Structure of the markup produced by the function genesis_do_subnav

index.php

<nav class="nav-secondary" itemscope itemtype="http://schema.org/SiteNavigationElement">
	<div class="wrap">
		<ul id="menu-secondary-navigation" class="menu genesis-nav-menu menu-secondary">
			<li class="menu-item">
				<a href="" itemprop="url">
					<span itemprop="name"><!-- menu item --></span>
				</a>
			</li>
		</ul>
	</div>
</nav>

index.xhtml.php

<div id="subnav">
	<div class="wrap">
		<ul id="menu-secondary-navigation" class="menu genesis-nav-menu menu-secondary">
			<li class="menu-item">
				<a href="" itemprop="url"><!-- menu item --></a>
			</li>
		</ul>
	</div>
</div>