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.

...Find out more
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

Metadata removal markup guide

For most metadata elements, you can just update the record to delete elements. However, if you are sending us XML, there are some non-bibliographic metadata elements where you have to go through a two-stage process - firstly send us a submission to delete this element, and then send us a further submission to add in the replacement data.

Metadata that needs to be explicitly deleted includes:

You can also delete non-bibliographic metadata by supplying an empty parent element (see examples below), and include it in a metadata update or submit it as a resource-only deposit. Note that metadata submitted as part of a Crossmark update needs to be removed within Crossmark metadata (see examples below).

Remove all Crossmark data

Remove all Crossmark data from a record by supplying an empty Crossmark element in a metadata deposit:

<first_page>1</first_page>
  <last_page>3</last_page>
</pages>
<crossmark/>
<doi_data>
   <doi>10.5555/12345678</doi>
   <resource>http://0-psychoceramics-labs-crossref-org.libus.csd.mu.edu/10.5555-12345678.html</resource>
</doi_data>

or as part of a resource-only deposit:

<crossmark_data>
  <doi>10.5555/12345678</doi>
  <crossmark/>
</crossmark_data>

Remove funding, clinical trial, or license data from Crossmark

Funding, license, and clinical trial data may all be supplied as part of a Crossmark update. If you need to remove funding, license, or clinical trial metadata from your Crossmark metadata, you must submit the appropriate empty element within a Crossmark update. Note the other Crossmark metadata must be present as well to be retained.

In this example, funding data is removed from a Crossmark update:

<crossmark>
  <crossmark_version>1</crossmark_version>
  <crossmark_policy>10.5555/crossmark_policy</crossmark_policy>
  <crossmark_domains>
    <crossmark_domain>
      <domain>psychoceramics.labs.crossref.org</domain>
    </crossmark_domain>
  </crossmark_domains>
  <crossmark_domain_exclusive>true</crossmark_domain_exclusive>
  <custom_metadata>
    <assertion name="orcid" label="ORCID" group_name="identifiers" group_label="Identifiers" order="0" href="http\://orcid.org/0000-0002-1825-0097">http\://orcid.org/0000-0002-1825-0097</assertion>
    <assertion name="received" label="Received" group_name="publication_history" group_label="Publication History" order="0">2012-07-24</assertion>
    <assertion name="accepted" label="Accepted" group_name="publication_history" group_label="Publication History" order="1">2012-08-29</assertion>
    <assertion name="published" label="Published" group_name="publication_history" group_label="Publication History" order="2">2012-09-10</assertion>
    <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/fundref.xsd"/>
    <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/AccessIndicators.xsd"/>
    <program "https://0-www-crossref-org.libus.csd.mu.edu/clinicaltrials.xsd"/>
</custom_metadata>
</crossmark>

Remove funding data

Remove funding data from a non-Crossmark record by supplying an empty fundref program element in a metadata deposit:

<first_page>1</first_page>
  <last_page>3</last_page>
</pages>
<program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/fundref.xsd"/>
<doi_data>
   <doi>10.5555/12345678</doi>
   <resource>http://0-psychoceramics-labs-crossref-org.libus.csd.mu.edu/10.5555-12345678.html</resource>
</doi_data>

or as part of a resource-only deposit:

<fundref_data>
  <doi>10.5555/12345678</doi>
 <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/fundref.xsd"/>
</fundref_data>

Remove license data

Remove license data from a non-Crossmark record by supplying an empty AccessIndicators program element in a metadata deposit:

<first_page>1</first_page>
  <last_page>3</last_page>
</pages>
<program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/AccessIndicators.xsd"/>
<doi_data>
   <doi>10.5555/12345678</doi>
   <resource>http://0-psychoceramics-labs-crossref-org.libus.csd.mu.edu/10.5555-12345678.html</resource>
</doi_data>

or as part of a resource-only deposit:

<lic_ref_data>
  <doi>10.5555/12345678</doi>
 <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/AccessIndicators.xsd"/>
</lic_ref_data>

Remove relationship data

Remove relationship data by supplying an empty relationship program element in a metadata deposit:

<first_page>1</first_page>
  <last_page>3</last_page>
</pages>
<program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/relations.xsd"/>
<doi_data>
   <doi>10.5555/12345678</doi>
   <resource>http://0-psychoceramics-labs-crossref-org.libus.csd.mu.edu/10.5555-12345678.html</resource>
</doi_data>

or as part of a resource-only deposit:

<doi_relations>
  <doi>10.5555/12345678</doi>
 <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/relations.xsd"/>
</doi_relations>

Remove text and data mining, Similarity Check, and multiple resolution URLs

Text and data mining and multiple resolution secondary URLs may be removed from a record by submitting an update containing an empty collection tag that includes the appropriate property:

  • Text and data mining uses property text-mining
  • Similarity Check URLs use the property crawler-based
  • Multiple resolution secondary URLs use the property list-based
  • The country-code resolution feature uses the property country-based

For example, to remove text and data mining URLs from a record submit the following as part of a metadata deposit:

<doi_data>
  <doi>10.5555/515151</doi>
  <resource>http://0-annalsofpsychoceramics-labs-crossref-org.libus.csd.mu.edu/abstract/515151/</resource>
  <collection property="text-mining"/>
</doi_data>

They may be included in a metadata deposit (above) or as part of a resource-only deposit:

<doi_resources>
  <doi>10.5555/515151</doi>
  <collection property="text-mining"/>
</doi_resources>

Remove references

Remove a reference list from a record by supplying an empty citation_list element in a metadata deposit:

<first_page>1</first_page>
  <last_page>3</last_page>
</pages>
<doi_data>
   <doi>10.5555/12345678</doi>
   <resource>http://0-psychoceramics-labs-crossref-org.libus.csd.mu.edu/10.5555-12345678.html</resource>
</doi_data>
<citation_list/>

or as part of a resource-only deposit:

<doi_citations>
  <doi>10.5555/12345678</doi>
<citation_list/>
</doi_citations>

Page owner: Isaac Farley   |   Last updated 2020-October-06