<nav>
   <a rel="up up" href="../../index.html">HTML 5</a>&#160;&gt;&#160;
   <a rel="up" href="../index.html">HTML Tags</a>&#160;&gt;&#160;
   <b>HTML &lt;nav&gt; tag</b>
</nav>

As shown in the example above, the value up may be specified more than once in the <a rel> attribute: rel="up" points to the parent document, rel="up up" points to the grandparent, and so forth.

Search Engine Friendly Navigation Section with Breadcrumb Trail

Some search engines, particularly Google, may include a breadcrumb trail in their search engine results if the links include microdata properties for a breadcrumb trail.

Search Engine Results

To code the breadcrumb trail microdata the breadcrumb trail list of links must include some microdata properties:

• elements with itemscope="itemscope" (a boolean attribute) and itemtype="http://data-vocabulary.org/Breadcrumb" identifying each link in the breadcrumb trail
• an a href element with itemprop="url" indicating the target URL of each breadcrumb link
• an element with itemprop="title" that provides the text for each breadcrumb link

<nav class="breadcrumb-trail">
   <ul>
      <li itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
         <a itemprop="url" rel="up up up" href="/">
            <span itemprop="title">HTML 5</span>
         </a>
      </li>
      <li itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
         <a class="nobr" itemprop="url" rel="up up" href="/tags/">
            <span itemprop="title">HTML Tags</span>
         </a>
      </li>
      <li itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
         <a itemprop="url" rel="up" href="./">
            <span itemprop="title">HTML <a href> Tag</span>
         </a>
      </li>
      <li itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
         <a itemprop="url" href="#examples#">
            <span itemprop="title">Examples</span>
         </a>
      </li>
   </ul>
</nav>

<nav style="height: 1.5em">
<style scoped="scoped">
menu[type="toolbar"], menu[type="toolbar"] * {
   margin: 0;
   padding: 0:
}
menu[type="toolbar"] > li {
   display: inline-block;
   vertical-align: top;
   border: 2px solid #000000;
}
menu[type="toolbar"] > li > menu {
   float: left;
   width: 8em;
   background-color: #cccccc;
   text-align: center;
}
menu[type="toolbar"] > li > menu:before {
   content: attr(label);
   color: #333333;
}
menu[type="toolbar"] > li > menu > li {
   position: relative;
   z-index: 1;
   background-color: #cccccc;
   text-align: left;
   display: none;
   -moz-transition: background-color 0.3s;
   -webkit-transition: background-color 0.3s
}
menu[type="toolbar"] > li > menu:hover > li {
   display: block;
}
menu[type="toolbar"] > li > menu:hover > li:first-child {
   border-top: 2px solid #000000;
}
menu[type="toolbar"] > li > menu > li > a {
   padding: 0 1em;
   color: #333333;
   text-decoration: none;
}
menu[type="toolbar"] > li > menu:hover,
menu[type="toolbar"] > li > menu:hover:before,
menu[type="toolbar"] > li > menu > li:hover,
menu[type="toolbar"] > li > menu > li:hover > a
{
   background-color: #999999;
   color: #000000;
}
</style>
<menu type="toolbar">
   <li>
      <menu label="Sections">
         <li><a href="../../tutorials/">Tutorials</a></li>
         <li><a href="../../examples/">Examples</a></li>
      </menu>
   </li>
   <li>
      <menu label="&lt;menu&gt;">
         <li><a href="#description">Description</a></li>
         <li><a href="#syntax">Syntax</a></li>
         <li><a href="#attributes">Attributes</a></li>
         <li><a href="#examples">Examples</a></li>
         <li><a href="#whats-new">Changes</a></li>
      </menu>
   </li>
</menu>
</nav>