DataCite Support

DataCite Support

Welcome to DataCite's support site. Here you will find helpful information about our services. We have included comprehensive technical guides, training materials, and tips to help you successfully use DataCite services.

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What characters should I use in the suffix of my DOI?

The easiest and recommended option is to use a randomly generated suffix. The auto-generated DOI strings use a-z, 0-9. They avoid i, l, o as they are easily mixed up with 0, 1. We group the suffix into blocks of 4, separated by a hyphen. You can generate a random suffix in both Fabrica and the API and your DOI will look something like this 10.5438/9te8-5h68.

If you choose not to use this option then remember:

  1. The DOI suffix must be unique within each prefix. The optimum length of a DOI suffix is 6–10 characters.

  2. Only use a-z (lowercase), 0-9 and - in a DOI suffix. Other characters might have special meaning or will be escaped.

  3. Avoid human-readable information in a DOI suffix because any meaning may change over time. Further advice on DOI syntax:

DataCite blog post
Crossref blog post
Reserved characters in Elasticsearch
Technical implementation for generating random DOI strings

Updated about a month ago


What characters should I use in the suffix of my DOI?


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