About POSI

What POSI provides

• Publication search across more than 300 million works, with citation export and open access links.
• A journal directory of every indexed journal, with a profile page for each: identifiers, output and citations per year, subject, topics and ranking.
• The Core Collection: journals that applied for certification and passed editorial evaluation.
• Journal rankings by PNCI within subject categories, with citation ranks, percentiles, Citation Quartiles (C-Q1 to C-Q4) and POSI Zones.
• Certificates of indexing for authors, verifiable by anyone.
• Data downloads of the directory, rankings and records.

Coverage

POSI indexes journals, not individual submissions. A journal is included when it has an ISSN and is registered with Crossref or described by OpenAlex. Indexed journals appear in the directory and, when their citation data meet the minimum requirements, in the Citation Rankings. The Core Collection is a separate tier that a journal enters only by applying for certification. The rules are set out in the editorial policy.

Metadata is taken from Crossref and OpenAlex and refreshed daily. The Citation Ranking is published once a year, each December, and AJR ratings of Core Collection journals are re-rated every month, both under a versioned methodology described in methodology.

Independence

POSI is independent of Web of Science, Scopus and DOAJ. Listing in those or any other services does not determine inclusion in POSI, admission to the Core Collection, or any score or ranking. Rankings are produced by versioned calculation code. No publisher, editor, sponsor or member of staff can change a published result by hand.

Conflict of interest

Panorama Scholarly Group Ltd. publishes POSI and also publishes journals. 13 of the 30 Core Collection journals are published by Panorama Scholarly Group. These journals are evaluated under the same criteria as every other journal. Readers should take this relationship into account. The affected journals are listed in the conflict of interest disclosure.

Licensing

POSI is open source. POSI data is published under CC BY 4.0 and the software under the MIT License. Third-party metadata keeps its original license: OpenAlex data is CC0, and Crossref metadata is provided without restriction.

Publisher

Enquiries are acknowledged within two to three business days. Certification reviews take ten to twenty business days. See contact for the right subject line for each request.

Appropriate use

Journal rankings describe journals, not the quality of individual articles or researchers. They should not be the sole basis for hiring, promotion or funding decisions. See responsible use.