Description
An introductory section that sets the background to a work, typically part of the narrative.
Examples
Example 1 — Prologue with a heading
The label is identified in the aria-labelledby attribute.
<section role="doc-prologue" aria-labelledby="prol-hd">
<h2 id="prol-hd">Prologue</h2>
…
</section>Relation to ARIA
doc-prologue is a landmark role.
Usage
doc-prologue is typically used on section elements.
A label must be provided for the role using one of the aria-labelledby,
aria-label or title attributes.
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.