Crossref is a membership organisation, and it’s the global community of members that creates the Research Nexus together. Meeting our community locally is a highlight and an important learning experience. This year, we started by connecting with a growing community in Accra, Ghana - our first in-person event in the country included in our GEM program. From 14 members in 2023 to 31 in 2025, our community in Ghana is blooming.
At its core, Crossref Accra 2025 was about showing up for the community in Ghana - listening, learning, and building together. On the 20th of March, we welcomed 66 participants: journal editors, university staff, librarians, and researchers. People who are doing the real work of making scholarly publishing happen in the region.
In 2022, we set out to update our DOI display guidelines with the intention to adopt the proposals in 2025. It’s important to note from the outset that we are not mandating any immediate changes to the DOI display guidelines. Instead, we are working with our community to co-create a solution that addresses the diverse needs of all users, rather than imposing technical changes that may not suit everyone.
Sponsors make Crossref membership accessible to organizations that would otherwise face barriers to joining us. They also provide support to facilitate participation, which increases the amount and diversity of metadata in the global Research Nexus. This in turn improves discoverability and transparency of scholarship behind the works.
We are looking for an organization to perform an audit of, and propose changes to, the structure and information architecture underlying our website, with the aim of making it easier for everyone in our community to navigate the website and find the information they need.
Proposals will be evaluated on a rolling basis. We encourage submissions by May 15, 2025.
The Crossmark button gives readers quick and easy access to the current status of an item of content, including any corrections, retractions, or updates to that record.
Crossmark provides a cross-platform way for readers to quickly discover the status of a research output along with additional metadata related to the editorial process. Crucially, the Crossmark button can also be embedded in PDFs, which means that members have a way of alerting readers to changes months or even years after it’s been downloaded.
Research doesn’t stand still: even after publication, articles can be updated with supplementary data or corrections. It’s important to know if the content being cited has been updated, corrected, or retracted. Crossmark makes this information more visible to readers. With one click, you can see if content has changed, and access valuable additional metadata provided by the member, such as key publication dates (submission, revision, acceptance), plagiarism screening status, and information about licenses, handling editors, and peer review.
Crossmark lets readers know when a substantial change affecting the citation or interpretation has occurred, and that the member has updated the metadata record to reflect the new status.
Watch the introductory Crossmark animation in your language:
Members can report updates to readers and showcase additional metadata.
Researchers and librarians can easily see the changes to the content they are reading, which licenses apply to the content, see linked clinical trials, and more.
Anyone can access metadata associated with Crossmark through our REST API, providing a myriad of opportunities for integration with other systems and analysis of changes to the scholarly record.
How Crossmark works
Members place the Crossmark button close to the title of an item on their web pages and in PDFs. They commit to informing us if there is an update such as a correction or retraction, as well as optionally providing additional metadata about editorial procedures and practices.
While members who implement Crossmark provide links to update policies and commit themselves to accurately reporting updates, the presence of Crossmark itself is not a guarantee. However, it allows the community to more easily verify how members are updating their content.
If you use Crossmark, the Crossmark button must be applied to all of your new content, not just content is updated. Selective implementation means that a reader, such as a research or librarian, who downloaded a PDF version before the update would have no way to know that it has been updated. We also encourage you to implement Crossmark for backfile content, although doing so is optional. At least, we encourage you to do so for backfile content that has been updated.
Obligations for Crossmark
Any member can provide update metadata and register an update policy. If you are a member who implements the Crossmark button, you must:
Maintain your content and promptly register any updates.
Include the Crossmark button on all digital formats (HTML, PDF, ePub).
Implement Crossmark using the script provided by us.
Not alter the Crossmark button in any way other than adjusting its size.
Implementing the Crossmark button involves technical changes to your website and production processes. Check that you have the necessarily expertise to implement these before you start. If not, you can start to deliver update metadata and implement the Crossmark button at a later point.
Any organisation can also implement the Crossmark button on pages where they display content. If you do so, you must follow the guidelines above, except for the first point if you are not reponsible for the content.
There are no additional fees to participate in Crossmark.
How to participate in Crossmark
There are several steps for members to fully implement Crossmark:
Devise an update policy, assign it a DOI, and register it with us.
Add the update policy and, optionally, other relevant metadata to your metadata records.
Publish corrections, retractions, and other updates for works where necessary, and register their metadata. See our guidance on registering updates.
Implement the Crossmark button online and in PDFs.
To see which Crossref members are registering Crossmark information, visit Participation Reports. These reports give a clear picture for anyone to see the metadata Crossref has including Crossmark data.
