The indexing domain provides several new elements for use
with indexing. The new elements allow authors to define "See" and
"See also" references, and to override the default sort order for
Indexing domain elements typically work with the indexterm
and index-base elements; index-base is grouped with elements that
are typically useful only in specialization contexts, and can be found
using the link below.
The content of an <indexterm> element
is used to produce an index entry in the generated index. You can
nest indexterm elements to create multi-level indexes. The content
is not output as part of the topic content, only as part of the index.