WAI: Strategies, guidelines, resources to make the Web accessible to people with disabilities
Each slide is enclosed in <div class="slide"> ... </div>
The div element will be created automatically for h1 elements that are direct children of the body element.
<div class="presentation">
<div class="slide">
<h1>[slide title]</h1>
<div class="slidecontent">
[slide content]
</div>
<div class="handout">
[extra content not displayed in slide show]
</div>
</div>
</div>