.

DOI examples:

  • 10.1109/5.771073
  • 10.1016/j.joi.2015.11.008
  • 10.1037/pspi0000045
  • https://doi.org/10.1000/182

To find out if a document has a DOI, you can use a Metadata search engine like CrossRef https://search.crossref.org/

What is a PMID? Similar to a DOI, a PMID (PubMed Identifier) is a unique numerical identifier assigned to digital objects indexed in the PubMed database. These include research articles, books, editorials, and opinion pieces.

PMID examples:

  • 23193287
  • 18287687
  • 27158321

Last Updated: Nov 22, 2024

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