An illustratration of a key concept of the work, such as a code listing, case study or problem.
Relation to ARIA
doc-example inherits its semantics from the a section role (i.e., it represents a container
of related content, but is not a landmark).
doc-example is typically used on
For a simplified list of all the elements the role is allowed on, refer to the mapping table in the EPUB Type to ARIA Role Authoring Guide. For the official list of allowed elements, refer to ARIA in HTML.