Latest blog posts
Patrick Polischuk
2022 May 13

2022 public data file of more than 134 million metadata records now available

In 2020 we released our first public data file, something we’ve turned into an annual affair supporting our commitment to the Principles of Open Scholarly Infrastructure (POSI). We’ve just posted the 2022 file, which can now be downloaded via torrent like in years past. We aim to publish these in the first quarter of each year, though as you may notice, we’re a little behind our intended schedule. The reason for this delay was that we wanted to make critical new metadata fields available, including resource URLs and titles with markup.

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Ed Pentz
2022 May 12

Announcing our new Director of Product: Rachael Lammey

Unfortunately, Bryan Vickery has moved onto pastures new. I would like to thank him for his many contributions at Crossref and we all wish him well. I’m now pleased to announce that Rachael Lammey will be Crossref’s new Director of Product starting on Monday, May 16th. Rachael’s skills and experience are perfectly suited for this role. She has been at Crossref since 2012 and has deep knowledge and experience of all things Crossref: our mission; our members; our culture; and our services.

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Fabienne Michaud
2022 May 10

Similarity Check: what’s new with iThenticate v2?

Since we announced last September the launch of a new version of iThenticate, a number of you have upgraded and become familiar with iThenticate v2 and its new and improved features which include: A faster, more user-friendly and responsive interface A preprint exclusion filter, giving users the ability to identify content on preprint servers more easily A new “red flag” feature that signals the detection of hidden text such as text/quotation marks in white font, or suspicious character replacement A private repository available for browser users, allowing them to compare against their previous submissions to identify duplicate submissions within your organisation A content portal, helping users check how much of their own published content has been successfully indexed, self-diagnose and fix the content that has failed to be indexed in iThenticate.

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Vanessa Fairhurst
2022 April 14

Do you want to be a Crossref Ambassador?

A re-cap We kicked off our Ambassador Program in 2018 after consultation with our members, who told us they wanted greater support and representation in their local regions, time zones, and languages. We also recognized that our membership has grown and changed dramatically over recent years and that it is likely to continue to do so. We now have over 16,000 members across 140 countries. As we work to understand what’s to come and ensure that we are meeting the needs of such an expansive community, having trusted local contacts we can work closely with is key to ensuring we are more proactive in engaging with new audiences and supporting existing members.

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Documentation

XSD schema quick reference

We support additional schema (not listed here) for legacy purposes.

Deposit schema

Used for registering and updating DOI metadata records:

Schema Purpose Status Further info
grant_id0.1.1.xsd grant metadata recommended documentation
crossref5.3.1.xsd full metadata deposits recommended documentation
crossref4.8.1.xsd full metadata deposits recommended documentation
crossref4.4.2.xsd full metadata deposits available documentation
AccessIndicators.xsd license data imported
relations.xsd relationships between DOIs and other identifiers imported
clinicaltrials.xsd relationships between publications that report on a clinical trial imported
doi_resources4.4.2.xsd used to append or update specific sets of metadata to an existing record recommended documentation

Query schema

Used for formatting XML queries:

Schema Purpose Further info
Crossref_query_input2.0.xsd used to input XML queries to the system documentation

Metadata retrieval schema

Used for retrieving our metadata:

Schema Purpose Further info
crossref_query_output2.0.xsd returns query results in xsd_xml format, used for Cited-by results documentation
crossref_query_output3.0.xsd returns query results in UNIXSD format documentation
unixref1.1.xsd returns query results in the UNIXML format, also used to support the data delivered by our OAI-PMH service documentation
unixref1.0.xsd returns query results in the UNIXML format for some older content, also used to support the data delivered by our OAI-PMH service documentation
crossref_output3.0.1.xsd used to support data files generated for bulk data distribution documentation
OAI-PMH.cr.xsd accommodates differences between Crossref’s OAI-PMH implementation and the published Open Archives OAI 2.0 schema documentation

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