Crossref

Index

Is it read

This source is read.

On what basis it is read

Why anything from this source may be held at all, where that can be re-checked, what we altered, and how to reach the live record.

On what basis it is read: Bibliographic facts (CC0)
Where the basis can be re-checked: https://www.crossref.org/documentation/retrieve-metadata/rest-api/ — Crossref distributes its bibliographic metadata under CC0 1.0. Abstracts deposited by publishers are not covered by that waiver.
How the source must be credited: Bibliographic metadata from Crossref, distributed under CC0 1.0.
What we changed: We hold the bibliographic fields and relations listed here, normalise dates and author names into this programme's own shape and record the date we processed them. Deposited abstracts are not held. Every record resolves through its DOI to the publisher's live page, which is authoritative.
The live record: https://doi.org/{id}
Written down in advance: 2026-09-16 05:19:15.438784+00

This source publishes terms rather than signing agreements, so there is no contract and none is claimed.

What may be held

Exactly these fields, and nothing else. A field the source sends that is not listed here is not kept.

message.items[].author[] — Bibliographic fact
message.items[].container-title[] — Bibliographic fact
message.items[].DOI — Bibliographic fact
message.items[].is-referenced-by-count — Bibliographic fact
message.items[].issued.date-parts[] — Bibliographic fact
message.items[].license[] — Bibliographic fact
message.items[].title[] — Bibliographic fact
message.items[].type — Bibliographic fact
message.total-results — Bibliographic fact
message.items[].funder[] — Bibliographic relation
message.items[].reference[] — Bibliographic relation
message.items[].update-to[] — Bibliographic relation

The agreed shape of an answer

Identifier it speaks: DOI
Agreed shape (fingerprint): c9d186d76326acb6abc823cbabd1e7f1efac53a12ba683663c10ccb81746ca94
Contract version: 3
Basis for holding anything: Crossref distributes bibliographic metadata under CC0. Deposited abstracts remain under publisher terms, which are not uniform, so no abstract text is stored. Provisional reading, needs legal confirmation.
Where the basis can be re-checked: No dataNothing has been recorded here yet. This is not a zero.
Written down in advance: 2026-09-16 05:19:15.246468+00

What it may speak to

With the rank it holds when sources disagree, and why.

Publication record — An index copies the publication record accurately and is not its origin; it may lag a correction by the publisher.
Retraction — Indexes carry retraction flags reliably and receive them second-hand.

What it may not assert

Nothing is refused to this kind of source.

This map holds only what has been read and checked against a source, and nothing has been recorded for this section. Empty here means exactly that — not zero, and not a fault in the page.

What it attests

0 attestations stand on this source

See where the sources disagree