Map elements
Map elements include the core components of DITA maps,
such as <topicref> and <reltable>, as well as general purpose
map specializations in the map group domain.
Basic map elements 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.
Map group elements 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.