Issue Number


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.


content-type Type of Content
seq Sequence

Related Elements

The related element <issue-id> records an identifier for the issue. This <issue> number element is typically just a simple number such as “4” or “35”.

Model Information

Content Model

<!ELEMENT  issue        (#PCDATA %issue-elements;)*                  >


Text, numbers, or special characters, zero or more

This element may be contained in:

<article-meta> Article Metadata; <citation> Citation; <nlm-citation> NLM Citation Model; <product> Product Information; <related-article> Related Article Information

Tagged Examples

Example 1

In article metadata:

<article-id pub-id-type="pmid">...</article-id>
<aff id="StLukes">...</aff>
<pub-date pub-type="pub">
<date date-type="accepted">
<copyright-statement>Copyright &#x00A9; 1999, British 
Medical Journal</copyright-statement>
<copyright-holder>British Medical Journal</copyright-holder>
<p>To examine the effectiveness of
day hospital attendance in prolonging independent living for elderly

Example 2

In a NLM-style bibliographic citation:

<nlm-citation citation-type="journal">
<article-title>Electrogastrographic study of patients with 
unexplained nausea, bloating and vomiting</article-title>