<topicset>The <topicset> element defines a complete unit of content that can be
reused in other DITA maps or other <topicset> elements. Unlike the base
<topicref> element, the <topicset> is explicitly
intended to define a set of topics that are often or always used as a unit; it can be
especially useful for task composition in which larger tasks are composed of smaller tasks.
The @id attribute on a <topicset> is required, which
ensures that the complete unit is available for reuse in other contexts.
Category: Map group elements