We are very pleased to kick off the New Year with another important schema update and the news that a Grant DOI field is now supported for all record types. This means that Crossref members can explicitly include the Crossref Grant IDs as part of their DOI metadata records for publications and any other output type, accurately linking research outputs to the funding that made it possible, all through metadata. We hope that our members will leverage this to respond to recent calls for stronger funding transparency and best practices for reporting funding sources in research outputs.Â
As we finish celebrating our 25th anniversary, we can look back on a truly transformational year, defined by the successful delivery of several long-planned, foundational projects—as well as updates to our teams, services, and fees—that position Crossref for success over the next quarter century as essential open scholarly infrastructure. In our update at the end of 2024, we highlighted that we had restructured our leadership team and paused some projects. The changes made in 2024 positioned us for a year of getting things done in 2025. We launched cross-functional programs, modernised our systems, strengthened connections with our growing global community, and streamlined a bunch of technical and business operations while continuing to grow our staff, members, content, relationships, and community connections.
Crossref turned twenty-five this year, and our 2025 Annual Meeting became more than a celebration—it was a shared moment to reflect on how far open scholarly infrastructure has come and where we, as a community, are heading next.
Over two days in October, hundreds of participants joined online and in local satellite meetings in Madrid, Nairobi, Medan, Bogotá, Washington D.C., and London––a reminder that our community spans the globe. The meetings offered updates, community highlights, and a look at what’s ahead for our shared metadata network––including plans to connect funders, platforms, and AI tools across the global research ecosystem.
In my latest conversations with research funders, I talked with Hannah Hope, Open Research Lead at Wellcome, and Melissa Harrison, Team Leader of Literature Services at Europe PMC. Wellcome and Europe PMC are working together to realise the potential of funding metadata and the Crossref Grant Linking System for, among other things, programmatic grantee reporting. In this blog, we explore how this partnership works and how the Crossref Grant Linking System is supporting Wellcome in realising their Open Science vision.
A DOI may refer to a journal or book (a title-level DOI), or to a specific article or chapter.
Journals and DOIs
Like a set of nesting dolls, a journal may be made up of volumes, each containing a number of issues, each containing a number of articles. You can assign a DOI at each level, for example:
journal-level-DOI (sometimes called the title-level-DOI) 10.5555/QYPF2031. Like an ISSN, it refers to the whole journal
volume-level-DOI 10.5555/FFFU4804
issue-level-DOI 10.5555/QKLE5634
article-level-DOI 10.5555/CNBT7653
The role of the journal-level-DOI, volume-level-DOI, and issue-level-DOI is to link persistently to a point in the journal structure. These DOIs do not have any associated content, and it does not cost anything to register these DOIs.
However, article-level-DOIs do have associated content, and therefore a fee applies to register these DOIs.
Books and DOIs
Like a set of nesting dolls, a book may be made up of chapters. Again, you can assign a DOI at each level, for example:
book-level-DOI (sometimes called the title-level-DOI) 10.5555/ZAAR1365. Just like an ISBN, it refers to the whole book.
chapter-level-DOI 10.5555/TFWD2627
Both book-level-DOIs and chapter-level-DOIs have associated content, and therefore a fee applies to register these DOIs.
