Document Subtitle

Subordinate part of a title for a document or document component.


In Metadata: In the article metadata, the article subtitle and title are identified separately and tagged with two different elements, the <article-title> and <subtitle> elements.

In Citations: Within a bibliographic reference citation, the subtitle of a document cannot be preserved separately as this Tag Set identifies no cited-subtitle elements. How the subtitle should be tagged depends on how the citation is tagged.

For references tagged with either the <element-citation> or the <nlm-citation> elements, since these two models do not permit untagged text there are two choices:

For references tagged with the <mixed-citation> element, there are three choices:

Best Practice In Citations: Although this Tag Set cannot enforce either practice, retrieval performance will be enhanced if the subtitle for all cited material is consistently placed within the <article-title> element for journal articles and within the <source> element for book titles, proceedings titles, and other documents. When marked as either a <named-content> or left as untagged text, the subtitle is easy to lose to searching. It is also not always easy to identify, particularly with historical or foreign material, which part of a multipart title is the main title and which the subtitle.


content-type Type of Content
specific-use Specific Use
xml:lang Language

Related Elements

There are several elements concerned with the title of an article, all contained within the container element <title-group> in the article metadata:

Content Model

<!ELEMENT  subtitle     (#PCDATA %subtitle-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 | break)*


Any combination of:

This element may be contained in:

<title-group>, <verse-group>


<article-title>Adaptins<fn id="FN206">
<p>Online version of this essay contains
supplemental tabular material.</p>
<subtitle>The Final Recount</subtitle>