navtitle

The navigation title (<navtitle>) element is one of a set of alternate titles that can be included inside the <titlealts> element. This navigation title may differ from the first level heading that shows in the main browser window. Use <navtitle> when the actual title of the topic isn't appropriate for use in a table of contents, navigation pane, or online content (for example, because the actual title is too long). Beginning with DITA 1.2, the navtitle element is also available in the <topicmeta> element in a <topicref> in a map, and its use is preferred over the topicref's navtitle attribute.

When navtitle is used in a map, it functions in the same way as the navtitle attribute; both are used to specify a navigation title for the target of the <topicref> element. That is, the title itself will only be used as an actual navigation title when the title is locked; the title is locked when the closest ancestor topicref element sets or inherits the attribute locktitle="yes". If the title is not locked, processing systems will typically retrieve the current title from the target topic, looking first for a navtitle element and second for the general title.

Because the navtitle element is available within topicmeta, and topicmeta is used in many different contexts, it is possible that navtitle can be specified in contexts where a navigation title does not make sense (for example, on the topicgroup element). In those situations, the navtitle element has no defined purpose.

Doctype	Content model
topic (base), map (base), classifyMap, subjectScheme, learningAssessment, learningBookmap, learningContent, learningMap, learningOverview, learningPlan, learningSummary	( text data or data or data-about or foreign or unknown or keyword or term or ph or b or i or sup or sub or tt or u) (any number)
topic (technical content), map (technical content), concept, ditabase, glossary, glossentry, glossgroup, reference, task, bookmap	( text data or data or data-about or foreign or unknown or keyword or apiname or option or parmname or cmdname or msgnum or varname or wintitle or term or abbreviated-form or ph or b or i or sup or sub or tt or u or codeph or synph or filepath or msgph or systemoutput or userinput or menucascade or uicontrol) (any number)
machineryTask	( text data or data or data-about or foreign or unknown or keyword or wintitle or term or ph or b or i or sup or sub or tt or u or menucascade or uicontrol) (any number)

Doctype	Content model
topic (base), topic (technical content), concept, ditabase, glossary, glossentry, glossgroup, reference, task (strict), task (general), machineryTask, learningAssessment, learningContent, learningOverview, learningPlan, learningSummary	titlealts
map (base), map (technical content), bookmap, classifyMap, learningBookmap, learningMap	topicmeta
subjectScheme	topicmeta, subjectHeadMeta

In this sample, the first title is not locked, and will generally be replaced with a title retrieved from a.dita. The second title is locked, and will be displayed when this map is used as a basis for navigation.

<map xml:lang="en">
<title>This is a sample map</title>
<topicref href="a.dita">
<topicmeta>
<navtitle>Title of A</navtitle>
</topicmeta>
</topicref>
<topicref href="b.dita" locktitle="yes">
<topicmeta>
<navtitle>Short Title for B</navtitle>
</topicmeta>
</topicref>
</map>

Name	Description	Data Type	Default Value	Required?
univ-atts attribute group (includes select-atts, id-atts, and localization-atts groups)	A set of related attributes, described in univ-atts attribute group
global-atts attribute group (xtrf, xtrc)	A set of related attributes, described in global-atts attribute group
class	A common attribute described in Other common DITA attributes