DOI Usage

This page describes how Dryad assigns DOIs. For information about how to cite data in Dryad, see Citing Data. Recommendations for depositors and users about DOI presentation and placement are included in the Curator's messages to authors and journals, and can be found on the Depositing Data and Using Data pages of the repository website.

Dryad assigns DOIs for its data packages and data files. DOIs provide persistent links and can be used to cite Dryad content.

For information about the software system in Dryad that manages DOIs, see DOI Services Technology.

DOI Structure
Dryad's DOI prefix is 10.5061

Identifiers in Dryad need to contain the following information:


 * 1) The (DOI or Handle) prefix
 * 2) The string "dryad", for branding purposes
 * 3) An accession number for the data package
 * 4) A version number for the data package
 * 5) (for data files) An accession number for the data file
 * 6) (for data files) A version number for the data file

Sample DOIs:


 * Data package 1234 version 2
 * doi:10.5061/dryad.1234.2
 * By default, if the version number is omitted, the most current version is returned
 * doi:10.5061/dryad.1234
 * The 3rd file of data package 1234 version 2 (first version of this file)
 * doi:10.5061/dryad.1234.2/3.1
 * Data files also allow use of a "default" version. There is only one default identifier per file, which is not affected by the versions of the data package:
 * doi:10.5061/dryad.1234/3

DOI Registration
Dryad uses the EZID service from California Digital Library to assign DOIs. For more technical details, see:
 * DOI Services
 * DOI Services Technology