Initiative for Open Abstracts

The Initiative for Open Abstracts (I4OA) is a collaboration between scholarly publishers, infrastructure organizations, librarians, researchers and other interested parties to advocate and promote the unrestricted availability of the abstracts of the world’s scholarly publications, particularly journal articles and book chapters, in trusted repositories where they are open and machine-accessible. I4OA calls on all scholarly publishers to open the abstracts of their published works, and where possible to submit them to Crossref.

Open Preprint Systems

A “preprint” is a research paper that authors have chosen to make freely available online while still in draft form and through multiple versions, with the rise of preprints representing another element in the broader move toward open science.

Open Preprint Systems (OPS) is an open source preprint server for managing the posting of research papers. Authors, after registering with the system and being approved by the Preprint Manager, can share their research as preprints, whether as PDFs, or Word documents. The posted papers are then made freely available online to be downloaded and indexed by Google Scholar.

OPS Features

OPS is built using the same framework as Open Journal Systems (OJS) and so shares the majority of its code base. OPS can be downloaded, for free, by any interested party and installed on a local webserver. Capacities and features of the beta release including the following:

  • Responsive reader front-end with multiple options for content organization
  • Author-led rapid publication workflow
  • Online submission and management of all content
  • Customizable to suit your screening policies, with several options included
  • Integrated with scholarly publishing services such as Crossref and ORCiD
  • Locally installed and controlled
  • Community-led and supported
  • Built-in support for a wide array of features from the OJS and OMP ecosystem
  • Available in English, Spanish, and Portuguese, with more languages to come


Preprints is a platform dedicated to making early versions of research outputs permanently available and citable. We post original research articles and comprehensive reviews, and papers can be updated by authors at any time. Content on Preprints is not peer-reviewed and can receive feedback from readers.

For authors intending to submit, please read the How it Works and Instruction for Authors pages. The majority of research journals allow authors to post on preprint servers such as Preprints prior to publication (see Preprints and Publishing in Peer-Reviewed Journals.

You can search our preprints using our search page, or check the latest preprints from your field. Log in to set up alerts for the newest preprints, or get involved by screening submitted preprints.

Why post with

We believe in fast dissemination of research. Our simple, quick process ensures that others can read your work as soon as possible. Preprints has the following features:

Multidisciplinary: We cover all research disciplines, you can see the research categories here.

Open access: All preprints are posted with a Creative Commons CC BY 4.0 license, ensuring that authors retain copyright and receive credit for their work, while allowing anyone to read and reuse their work.

Citation via Crossref DOI: For each preprint, authors can choose to register a unique digital object identifier issued by Crossref. This makes them instantly citable and provides a permanent link to the article, even if the URL on our platform changes. New versions of preprints receive a different DOI.

Comment on any article: Authors can receive public or private feedback from readers directly from the preprint abstract page.

Simple submission process: Submitting a preprint only requires basic information, our team of editors will do the rest and post your preprint as soon as possible.

Advancing Public Access to Research (CHORUS)

By providing the necessary metadata infrastructure and governance to enable a smooth, low-friction interface between funders, authors, institutions and publishers in a distributed network environment, CHORUS can minimize open access compliance burdens while increasing access to literature and data in support of funder mandates worldwide.

The first initiative of CHOR, Inc., a US 501(c)(3) nonprofit organization, CHORUS leverages widely used technology to facilitate a simple compliance process, optimized search and dashboard services, and multi-party archiving and preservation capabilities.

Powered by the Crossref Open Funder Registry and other open technologies, CHORUS is interoperable with other open access and public access delivery solutions, agency search portals, publisher platforms, and scholarly repositories and archives. Built on proven infrastructure, CHORUS minimizes costs to publishers, overheads for funders, and administrative burden for authors.

More than 50 publishers – who collectively publish the vast majority of articles reporting on publicly funded research – have joined CHORUS. New articles are continuously added and freely accessible to the public on the publishers’ sites, either immediately on publication or after a designated embargo period.

This streamlined and cost-effective approach delivers value to funders, publishers, researchers, institutions, and the public at each point in the process of enabling open access:

IDENTIFICATION: Simply naming the funding source during the article submission process adds metadata from the Crossref Open Funder Registry, which triggers open access to the article. This easy step minimizes the time researchers have to spend on administrative tasks.
DISCOVERY: Users can quickly find the latest research articles via agency portals and common search engines, as well as through CHORUS’ optimized search application. CHORUS’ open programming and interface invites innovators to develop new tools and functionality that further support open access and facilitates text/data mining on funded research.
ACCESS: CHORUS points users to the best available version of articles on their publication sites, where they can find essential context, tools, and information, either immediately on publication or after an embargo period.
COMPLIANCE: Compliance is easy using simple tagging built into the article submission process, while a CHORUS dashboard application facilitates monitoring and reporting by funders and publishers without adding unnecessary costs and administrative overhead.
PRESERVATION: CHORUS ensures the integrity and sustainability of the scholarly record through partnerships with CLOCKSS, Portico, and other services that archive and preserve research articles in perpetuity.


Plaudit: open endorsements by the academic community.

Plaudit is a simple, light-weight mechanism that allows an individual with an ORCID to endorse an object with a DOI.

Plaudit is based on the open infrastructure integrated with DOIs, Crossref Event Data and ORCIDs: nonprofit and community-driven.

Plaudit is independent of publisher platform.

OpenAIRE’s DOIBoost

OpenAIRE’s DOIBoost – Boosting CrossRef for Research

Research in information science and scholarly communication strongly relies on the availability of openly accessible datasets of scholarly entities metadata and, where possible, their relative payloads. Since such metadata information is scattered across diverse, freely accessible, online resources (e.g. CrossRef, ORCID), researchers in this domain are doomed to struggle with metadata integration problems, in order to produce custom datasets of undocumented and rather obscure provenance. This practice leads to waste of time, duplication of efforts, and typically infringes open science best practices of transparency and reproducibility of science. In this article, we describe how to generate DOIBoost, a metadata collection that enriches CrossRef (Nov 2018) with inputs from Microsoft Academic Graph (May 2018), ORCID (Oct 2018), and Unpaywall (Jun 2018) for the purpose of supporting high-quality and robust research experiments, saving times to researchers and enabling their comparison. To this aim, we describe the dataset value and its schema, analyse its actual content, and share the software Toolkit and experimental workflow required to reproduce it. The DOIBoost dataset and Software Toolkit are made openly available via DOIBoost will become an input source to the OpenAIRE information graph.