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OJS for EveryoneThe Practical GuidebookRSYN Research LLP

DOIs for Academic Journals

A Digital Object Identifier (DOI) is a permanent, unique identifier assigned to a digital object — most commonly a journal article, book chapter, dataset, or research output. DOIs are the global standard for persistent linking in academic publishing.

What Is a DOI?​

A DOI is a string of numbers, letters, and symbols in the format:

10.PREFIX/SUFFIX

For example: 10.1000/xyz123

  • The prefix (e.g., 10.1000) is assigned to the publisher by a DOI registration agency.
  • The suffix (e.g., xyz123) is unique to the individual item and chosen by the publisher.

When a DOI is presented as a URL, it uses the doi.org resolver:

https://doi.org/10.1000/xyz123

This URL always redirects to the current location of the item, even if the article moves to a new platform or URL. That permanent redirectability is the core value of a DOI.

DOI Key Facts

DOIs are managed by the International DOI Foundation (IDF). Key facts:

  • Over 300 million DOIs have been registered.
  • Used by nearly every major journal, publisher, and research repository worldwide.
  • DOI resolution is free for anyone clicking a DOI link.
  • Only members of a DOI registration agency can register (mint) new DOIs.

Source: doi.org/factsheets/DOIKeyFacts.html

Why DOIs Matter for Your Journal​

BenefitDescription
PermanenceArticles remain findable even if URLs change
Citation accuracyDOIs give readers a reliable link to cite
CrossRef indexingCrossRef metadata is shared with thousands of databases
Google ScholarDOI metadata improves Google Scholar indexing
DOAJ complianceDOAJ requires DOIs for inclusion in many categories
Funder complianceMany funders require DOI-citable outputs
Journal credibilityDOIs signal that a journal meets international standards

DOI Registration Agencies​

Several agencies can register DOIs. The main ones relevant to journal publishers are:

CrossRef​

CrossRef is the primary DOI registration agency for academic journals, books, and conference proceedings.

  • Cost: Annual membership fee based on organisation size (starting ~$275/year for independent publishers). Per-DOI fees apply.
  • What you get: DOI registration, metadata deposit, reference linking, cited-by counts.
  • OJS integration: The CrossRef XML Export Plugin in OJS handles automatic deposit.
  • Membership: crossref.org/membership
tip

For OJS users, CrossRef is the standard choice. The Enable DOIs with CrossRef tutorial walks you through the complete setup.

DataCite​

DataCite specialises in datasets, software, and other research outputs (not primarily articles).

  • Use case: Assign DOIs to datasets published alongside your articles.
  • Cost: Membership required; costs vary.
  • OJS integration: Available via the DOI plugin — select DataCite as the registration agency.

Zenodo​

Zenodo is a free, open-access repository operated by CERN that assigns DOIs to any research output — articles, datasets, presentations, code, and more.

How Zenodo DOIs Work​

  • Zenodo assigns DOIs from its own CrossRef-affiliated prefix (10.5281/zenodo.XXXXXXX).
  • Anyone can deposit to Zenodo for free — no membership required.
  • All deposits receive a DOI automatically.
  • Zenodo DOIs are registered with CrossRef and resolve to the Zenodo record page.

When to Use Zenodo DOIs​

  • Preprints: Deposit a preprint to Zenodo before journal submission to establish priority and get a citable DOI.
  • Datasets: Archive research data on Zenodo and cite the DOI in your article.
  • Supplementary materials: Large files (video, software) that cannot be hosted in the journal's OJS.
  • Back-catalogues: Retroactively assign DOIs to older articles from journals that don't have CrossRef membership.
info

Zenodo DOIs are legitimate, CrossRef-registered DOIs. However, if your journal wants to mint DOIs under its own publisher prefix, CrossRef membership is required.

ResearchGate and DOIs​

ResearchGate is an academic social network, not a DOI registration agency. It does not mint DOIs. What ResearchGate does:

  • Displays existing DOIs on article pages (metadata harvested from CrossRef or OAI-PMH).
  • Provides ResearchGate-specific URLs for paper pages (not DOIs).
  • Sometimes auto-uploads a version of an article — authors should check this does not violate their journal's copyright policy.

Authors do not need to do anything special with ResearchGate and DOIs. Once an article is published with a CrossRef-registered DOI, ResearchGate will typically pick up the metadata automatically.

DOI vs. URL — Why URLs Are Not Enough​

DOIURL
PermanencePermanent — the DOI never changesFragile — links break when sites move or are restructured
Reliabilitydoi.org resolver handles redirectsNo central resolution mechanism
MetadataRich metadata registered with CrossRefNo associated metadata
CitationsStandard for academic citationsNot accepted as a citation identifier
DiscoverabilityIndexed in CrossRef, Google Scholar, databasesDependent on search engine crawling

Always include the DOI as the primary persistent link when citing articles.

Setting Up DOIs in OJS​

OJS 3.3+ uses a unified DOI Plugin to manage DOI assignment and registration:

  1. Enable the DOI Plugin — Settings → Website → Plugins → Public Identifier Plugins → DOI.
  2. Configure your prefix and suffix pattern.
  3. Choose your registration agency (CrossRef or DataCite).
  4. Enter your registration credentials.
  5. Assign DOIs to new and existing articles.
  6. Deposit DOIs with your agency.

For step-by-step instructions, see the Enable DOIs with CrossRef tutorial and the official CrossRef OJS Manual.

DOI Best Practices​

  • Assign DOIs before publication — once a DOI is registered, the article URL must never return a 404.
  • Keep URLs stable — never change article page URLs after DOI registration. If you must move, set up a permanent redirect (301) from the old URL.
  • Re-deposit on metadata changes — if an article's title, authors, or abstract change after publication (e.g., after a correction), re-deposit the metadata to CrossRef.
  • Assign issue DOIs — helps with COUNTER statistics and citation tracking at the issue level.
  • Document your prefix — keep a record of your CrossRef prefix; you need it for every OJS configuration.
  • Test before going live — CrossRef provides a test environment. Use it to validate your setup before depositing real DOIs.

Checking and Verifying a DOI​

ToolPurpose
https://doi.org/Paste any DOI to test resolution
CrossRef Metadata SearchSearch CrossRef-registered DOI metadata
CrossRef Submission StatusCheck deposit status for your account
DOI Citation FormatterFormat a DOI as a citation

Further Reading​