Issue Number


The issue number of a journal, or in rare instances, book


The <issue> element is used in two contexts: 1) as a part of the metadata describing a book component such as a chapter, and 2) as part of a description of a cited work inside a bibliographic reference (<citation>).

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;)*                  >


Any combination of:

This element may be contained in:

<book-part-meta> Book Part Metadata; <citation> Citation; <related-article> Related Article Information; <related-object> Related Object Information

Tagged Example

<ref id="bid.41">
<article-title>A common language for physical mapping 
of the human genome</article-title>
<pub-id pub-id-type="pmid">2781285</pub-id>