The Crossref Curriculum

Posted content (includes preprints) markup guide

Prior learning: Introduction to posted content (includes preprints)

This page gives markup examples for members registering posted content (includes preprints) by direct deposit of XML. It is not currently possible to register the posted content (includes preprints) content type using one of our helper tools.

Depositing and updating posted content

Posted content is a Crossref content type available starting with schema version 4.4.0. The schema updates include a number of posted content-specific elements. The top level element is called posted_content and has an attribute called type. This attribute is given a value from an enumerated list that defines the nature of the posted content. The current set of enumerations are:

  • preprint
  • working_paper
  • letter
  • dissertation
  • report
  • other

The default value is preprint. Please contact us if you want to deposit metadata for a posted content type which is not on this list.

Metadata elements

The posted content type contains the following elements (* = required):

Element Description
group_title* The hosting platform may organize its posted content into categories or subject areas. This field is used to name the container for the posted item
contributors* Container for author information
titles* The titles (title and subtitle) of the posted content
posted_date* The date when the posted content became available online on the hosting platform
acceptance_date The date the content item was submitted to and accepted by the hosting platform
institution Container for information about an organization that sponsored or hosted an item but is not the publisher
program: funding Source of funding applicable to research related to the posted content
program: access indicators License terms
program: relations Relationships (other than bibliographic citation) to other works, such as found in acknowledgments or list of supplemental material
doi_data* Container for persistent identifier and URL
citation_list Posted content bibliography listing of citations to other works

Updating metadata with relationship to AAM/VoR

Once a posted content item has been published, the posted content publisher must update their publication metadata with the AAM/VoR DOI using the isPreprintOf relation type.

<program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/relations.xsd">
    <related_item>
         <!--DOI of the AM / VOR-->
         <intra_work_relation relationship-type="isPreprintOf" identifier-type="doi">10.5555/preprint_sample_doi_vor</intra_work_relation>
    </related_item>
</program>

The relationship metadata may be updated with either a full metadata deposit (existing metadata plus the ‘relationship’ metadata) or as a resource-only deposit. Metadata deposited using the resource schema will be appended to the existing metadata.

Posted content and conflicts

When a posted content item is submitted for a published item that has a registered metadata record, a conflict is created. The conflict is resolved when the posted content item is updated with the relationship metadata for the published item’s DOI. Learn more about the conflict report.

Posted content and Cited-by matches

When you query for Cited-by matches, you can choose to include posted content matches in your results. By default, posted content is not included. To retrieve matches including posted content:

HTTPS queries

Add the include_postedcontent=true parameter to your query, for example:

https://0-doi-crossref-org.libus.csd.mu.edu/servlet/getForwardLinks?usr=XXXX&pwd=XXXX&doi=10.5555/12345678&include_postedcontent=true

XML queries

Add the include_postedcontent="true" attribute to your fl_query element, for example:

<?xml version = "1.0" encoding="UTF-8"?>
  <query_batch version="2.0" xmlns = "https://0-www-crossref-org.libus.csd.mu.edu/qschema/2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <head><doi_batch_id>eXtyles Request AMP.dodge0724.doc__76</doi_batch_id>
    </head>
<body>
    <fl_query include_postedcontent="true"><doi>10.5555/12345678</doi></fl_query>
</body>
</query_batch>

Example of a posted content deposit

Review the sample below or download an XML file.

<posted_content>
       	<!--group_title: Prepublication content items may be organized into groupings within a given publisher. This element provides for naming the group. It is expected that publishers will have a small number of groups each of which reflect a topic or subject area. (required)--> 	 
       	<group_title>Metadata Quality</group_title>
       	<contributors>
           	<person_name sequence="first" contributor_role="author">
               	<given_name>Dorothy</given_name>
               	<surname>Depositor</surname>
               	<ORCID>http\://orcid.org/0000-0002-4011-3590</ORCID>
           	</person_name>
       	</contributors>
       	<titles>
           	<title>Mind your &lt; and &gt;: why XML needs to be valid</title>
       	</titles>
       	<!--posted_date: The date when the posted content became available online on the hosting platform (required)-->
       	<posted_date>
           	<month>01</month>
           	<day>15</day>
           	<year>1971</year>
       	</posted_date>
       	<!--acceptance_date: date the content item was submitted to and accepted by the hosting platform. (optional) -->
       	<acceptance_date>
          	<month>01</month>
           	<day>01</day>
           	<year>1971</year>
       	</acceptance_date>
       	<!--optional funding and license data-->
       	<program name="fundref" xmlns="http://0-www.crossref.org.libus.csd.mu.edu/fundref.xsd">
           	<assertion name="fundgroup">
               	<assertion name="funder_name"> U.S. Department of Energy <assertion
                       	name="funder_identifier">100000015</assertion>
               	</assertion>
               	<assertion name="award_number">DE-FG03-03SF22691</assertion>
           	</assertion>
           	<assertion name="fundgroup">
               	<assertion name="funder_name"> U.S. Department of Energy <assertion
                       	name="funder_identifier">100000015</assertion>
               	</assertion>
               	<assertion name="award_number">DE-AC52-06NA27279</assertion>
           	</assertion>
       	</program>
       	<program xmlns="http://0-www.crossref.org.libus.csd.mu.edu/AccessIndicators.xsd">
           	<free_to_read start_date="2016-01-01"/>
           	<license_ref>http://some.co.org/license_page.html</license_ref>
       	</program>
       	<!--DOI and URL (required)-->
       	<doi_data>
           	<doi>10.50505/preprint_sample_doi_1</doi>
           	<resource>http://0-www.crossref.org.libus.csd.mu.edu/index.html</resource>
       	</doi_data>
       	<!--citation list for the item (optional)-->
       	<citation_list>
           	<citation key="pp1">
               	<doi>10.5555/12345678</doi>
           	</citation>
       	</citation_list>
   	</posted_content>

Example of a posted content deposit containing a relationship to a VOR

Review the sample below or download an XML file.

<!-- relationship established with VOR DOI (required when VOR is identified)-->
    <program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/relations.xsd">
       <related_item>
          <intra_work_relation relationship-type="isPreprintOf" identifier-type="doi">10.5555/preprint_sample_doi_vor</intra_work_relation>
       </related_item>
     </program>
           <!--DOI and URL (required)-->
           <doi_data>
               <doi>10.50505/preprint_sample_doi_1</doi>
               <resource>https://0-www-crossref-org.libus.csd.mu.edu/index.html</resource>
           </doi_data>

Example of a journal article deposit that includes a relationship to posted content

Review the sample below or download an XML file.

<publication_date>
   <year>2016</year>
</publication_date>
<!--relationship established with posted content (preprint) DOI-->
<program xmlns="https://0-www-crossref-org.libus.csd.mu.edu/relations.xsd">
   <related_item>
     <intra_work_relation relationship-type="hasPreprint" identifier-type="doi">10.50505/preprint_sample_doi_1</intra_work_relation>
   </related_item>
</program>
               <doi_data>
                   <doi>10.5555/preprint_sample_doi_vor</doi>
                   <resource>https://0-www-crossref-org.libus.csd.mu.edu/index.html</resource>
               </doi_data>

Example of email notification of posted content match

Member Example Publishing has deposited DOI 10.5555/preprint_sample_doi_vor (http://0-doi.org.libus.csd.mu.edu/10.5555/preprint_sample_doi_vor) claiming it is the VoR for your posted content DOI 10.50505/preprint_sample_doi_1. Please display a link to the Version of Record from your posted content online. Linking posted content to the published record is critical to enabling the full history of scholarly results, and ensuring that the citation record is clear and up-to-date. If you have questions please contact support@crossref.org and one of our colleagues (in the EST timezone) will get back to you. Many thanks, Crossref

Page owner: Laura J. Wilkinson   |   Last updated 2020-April-08