Crossref members register around 37,000 records daily. All this metadata is openly shared with the global scholarly community through our free APIs. We receive over two billion calls to our API each month, signalling its use by hundreds of tools and services worldwide, supporting the discovery and assessment of scholarly metadata. As part of a new series in our blog, we will spotlight the diversity of tools and integrations that rely on Crossref metadata to serve the scholarly community. In this initial post, we chat to Luca Foppiano, the developer and maintainer of Grobid1, to learn about how Grobid uses Crossref metadata to improve the extraction and enrichment of bibliographic information from scholarly PDFs.
On behalf of the Nominating Committee, I’m pleased to share the slate of candidates for the 2026 board election. Every active member organisation is invited to submit a ballot to elect the incoming board class.
We’re providing a summary of the board’s July 2026 meeting. The July board meeting is our only in-person meeting. The board gathers for two days of strategic thinking and long-range planning, as well as conducting annual board business. This year, we focused on allocating surplus funds we have on hand to invest in a three-year project to redesign the content system. In a related discussion, we decided to lower content registration fees starting in 2027 because we’ve had a demonstrated history of generating surpluses, exceeding what we need to run Crossref. We also discussed the board structure, as part of our regular review of stakeholder governance. And we conducted annual board business, such as approving the audited financial statements and reviewed our risk register and mitigation plans.
The resolutions are available on the dedicated section of our website, which also lists the members of the Board and offers further information about our governance.
We also managed to squeeze in watching a World Cup game over dinner.
Starting today, funder names deposited in Crossref metadata without an identifier will be matched to ROR IDs, to support an open and connected Research Nexus. Funding information is an increasingly important part of the scholarly record. The improved matching strategy supports researchers, funders, institutions, and meta-researchers, who rely on that information to understand how research is supported and what outcomes that support produces.
Members can participate in Cited-by by completing the following steps:
Deposit references for one or more prefixes as part of your content registration process. Use your Participation Report to see your progress with depositing references. This step is not mandatory, but highly recommended to ensure that your citation counts are complete.
We will match the metadata in the references to DOIs to establish Cited-by links in the database. As new content is registered, we automatically update the citations and, for those members with Cited-by alerts enabled, we notify you of the new links.
Display the links on your website. We recommend displaying citations you retrieve on DOI landing pages, for example:
If you are a member through a Sponsor, you may have access to Cited-by through your sponsor – please contact them for more details. OJS users can use the Cited-by plugin. If you need more help, you can learn more from PKP’s Cited-by (OJS Scopus/Crossref plugin) - as of OJS 3.2, this third-party plugin allows journals to display citations and citation counts (using article DOIs) from Scopus and/or Crossref.
Citation matching
Members sometimes submit references without including a DOI tag for the cited work. When this happens, we look for a match based on the metadata provided. If we find one, the reference metadata is updated with the DOI and we add the "doi-asserted-by": "crossref" tag. If we don’t find a match immediately, we will try again at a later date.
There are some references for which we won’t find matches, for example where a DOI has been registered with an agency other than Crossref (such as DataCite) or if the reference refers to an object without a DOI, including conferences, manuals, blog posts, and some journals’ articles.
To perform matching, we first check if a DOI tag is included in the reference metadata. If so, we assume it is correct and link the corresponding work. If there isn’t a DOI tag, we perform a search using the metadata supplied and select candidate results by thresholding. The best match is found through a further validation process. Learn more about how we match references. The same process is used for the results shown on our Simple Text Query tool.
All citations to a work are returned in the corresponding Cited-by query.
Page maintainer: Isaac Farley Last updated: 2023-April-28
