An article number that acts in the place of a page identifier for an article (such as an online article) that does not have traditional page numbers, e.g., the items published in Prevention & Treatment and in the PsycCRITIQUES database
(#PCDATA)
Text, numbers, or special characters
<article-meta>, <mixed-citation>, <product>, <related-article>
...
<article-meta>
<article-id pub-id-type="apaID">psq_2009_4984_1_2</article-id>
<article-id pub-id-type="doi">10.1037/a0016342</article-id>
<article-id pub-id-type="pi-uid">2009-07436-001</article-id>
<article-categories>...</article-categories>
<pub-date>
<string-date><month number="7">July</month>
<day>8</day>, <year>2009</year></string-date>
</pub-date>
<volume>54</volume>
<issue>27</issue>
<elocation-id>1</elocation-id>
<product>...</product>
...
</article-meta>
...
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