DocBook exporter
exports Org files as articles using the article
element in DocBook. Recursive sections, i.e. section
elements, are used in exported articles. Top level headlines in
Org files are exported as top level sections, and lower level
headlines are exported as nested sections. The entire structure
of Org files will be exported completely, no matter how many
nested levels of headlines there are.
Using recursive sections makes it easy to port and reuse
exported DocBook code in other DocBook document types like
book or set.