The issue number of a journal; in the journal metadata, this is the issue number of the issue in which the article appears.
<issue> may be used in bibliographic references (<citation> and <nlm-citation>). For extensive examples of formatted <nlm-citation>s including use of <issue>s in <nlm-citation>s, see: Sample PubMed Central Citations. To see tagged versions of these examples, see: Sample PubMed Central Citations - XML Tagged.
<!ELEMENT issue (#PCDATA %issue-elements;)* >
Text, numbers, or special characters, zero or more
<article-meta> Article Metadata; <citation> Citation; <nlm-citation> NLM Citation Model; <product> Product Information; <related-article> Related Article Information
In article metadata:
...
<article-meta>
<article-id pub-id-type="pmid">...</article-id>
<title-group>...</title-group>
<contrib-group>...</contrib-group>
<aff id="StLukes">...</aff>
<pub-date pub-type="pub">
<day>27</day><month>03</month>
<year>1999</year>
</pub-date>
<volume>318</volume>
<issue>7187</issue>
<fpage>837</fpage>
<lpage>841</lpage>
<history>
<date date-type="accepted">
<day>29</day>
<month>01</month>
<year>1999</year></date>
</history>
<permissions>
<copyright-statement>Copyright © 1999, British
Medical Journal</copyright-statement>
<copyright-year>1999</copyright-year>
<copyright-holder>British Medical Journal</copyright-holder>
</permissions>
<abstract>
<p>To examine the effectiveness of
day hospital attendance in prolonging independent living for elderly
people.</p>
</abstract>
</article-meta>
...
In a NLM-style bibliographic citation:
...
<ref>
<nlm-citation citation-type="journal">
<person-group>...</person-group>
<article-title>Electrogastrographic study of patients with
unexplained nausea, bloating and vomiting</article-title>
<source>Gastroenterology</source>
<year>1980</year>
<month>08</month>
<volume>79</volume>
<issue>2</issue>
<fpage>311</fpage>
<lpage>314</lpage>
</nlm-citation>
</ref>
...
common.ent