Comment in a Citation

A container element that holds unstructured text within an otherwise element-structured bibliographic reference (<element-citation> or <mixed-citation>); therefore, this is not necessarily a comment in the formal sense of commentary. In an unstructured bibliographic reference, this textual material would merely be a mixture of text, numbers, or special characters, such as punctuation, and not marked with tags at all.


The element <comment> is used to contain additional information about a citation that is not appropriate in any of the other, named, information types.

Since in the Journal Archiving Tag Set, the model for <mixed-citation> is a loose model with text, numbers, and special characters, such as punctuation, allowed everywhere, this element will rarely be needed. The <comment> element has been defined here largely for the sake of conversion, to preserve unusual bits of semantic markup when translating from other tag sets. Typical comments might include:

<comment>translated from Russian</comment>

Conversion Note: The <comment> element should be used to mark substantive text only; it should not be used to mark punctuation that occurs between elements.


content-type Type of Content

Related Elements

Display Note: <comment> elements should appear inline with other reference elements. This is a very different rendering from that given the similar element <annotation>, which is typically a longer commentary concerning a citation and therefore is rendered as a block element.

Content Model

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

Expanded Content Model

(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x)*


Any combination of:

This element may be contained in:

<element-citation>, <mixed-citation>, <nlm-citation>, <product>, <related-article>, <related-object>


In an element-style bibliographic reference (punctuation and spacing removed):

<element-citation publication-type="commun">
115 Park Street, W, [London, GB]
<source>Letter to: Marquis Townshend</source>
<size units="leaf">4 leaves</size>
<comment>Located at: Modern Manuscripts Collection,
History of Medicine Division, National Library of
Medicine, Bethesda, MD; MS F 179</comment>
<annotation><p>Nightingale responds to Townshend&rsquo;s
request on behalf of a Mrs. Montague for funds to
support old nurses</p></annotation>