Type of Publication Identifier

Type of publication identifier or the organization or system that defined the identifier.


This attribute is used in several contexts:
  • as part of the article metadata defined inside the element <article-meta> (for example, on the <article-id> element, which holds an identifier for the entire article, or the <product> element);
  • inside a bibliographic citation element such as <mixed-citation> or <element-citation> (for example, on the <pub-id> element, which identifies a publication cited in a bibliographic reference list);
  • on an object identifier element (<object-id>), which can act as an identifier for any number of different elements;
  • on a related article or other related object (for example, on the element <related-object>); and
  • on an issue or volume identifier (for example, on the <issue-id> element, which identifies an issue).

With these Elements

<article-id>, <issue-id>, <object-id>, <pub-id>, <volume-id>
Value Meaning
Text, numbers, or special characters The type of identifier “doi” or name or type of organization that created the identifier, such as “aggregator”.
Restriction: @pub-id-type is an optional attribute; there is no default.

Suggested usage

Best Practice: The type of identifier should be named for established types (DOIs, SICIs, Codens). If the identifier is not of an established type, name the assigning agency (PMC, OCLC) or type of assigning agency (aggregator, archive, indexing service, publisher) which assigned the identifier. Potential values include:


(bioinformatics) a unique identifier given to a DNA or protein sequence record for tracking the sequence record and the associated sequence over time in a data repository.


Identifier assigned by an archive or other repository (generally used with elements <object-id>, <issue-id>, and <volume-id>)


Archival Resource Key — a Uniform Resource Locator (URL) containing the word "ark" that is a multi-purpose identifier for information objects of any type


Generic article accession identifier for interchange and retrieval between archives


arXiv archive of electronic preprints


Obsolete PDB/CCDC identifier (may be present on older articles)


Directory of Open Access Journals


Digital Object Identifier


Handle identifier, part of the Handle System for assigning, managing, and resolving persistent identifiers for digital objects and other resources on the Internet


Identifier assigned by an abstracting or indexing service (generally used with elements <object-id>, <issue-id>, and <volume-id>)


International Standard Book Number


Identifier assigned to a manuscript


NLM Medline identifier


PubMed Central identifier



Publisher’s identifier, such as an “article-id”, “artnum”, “identifier”, “article-number”, “pub-id”, etc.


Serial Item and Contribution Identifier (An ANSI/NISO Z39.56 code to uniquely identify volumes, articles, or other parts of a periodical. A journal article may have more than one SICI, for example, one for a print version and another for an electronic version.)


The official number of a standard, from a standards body such as ISO, NISO, IEEE, ASME, et al., for example, “Z39.96-2012”.

Example 1

<article-id pub-id-type="publisher-id">1037</article-id>
<article-id pub-id-type="doi">10.1128/JCM.39.7.2634-2636.2001</article-id>
<article-id pub-id-type="pmid">11427581</article-id>

Example 2

<element-citation publication-type="journal" publication-format="print">
<pub-id pub-id-type="doi">10.1542/peds.2004-1441</pub-id>