Latest blog posts
Amanda Bartell
2022 September 22

What is our role in preserving the integrity of the scholarly record?

The integrity of the scholarly record is an essential aspect of research integrity. Every initiative and service that we have launched since our founding has been focused on documenting and clarifying the scholarly record in an open, machine-actionable and scalable form. All of this has been done to make it easier for the community to assess the trustworthiness of scholarly outputs. Now that the scholarly record itself has evolved beyond the published outputs at the end of the research process – to include both the elements of that process and its aftermath – preserving its integrity poses new challenges that we strive to meet.

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Lucy Ofiesh
2022 September 16

2022 Board Election

I’m pleased to share the 2022 board election slate. Crossref’s Nominating Committee received 40 submissions from members worldwide to fill five open board seats. We maintain a balance of eight large member seats and eight small member seats. A member’s size is determined based on the membership fee tier they pay. We look at how our total revenue is generated across the membership tiers and split it down the middle. Like last year, about half of our revenue came from members in the tiers $0 - $1,650, and the other half came from members in tiers $3,900 - $50,000.

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Jennifer Kemp
2022 September 06

Accessibility for Crossref DOI Links: Call for comments on proposed new guidelines

Our entire community – members, metadata users, service providers, community organizations and researchers – create and/or use DOIs in some way so making them more accessible is a worthy and overdue effort. For the first time in five years and only the second time ever, we are recommending some changes to our DOI display guidelines (the changes aren’t really for display but more on that below). We don’t take such changes lightly, because we know it means updating established workflows.

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Geoffrey Bilder
2022 August 26

Martin Paul Eve is joining our R&D group as a Principal Developer

I’m delighted to say that Martin Paul Eve will be joining Crossref as a Principal R&D Developer starting in January 2023. As a Professor of Literature, Technology, and Publishing at Birkbeck, University of London- Martin has always worked on issues relating to metadata and scholarly infrastructure. In joining the Crossref R&D group, Martin can focus full-time on helping us design and build a new generation of services and tools to help the research community navigate and make sense of the scholarly record.

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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