UPDATE, 14 October 2021: We received several excellent proposals in response to this RFP and we’d like to thank everyone involved for their time and enthusiasm. We are excited to announce the two projects that have been selected, to run through early 2023. Stay tuned!

UPDATE, 24 August 2021: All pools have been migrated to the new Elasticsearch-backed API, which already appears to be more stable and performant than the outgoing Solr API. Please report any issues via our Crossref issue repository in Gitlab. UPDATE, 9 August 2021: The cutovers for the polite and Plus pools are delayed again.

22 June 2021, London, UK and Boston, MA, USA — The future of global open access publishing received a boost today with the signing of a Memorandum of Understanding between the Directory of Open Access Journals (DOAJ) and Crossref.

UPDATE August 2, 2021: This work was awarded to Laura Paglione of the Spherical Cow Group. To date, we have collected around 740 million events from 12 different source since we launched our Event Data service service in 2017. Each event is an online mention of the research associated with a DOI, either via the DOI directly or using the associated URL. However, we know that there is much more out there.

We are delighted to announce the formation of a new Advisory Group to support us in improving preprint metadata. Preprints have grown in popularity over the last few years, with increasing focus brought by the need to rapidly disseminate knowledge in the midst of a global pandemic.

It is time to put the ‘R’ back into R&D. The Crossref R&D team was originally created to focus on the kinds of research projects that have allowed Crossref to make transformational technology changes, launch innovative new services, and engage with entirely new constituencies.

This announcement has been in the works for some time, but everything seems to take longer when there is a pandemic going on, including finding time and headspace to plan out our strategy for the next few years. Over the last year or so we have had our heads down addressing how to scale our 20-yr-old system and operation – and adapting to new ways of working.

Crossref’s Nominating Committee is inviting expressions of interest to join the Board of Directors of Crossref for the term starting in 2022. The committee will gather responses from those interested and create the slate of candidates that our membership will vote on in an election in September. Expressions of interest will be due Friday, June 25th, 2021.

Service Providers work on behalf of our members by creating, registering, querying and/or displaying metadata. We rely on this group to support our schema as it evolves, to roll out new and updated services to members and to work closely with us on a variety of matters of mutual interest. Many of our Service Providers have been with us since the early days of Crossref.

UPDATE, 19 June 2025: We are planning to sunset Metadata Manager at the end of 2025. We will be in touch with affected members throughout the year with guidance and resources on making the switch from Metadata Manager to our new record registration form or alternative content registration methods. For more information and feedback, see this post in the Community Forum. --- Hi, I’m Sara, one of the Product Managers here at Crossref.

Crossref aims to link research together, making related items more findable, increasing transparency, and showing how ideas spread and develop. There are a number of moving parts in this effort: some related to capturing and storing linking information, others to making it available. By including relationship metadata in Event Data, we are taking a big step to improve the visibility of a large number of links between metadata.