The Crossref Curriculum

UNIXSD query output format

UNIXSD query results include member metadata as deposited (as with the UNIXREF format) as well as some Crossref-generated information about the metadata record. UNIXSD is the most comprehensive metadata output format available for our metadata records.

UNIXSD format will return deposited references if the depositing member has enabled reference distribution for their prefix. References will also be returned to members querying for their own deposited data.

UNIXSD metadata

UNIXSD results contain a sequence of Crossref produced meta-metadata including:

  • citedby-count: number of Cited-by matches identified by Crossref
  • owner-prefix: the prefix that ‘owns’ (has permissions for) the DOI
  • citation-id: an internal identifier assigned to the DOI
  • journal-id: a Crossref-generated ID for a given journal
  • book-id: a Crossref-generated ID for a book, conference proceeding, database, standard, dissertation, or report/working paper
  • series-id: an Crossref-generated ID for a series (applies to book and conference proceeding series)
  • last-update: the date the record was last updated

This meta-metadata is contained in a <crm-item> element, for example:

<crm-item name="citedby-count" type="number">0</crm-item>
<crm-item name="owner-prefix" type="string">10.1353</crm-item>
<crm-item name="citation-id" type="number">25715607</crm-item>
<crm-item name="journal-id" type="number">48965</crm-item>
<crm-item name="book-id" type="number" />
<crm-item name="series-id" type="number" />
<crm-item name="last-update" type="date">2007-08-07 15:31:43.0</crm-item>

The full metadata record as deposited by members (with the exception of limited or closed references) is available as well. The member as-deposited XML will begin with the <crossref> element.

UNIXSD schema

UNIXSD results are generated using crossref_query_output3.0.xsd (schema | documentation)

Example UNIXSD result

<crossref_result xmlns="" xmlns:xsi="" version="3.0" xsi:schemaLocation="">
   <query status="resolved">
 	<doi type="journal_article">10.1353/aq.1998.0005</doi>
 	<crm-item name="publisher-name" type="string">Johns Hopkins University Press</crm-item>
 	<crm-item name="prefix-name" type="string">Muse - Johns Hopkins University Press</crm-item>
 	<crm-item name="member-id" type="number">147</crm-item>
 	<crm-item name="citation-id" type="number">25715607</crm-item>
 	<crm-item name="journal-id" type="number">48965</crm-item>
 	<crm-item name="deposit-timestamp" type="number">20070206205234</crm-item>
 	<crm-item name="owner-prefix" type="string">10.1353</crm-item>
 	<crm-item name="last-update" type="date">2007-02-13T20:56:13Z</crm-item>
 	<crm-item name="created" type="date">2007-02-07T02:04:57Z</crm-item>
 	<crm-item name="citedby-count" type="number">1</crm-item>
  	<crossref xmlns="" xsi:schemaLocation="">
    	<journal_metadata language="en">
     	<full_title>American Quarterly</full_title>
     	<abbrev_title>American Quarterly</abbrev_title>
     	<issn media_type="electronic">1080-6490</issn>
     	<publication_date media_type="print">
    	<journal_article publication_type="full_text">
      	<title>&quot;Disturbing the Peace: What Happens to American Studies If You Put African American Studies at the Center?&quot;: Presidential Address to the American Studies Association, October 29, 1997</title>
      	<person_name sequence="first" contributor_role="author">
       	<given_name>Mary Helen.</given_name>
     	<publication_date media_type="print">

Last Updated: 2020 April 8 by Laura J. Wilkinson