Commentary, summary, review, or similar non-bibliographic information concerning the cited work in a bibliographic reference <citation>. (For the intent, see Remarks below.)


While most citations simply provide the bibliographic information for a cited reference, a few describe the work, categorize the work, comment upon the nature or quality of the work, or summarize its findings. The <annotation> element is intended to hold such commentary.

Display Note: All of the other reference elements are inline elements. In contrast, an <annotation> is typically presented as a block element, with space before and after it.

Related Elements

This element is not related to the MathML <annotation> element, which is a mathematical term only used with equations.

Model Information

Content Model

<!ELEMENT  annotation   ((%just-para.class;)+)                       >


Any one of:

This element may be contained in:

<citation> Citation; <related-article> Related Article Information

Tagged Example

<ref id="B27">
<etal>et al.</etal>
<article-title>Functional discovery via a compendium 
of expression profiles.</article-title>
<p>This report is the most extensive DNA expression 
profile of yeast genes. It examines the expression 
pattern of the whole yeast genome in 300 mutant 
strains. It infers the function of many unknown 
genes comparing profiles among the different