As our global community continues to grow, it is important for us to build and maintain our connections within it. In March this year, we had the opportunity to visit São Paulo for a community event at the Fundação Getúlio Vargas. The content of our presentations is available online. Events such as this provide an opportunity for us to update our members on Crossref fundamentals and developments, and help us better tune in to the varied needs of our communities and learn how we can work together more effectively. This was our third visit to Brazil, with previous events held in Campinas and São Paulo in 2016, and Goiânia and Fortaleza in 2018.Â
Each organization in the global community of Crossref members (that’s currently over 24k organizations in 166 different countries) plays a key role in building the Research Nexus. Any opportunity we have to meet with our members in person is a highlight and a way for us to learn more from each other. The month of January saw three of us travel to Bangkok to attend the first-ever Charleston Conference organised in Asia and to meet with our growing community in Thailand.
This year, we placed a spotlight on the Latin American community, hosting the second Crossref Metadata Sprint in São Paulo, Brazil from 4 - 6 March 2026. In our first tri-lingual event, we brought together 31 participants from Argentina, Brazil, Colombia, Ecuador, and Mexico. Our goal was to foster community co-creation using the open scholarly metadata. The Sprint was an opportunity to pose questions, share ideas, collaborate on research, and propose innovative solutions that enhance the use of metadata in scholarly communication and beyond.
Read on for more details about the content of the Sprint, and the resulting projects. You can also register to join our Sprint Showcase call on 22nd April to hear directly from the team about their creations.
On 17 March 2026, we experienced an outage that affected DOI resolution for Crossref DOIs and the deposit of metadata records by Crossref members. In this summary, we outline what happened, the impact on our community, and the steps we are taking to strengthen our systems and processes as a result.
Registering your DOI records using OJS version 3.4
You can register your DOI records with us using the OJS (Open Journal Systems) platform by enabling the Crossref Manager plugin. We highly recommend including your references in the metadata you send to us, too - you can do this by adding the OJS references plugin. The instructions below are for configuring OJS version 3.4 (more in Public Knowledge Project’s (PKP) documentation).
As Journal Manager, under Settings, click Website > Plugins.
Under Installed Plugins, scroll down to the section labelled Generic Plugins.
Click the checkbox next to the plugin description to enable the plugin.
Step 2: Setting up automatic DOI registrations in OJS 3.4
Go to the Distribution menu
Select the DOI tab
Click on the Setup option
Check the box to allow DOIs to be assigned to your published works
Check the box to determine which items DOI will be assigned
Enter your Crossref assigned DOI prefix. Your prefix will start with 10. and is in the format 10.xxxx (e.g., 10.5555).
Select your preferred stage for automatic DOI assignment to your articles (can be upon the article reaching copyediting stage or upon article publication).
Select your preferred method of DOI suffix generation (can be Default, None for manual entry of suffixes, or Custom pattern)
Next, switch to the ‘Registration’ tab menu
Select Crossref your ‘Registration Agency’ from the drop down options. If you don’t see “Crossref” in the list, navigate to Website > Plugins > Plugin Gallery to enable the ‘Crossref Manager Plugin’.
Check the box under ‘Automatic Deposit’ to enable automatic DOI deposits from your OJS instance.
Enter your name here as the depositor.
Enter your email here as the depositor (all deposit emails will be sent to this email).
Enter your assigned Crossref username. For example support@crossref.org/abcd
Note: if the combination of username and password is incorrect, OJS will return a ‘401 unauthorized status code’ error at the time of registration. This error indicates that the username and password are incorrectly entered. That is, they do not match the username and/or password set with Crossref.
If you are using organisation-wide, shared role credentials (i.e. your username is a collection of letters), you can simply add in your shared username and password.
If you are using personal user credentials that are unique to you (i.e. your username is your email address), you’ll need to add your email address and your role into the username field, and your personal password into the password field. Here’s an example of what this will look like:
Enter your set personal password into the password field.
IMPORTANT: Leave the test checkbox unchecked.
Step 3: Activate the OJS references plugin
The OJS references plugin is available from OJS 3.1.2 onwards. The plugin will use the Crossref API to check against plain text references and locate possible DOIs for articles. The plugin will also allow the display of reference lists on the article landing page in OJS and deposit them as part of your metadata deposit. Linking references is a requirement of Crossref membership.
Workflow Settings
Click ‘Settings’ and then ‘Workflow’ from your dashboard
Under the ‘Submission’ tab, choose ‘Metadata’!
Scroll down to the bottom and find the ‘References’ section
Make sure you enable references metadata by clicking the checkbox ‘Enable references metadata’. You also need to select the option ‘Ask the author to provide references during submission’.
Click save!
Website Settings
Then you need to activate the references plugin on the website, too, by following the instructions here:
Click ‘Settings’ and then ‘Website’ from your dashboard
Choose the ‘Plugins’ tab.
Search ‘Crossref reference linking’
Click the ‘Crossref reference linking’ checkbox
This plugin will deposit the references that you enter into the XML deposit.
Additional OJS plugins for Crossref
In addition to the Crossref XML plugin for OJS, there are also other important plugins that can be enabled in OJS to enrich your metadata records:
Funding Metadata plugin - as of OJS 3.1.2, it is possible to enable a funder registry plugin for submitting funding information to Crossref. The plugin will use the Open Funder Registry to check against existing funding agencies. The plugin will include funding information in your Crossref DOI deposits.
Similarity Check plugin - if you are using OJS 3.1.2 or above, you are able to use the Similarity Check plugin. This will enable you to automatically send manuscripts to your iThenticate account to check their similarity to already published content. You will need to be subscribed to Crossref’s Similarity Check service for this to work.
ROR plugin - the ROR Plugin for OJS enables authors to add the ROR ID for the organization they are affiliated with.
Getting help with OJS plugins
The team at Crossref didn’t create these plugins - they were either created by the team at PKP, or by third-party developers. Because of this, we aren’t able to give in-depth help or troubleshooting on problems with these plugins.