Manuscript submission systems and metadata completeness in Crossref: Patterns and associations

Crossref: The sustainable source of community-owned scholarly metadata

This paper describes the scholarly metadata collected and made available by Crossref, as well as its importance in the scholarly research ecosystem. Containing over 106 million records and expanding at an average rate of 11% a year, Crossref’s metadata has become one of the major sources of scholarly data for publishers, authors, librarians, funders, and researchers. The metadata set consists of 13 content types, including not only traditional types, such as journals and conference papers, but also data sets, reports, preprints, peer reviews, and grants. The metadata is not limited to basic publication metadata, but can also include abstracts and links to full text, funding and license information, citation links, and the information about corrections, updates, retractions, etc. This scale and breadth make Crossref a valuable source for research in scientometrics, including measuring the growth and impact of science and understanding new trends in scholarly communications. The metadata is available through a number of APIs, including REST API and OAI-PMH. In this paper, we describe the kind of metadata that Crossref provides and how it is collected and curated. We also look at Crossref’s role in the research ecosystem and trends in metadata curation over the years, including the evolution of its citation data provision. We summarize the research used in Crossref’s metadata and describe plans that will improve metadata quality and retrieval in the future.

You are Crossref - Crossref

Crossref runs open infrastructure to link research objects, entities, and actions—creating a lasting and reusable scholarly record that underpins open science. Together with our >25,000 members in 167 countries, we drive metadata exchange and support 2.1 billion monthly API queries, facilitating global research communication, for the benefit of society.

How Grobid uses Crossref metadata to enrich bibliographic information - Crossref

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.

Evaluating Multilingual Metadata Quality in Crossref

Introduction: Scholarly research spans multiple languages, making multilingual metadata crucial for organizing and accessing knowledge across linguistic boundaries. These multilingual metadata already exist and are propagated throughout scholarly publishing infrastructure, but the extent to which they are correctly recorded, or how they affect metadata quality more broadly is little understood. Methods: Our study quantifies the prevalence of multilingual records across a sample of publisher metadata and offers an understanding of their completeness, quality, and alignment with metadata standards. Utilizing the Crossref API to generate a random sample of 519,665 journal article records, we categorize each record into four distinct language types: English monolingual, non-English monolingual, multilingual, and uncategorized. We then investigate the prevalence of programmatically-detectable errors and the prevalence of multilingual records within the sample to determine whether multilingualism influences the quality of article metadata. Results: We find that English-only records are still in the vast majority among metadata found in Crossref, but that, while non-English and multilingual records present unique challenges, they are not a source of significant metadata quality issues and, in few instances, are more complete or correct than English monolingual records. Discussion & Conclusion: Our findings contribute to discussions surrounding multilingualism in scholarly communication, serving as a resource for researchers, publishers, and information professionals seeking to enhance the global dissemination of knowledge and foster inclusivity in the academic landscape.

From Albums to Streams: How Modularity Changes Systems

Scientific publishing is breaking under document-centric formats designed for a physical world. Borrowing from music’s shift from albums to streaming, we make the case that open access alone cannot deliver reuse, trust, or scale. The future of science depends on modular, interoperable research components that move across tools, enabling new workflows, tools, and ecosystems.

The Research Nexus vision for a more connected scholarly community

Crossref envisions “a rich and reusable open network of relationships connecting research organizations, people, things, and actions; a scholarly record that the global community can build on forever, for the benefit of society”. This Research Nexus expands on the importance of research objects being persistently and uniquely identified. The scholarly community has an established practice of connecting things such as citations to others’ work and it is increasingly critical to identify relationships beyond citations, bringing together published work, unpublished work, institutions, individuals, and identifying the actions that they take e.g., funding, publishing, creating, modifying, citing, and sharing. The Research Nexus brings together metadata and relationships to build a joined-up picture of the scholarly ecosystem and helps everyone identify these relationships and how they change through time. This vision is possible if all parts of the scholarly ecosystem (and beyond) work together, including various scholarly infrastructure organizations.

The strain on scientific publishing

Scientists are increasingly overwhelmed by the volume of articles being published. Total articles indexed in Scopus and Web of Science have grown exponentially in recent years; in 2022 the article total was approximately ~47% higher than in 2016, which has outpaced the limited growth - if any - in the number of practising scientists. Thus, publication workload per scientist (writing, reviewing, editing) has increased dramatically. We define this problem as the strain on scientific publishing. To analyse this strain, we present five data-driven metrics showing publisher growth, processing times, and citation behaviours. We draw these data from web scrapes, requests for data from publishers, and material that is freely available through publisher websites. Our findings are based on millions of papers produced by leading academic publishers. We find specific groups have disproportionately grown in their articles published per year, contributing to this strain. Some publishers enabled this growth by adopting a strategy of hosting special issues, which publish articles with reduced turnaround times. Given pressures on researchers to publish or perish to be competitive for funding applications, this strain was likely amplified by these offers to publish more articles. We also observed widespread year-over-year inflation of journal impact factors coinciding with this strain, which risks confusing quality signals. Such exponential growth cannot be sustained. The metrics we define here should enable this evolving conversation to reach actionable solutions to address the strain on scientific publishing.

SemRepo: A Knowledge Graph for Research Software and Its Scholarly Ecosystem

We present SemRepo, an RDF knowledge graph comprising over 81 million triples describing nearly 200,000 GitHub repositories associated with scientific research. SemRepo captures repository-level metadata, such as contributors, issues, and programming languages, and interlinks this information with external scholarly knowledge graphs. In particular, repository authors are linked to their profiles in SemOpenAlex, repositories are connected to scholarly publications in LPWC, and research artifacts, such as datasets and experiments, are linked via MLSea-KG. This integration enables queries that span publications and their scholarly artifacts, which are typically fragmented across separate platforms. SemRepo supports analyses that are difficult to perform with existing resources in isolation, including provenance reconstruction across repositories and publications, as well as the systematic identification of risks to research reproducibility and software sustainability. By unifying research software with its scholarly context in a single graph, SemRepo provides an important infrastructure for large-scale analysis of software within the broader scientific research ecosystem.

The Dissemination of Scholarly Information: Journals, Open-Access and Distributed Filtering

Current methods of disseminating scholarly information focus on the use of journals who retain exclusive rights in the material they publish. Recently there has been increasing dissatisfaction with this model, with suggestions for alternative approaches such as "Open Access".

Schema 5.5 now available: adding CRediT, new record types for blogs and posters, and more - Crossref

Research is rarely limited to a single contributor performing a single role. Behind every research output are people contributing in various ways: software development, data analyses, methodology design, and much more. Often, the same person contributes in several of these ways. Until now, Crossref metadata could only capture part of that picture, but this is changing with Schema 5.5.

Reclaiming scientific publishing: Our duty to make science freely accessible to all

When we (Camille Thomas and Romain Vaucher speaking) entered academia as graduate students in France and Switzerland, we were enthusiastic about the vast amount of research available with a simple click on our university computers. However, we also quickly felt disheartened by the significant amount of research work we couldn’t access when wrapping up our theses from home. Luckily, pirates existed. Empowered by Aaron Swartz’s Guerilla Open Access Manifesto, Alexandra Elbakyan created Sci-Hub in 2011, the greatest leak of scientific knowledge of the century. We felt right in the middle of an Open Access (OA) revolution that would finally make all scientific articles, old and new, accessible to everyone. Fifteen years later, our hopes as idealistic early-career researchers have been crushed by the oligopolistic model of scientific publishing and the subtle pressures of the “publish or perish” culture that reigns over our career development. In the meantime, publishers like Frontiers, MDPI and Springer Nature, to name a few, have exponentially expanded their number of titles. They have become increasingly exploitative of scholarly manpower, moving far away from the genuine accessibility they allegedly promised under the guise of this OA transformation. Open Access is to be praised, but the way it has been implemented through the mainstream Gold and Green OA models now primarily serves the status quo of large for-profit publishers. These entities hijack public money and voluntary editorial labour for their own profit and that of their shareholders (Butler et al., 2023; Shu and Larivière, 2024). In a nutshell, to offer reader accessibility, the Gold OA model requires authors to pay an Article Processing Charge (APC; around 2,000 $/€, rarely less, and often much more) covered by individual research funds, funding agencies or university library deals. The Green OA model allows authors to upload their accepted, non-formatted manuscripts to repositories after an embargo period. While both models allow compliance with funding agency mandates, true equity and accessibility are ultimately left behind. In an article we recently published (Vaucher and Thomas, 2026), we describe the mechanisms through which we, as researchers, inadvertently contribute to keeping research exclusive while driving the publishing model down an unsustainable path. Just like our broader economy, our publishing model and the ways science is evaluated fuelled a predatory system that demands more papers, funding and prestige at an ever-faster rate (Walter and Mullins, 2019), likely at the expense of quality, diversity and ethics (Frank et al., 2023; Heen and Vogt, 2024). These concerns aren’t entirely new. What is new, however, is the growing realisation among societies, universities and funding bodies that we must move away from this system. Initiatives like the European Diamond Capacity Hub, ALMASI and craft-OA are actively paving a way forward that we, as scientists, have yet to fully embrace. In the geosciences, a collective and concerted effort is currently being made by researchers to provide fairer, more sustainable alternatives through community-driven Diamond OA journals (which feature no APCs and completely free access to published articles). Volcanica (Farquharson and Wadsworth, 2018), Sedimentologika (Thomas et al., 2023), Tektonika (Fernández-Blanco et al., 2023), Seismica (Rowe et al., 2022), Geomorphica (Lefebvre et al., 2025), Open Paleontology (Drage et al., 2024), Advances in Geochemistry and Cosmochemistry (Pourret et al., 2025), Geodynamica, jSEDI and Planetary Research are all recently created, scholarly-run journals funded by university library investments to promote better ways of publishing. Their articles are peer-reviewed, free for readers to access, and free for authors to publish. They rely entirely on the voluntary involvement of scientists running open-source editorial platforms (such as Open Journal Systems), transparent workflows, copyediting, production and final dissemination. Diamond OA journals offer an alternative path for all of us to transform our broken publishing system and reclaim ownership of our own science. These efforts go hand in hand with greater involvement in our academic societies and non-profit publishing initiatives. Ultimately, real transformation can only happen if all of us as researchers realise how inherently unfair and exclusive the current system is to labs and institutions that cannot afford steep Gold OA APCs or paywalled journal subscriptions. It also means we must collectively stop evaluating science based on journal prestige and the flawed metrics they own (Posada and Chen, 2018; Sabel and Larhammar, 2025; Simons, 2008). Only by breaking these habits can we truly make knowledge accessible to all.   References Butler, L.-A., Matthias, L., Simard, M.-A., Mongeon, P., and Haustein, S.: The oligopoly’s shift to open access: How the big five academic publishers profit from article processing charges, Quantitative Science Studies, 4, 778–799, https://doi.org/10.1162/qss_a_00272, 2023. Drage, H. B., Keating, J. N., Nielsen, M. L., Saleh, F., and Hearing, T. W. W.: Open Palaeontology: a new model of diamond open access journal for palaeontology, Open Palaeontology, 1, 1–6, https://doi.org/10.26034/la.opal.2024.6223, 2024. Farquharson, J. I. and Wadsworth, F. B.: Introducing Volcanica: The first diamond open-access journal for volcanology, Volcanica, 1, I–IX, https://doi.org/10.30909/vol.01.01.i-ix, 2018. Fernández-Blanco, D., Lacassin, R., Gouiza, M., Perez-Diaz, L., Magee, C., McCarthy, D., Doré, T., Péron-Pinvidic, G., Kavanagh, J., Bond, C., and Schmitt, R.: Tektonika: The Community-Led Diamond Open-Access Journal for Tectonics and Structural Geology, τeκτoniκa, 1, I–XIII, https://doi.org/10.55575/tektonika2023.1.1.56, 2023. Frank, J., Foster, R., and Pagliari, C.: Open access publishing – noble intention, flawed reality, Social Science & Medicine, 317, 115592, https://doi.org/10.1016/j.socscimed.2022.115592, 2023. Heen, E. and Vogt, H.: Scientific rot: Unsustainable publishing practices threatens trust in medicine, Journal of Evaluation in Clinical Practice, 30, 941–944, https://doi.org/10.1111/jep.13989, 2024. Lefebvre, A., Bosch, R., Burrows, K., Giaime, M., Goodwin, G., Lai, L. S.-H., Stammler, M., and Fernández, R.: Geomorphica: The most accessible journal for the geomorphology community, Geomorphica, 1, https://doi.org/10.59236/geomorphica.v1i1.54, 2025. Posada, A. and Chen, G.: Inequality in Knowledge Production: The Integration of Academic Infrastructure by Big Publishers, in: ELPUB 2018, https://doi.org/10.4000/proceedings.elpub.2018.30, 2018. Pourret, O., Millet, M.-A., Marin-Carbonne, J., Mallik, A., Tierney, J. E., Darling, J. R., Kiseeva, E. S., Torres, M. A., Fonseca, R. O. C., Tartèse, R., Namur, O., Klöcking, M., Matthews, S. W., Dahrén, B., Ickert, R. B., and Board,  the inaugural A. in G. and C. editorial: Equitable Access, Open Science, and the Future of Publishing in Geochemistry and Cosmochemistry, Advances in Geochemistry and Cosmochemistry, 1, https://doi.org/10.33063/agc.v1i1.770, 2025. Rowe, C., Agius, M., Convers, J., Funning, G., Galasso, C., Hicks, S., Huynh, T., Lange, J., Lecocq, T., Mark, H., Okuwaki, R., Ragon, T., Rychert, C., Teplitzky, S., and Van den Ende, M.: The launch of Seismica: a seismic shift in publishing, Seismica, 1, https://doi.org/10.26443/seismica.v1i1.255, 2022. Sabel, B. and Larhammar, D.: Reformation of science publishing: the Stockholm Declaration, R Soc Open Sci., 12, 251805, https://doi.org/10.1098/rsos.251805, 2025. Shu, F. and Larivière, V.: The oligopoly of open access publishing, Scientometrics, 129, 519–536, https://doi.org/10.1007/s11192-023-04876-2, 2024. Simons, K.: The Misused Impact Factor, Science, 322, 165–165, https://doi.org/10.1126/science.1165316, 2008. Thomas, C., Privat, A., Vaucher, R., Spychala, Y., Zuchuat, V., Marchegiano, M., Poyatos-Moré, M., Kane, I., and Chiarella, D.: Sedimentologika: a community-driven diamond open access journal in sedimentology, Sedimentologika, 2023. Vaucher, R. and Thomas, C.: Diamond is the new Green—Why Green Open Access is not a sustainable long-term model for scientific publishing, Sedimentologika, 4, https://doi.org/10.57035/journals/sdk.2026.e41.2397, 2026. Walter, P. and Mullins, D.: From symbiont to parasite: the evolution of for-profit science publishing, Molecular Biology of the Cell, https://doi.org/https://doi.org/10.1091/mbc.E19-03-0147, 2019.  

OME Project — open-metadata-exchange documentation

OME enables open educational resources to create, publish, and update their metadata on a peer-to-peer network. By solving authoring, publishing, and discovery issues, this network will provide broad visibility to current islands of OER information.

Current market rates for scholarly publishing services

For decades, the supra-inflation increase of subscription prices for scholarly journals has concerned scholarly institutions. After years of fruitless efforts to solve this “serials crisis”, open access has been proposed as the latest potential solution. However, also the prices for open access publishing are high and are rising well beyond inflation. What has been missing from the public discussion so far is a quantitative approach to determine the actual costs of efficiently publishing a scholarly article using state-of-the-art technologies, such that informed decisions can be made as to appropriate price levels. Here we provide a granular, step-by-step calculation of the costs associated with publishing primary research articles, from submission, through peer-review, to publication, indexing and archiving. We find that these costs range from less than US$200 per article in modern, large scale publishing platforms using post-publication peer-review, to about US$1,000 per article in prestigious journals with rejection rates exceeding 90%. The publication costs for a representative scholarly article today come to lie at around US$400. These results appear uncontroversial as they not only match previous data using different methodologies, but also conform to the costs that many publishers have openly or privately shared. We discuss the numerous additional non-publication items that make up the difference between these publication costs and final price at the more expensive, legacy publishers.

Current market rates for scholarly publishing services

For decades, the supra-inflation increase of subscription prices for scholarly journals has concerned scholarly institutions. After years of fruitless efforts to solve this “serials crisis”, open access has been proposed as the latest potential solution. However, also the prices for open access publishing are high and are rising well beyond inflation. What has been missing from the public discussion so far is a quantitative approach to determine the actual costs of efficiently publishing a scholarly article using state-of-the-art technologies, such that informed decisions can be made as to appropriate price levels. Here we provide a granular, step-by-step calculation of the costs associated with publishing primary research articles, from submission, through peer-review, to publication, indexing and archiving. We find that these costs range from less than US$200 per article in modern, large scale publishing platforms using post-publication peer-review, to about US$1,000 per article in prestigious journals with rejection rates exceeding 90%. The publication costs for a representative scholarly article today come to lie at around US$400. These results appear uncontroversial as they not only match previous data using different methodologies, but also conform to the costs that many publishers have openly or privately shared. We discuss the numerous additional non-publication items that make up the difference between these publication costs and final price at the more expensive, legacy publishers.

How Grobid uses Crossref metadata to enrich bibliographic information - Crossref | Luca F.

Early this year Crossref and I talked about how Grobid users rely on their API, and the numbers are big: in Q1 2026 alone, GROBID clients sent more than 100 million requests to consolidate extracted bibliographic data. Crossref offers three tiers: public (anonymous, low throughput), polite (identified by email, higher throughput) and Metadata Plus (paid, for large-scale use). GROBID’s integration dated back to 2014, and it turned out it needed an update. Since 0.9.0, GROBID lets you join the polite pool or use your Metadata Plus key. Consolidation is more reliable, and it’s fairer to a shared, open service. Luis M. Montilla and I had a conversation about how Grobid uses the Crossref metadata to enrich references extracted from PDFs, that eventually become a blog post: 🔗 https://lnkd.in/egxWRAV6 And there’s a next step: for really large volumes, a local service may be more suitable than the API. On 22 October at 15:15 UTC, I’ll present biblio-glutton in the Community Highlights session of the Crossref Annual Meeting. Biblio-glutton is a local metadata search service for scholary publications using the Crossref public dump and data from other services: Pubmed, HAL, OpenAlex, etc... I built with Patrice Lopez in 2016. It provides provide lookup, structured, and unstructured metadata search. The owners of the Crossref Metadata Plus subscription can keep it in sync with regular background jobs so the data is kept up-to-date. 🔗 Annual Meeting (online, free; register for Session 2): https://lnkd.in/ew699KCw 🔗 biblio-glutton: https://lnkd.in/eR6KvmJM

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