The <apiMap> element provides the name of the application programming interface (API) reference and all the elements necessary to describe the package, or set of packages, and its components.
The containing element for a map is the <apiMap> element that can contain the title and id attributes. In the <apiMap> element, use the <apiPackageRef>, <topicmeta> and <reltable> sub elements to add and organize references to the topics.
apiItemRef, reltable, topicmeta
( (topicmeta) (optional) then (apiItemRef) (any number) then (reltable) (any number))