DITA maps are built from a few core elements that are used
for referencing and organizing topics. The <topicmeta> element
is also available to specify metadata for the map, for individual
topics, or for groups of topics. Many elements inside <topicmeta>
are also available inside the topic prolog.
The map group domain elements define, group,
or reference content. Many of the map group elements are convenience
elements, which means that they simply make it easier for an author
to make use of existing functions.