Latest blog posts
Martyn Rittman
2024 November 15

Research Integrity Roundtable 2024

For the third year in a row, Crossref hosted a roundtable on research integrity prior to the Frankfurt book fair. This year the event looked at Crossmark, our tool to display retractions and other post-publication updates to readers. Since the start of 2024, we have been carrying out a consultation on Crossmark, gathering feedback and input from a range of members. The roundtable discussion was a chance to check and refine some of the conclusions we’ve come to, and gather more suggestions on the way forward.

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Dominika Tkaczyk
2024 November 06

How good is your matching?

In our previous blog post in this series, we explained why no metadata matching strategy can return perfect results. Thankfully, however, this does not mean that it’s impossible to know anything about the quality of matching. Indeed, we can (and should!) measure how close (or far) we are from achieving perfection with our matching. Read on to learn how this can be done! How about we start with a quiz? Imagine a database of scholarly metadata that needs to be enriched with identifiers, such as ORCIDs or ROR IDs.

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Kornelia Korzec
2024 October 28

Update on the Resourcing Crossref for Future Sustainability research

We’re in year two of the Resourcing Crossref for Future Sustainability (RCFS) research. This report provides an update on progress to date, specifically on research we’ve conducted to better understand the impact of our fees and possible changes. Crossref is in a good financial position with our current fees, which haven’t increased in 20 years. This project is seeking to future-proof our fees by: Making fees more equitable Simplifying our complex fee schedule Rebalancing revenue sources In order to review all aspects of our fees, we’ve planned five projects to look into specific aspects of our current fees that may need to change to achieve the goals above.

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Lucy Ofiesh
2024 September 24

Meet the candidates and vote in our 2024 Board elections

On behalf of the Nominating Committee, I’m pleased to share the slate of candidates for the 2024 board election. Each year we do an open call for board interest. This year, the Nominating Committee received 53 submissions from members worldwide to fill four open board seats. We maintain a balanced board of 8 large member seats and 8 small member seats. Size is determined based on the organization’s membership tier (small members fall in the $0-$1,650 tiers and large members in the $3,900 - $50,000 tiers).

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Documentation

Schema versions

We support several versions of our metadata input and grants schema, as well as XML Schema Definition (XSD) schema for looking up and retrieving DOIs and metadata. A quick reference is available. The metadata input schema is used to deposit metadata for most record types, except Grants, which have their own schema.

We currently support versions 4.3.0 to 5.3.1 of our main metadata schema. If you are beginning to register your metadata with Crossref you should use the most recent version (currently 5.3.1) to ensure you are able to take advantage of all metadata deposit options. We also have a resource-only deposit schema that may be used to add some pieces of metadata to an existing record.

Metadata input schema versioning

All supported schema are available in our Schema GitLab repository. Versions 4.3.0 - 4.8.1 of our schema are backwards-compatible with the exception of deposits for standards, which may only be deposited with version 4.3.6 and above.

We are now incrementing our input schema version numbers with each change for all updates after version 4.4.2. Note that addtional schema versions are available via gitlab (5.0 - 5.2 for example) but are not documented for use as subsequent versions were released at the same time (5.3.1).

Recommended metadata deposit schema

Recommended resource-only deposit schema

Also supported

  • crossref4.8.1.xsd: changes include support for ISBN that begin with 979, changes to the regex for the email_address field, relaxed regex for given_name to allow numbers, and schema refactoring.
  • crossref4.4.2.xsd: adds support for pending publication, distributed usage logging (DUL), multiple dissertation authors, abstracts for all record types, support for JATS 1.2 abstracts, and adds acceptance_date element to journal article, book, book chapter, and conference papers
  • crossref4.4.1.xsd: adds support for peer reviews
  • crossref4.4.0.xsd: adds support for posted content (includes preprints)
  • crossref4.3.7.xsd: adds support for linked clinical trials, journal deposits without ISSNs
  • crossref4.3.6.xsd: expanded support for standards
  • crossref4.3.5.xsd: supports relationships between DOIs and other objects
  • crossref4.3.4.xsd: add archive_location option, change name element to depositor_name
  • crossref4.3.3.xsd: modifications for standards
  • crossref4.3.2.xsd: adds support for license metadata
  • crossref4.3.1.xsd: adds support for Crossmark, funding data, ORCID iDs
  • crossref4.3.0.xsd: revisions to handling of books
  • doi_resources4.3.6.xsd
  • doi_resources4.3.5.xsd
  • doi_resources4.3.4.xsd
  • doi_resources4.3.2.xsd
  • doi_resources4.3.0.xsd

Page owner: Patricia Feeney   |   Last updated 2021-October-05