I am trying to implement schema.org microdata for my menu navigation. This navigation will look similar to this:
<ul>
    <li><a href="#"><span>Name1</span></a></li>
    <li><a href="#"><span>Name2</span></a></li>
    <li><a href="#"><span>Name3</span></a></li>
</ul>
I want to make use of SiteNavigationElement, unfortunately all I could find where examples with no clear answer of how to make use of multiple elements.
Does anybody know for sure, how to use SiteNavigationElement on multiple elements?
UPDATE:
This is my original menu structure I came up with after reading all answers in the duplicate link:
<nav class="menu" itemscope itemtype="http://schema.org/SiteNavigationElement">
    <ul class="main-menu" role="menubar">
        <li class="main-menu">Home</li>
        <li class="parent">
            <ul class="sub-menu">
                <li><a itemprop="url" role="menuitem" href="index.php"><span itemprop="name">Home</span></a></li>
                <li><a itemprop="url" role="menuitem" href="tricks.php"><span itemprop="name">Tricks</span></a></li>
                <li><a itemprop="url" role="menuitem" href="features.php"><span itemprop="name">Features</span></a></li>
            </ul>
        </li>
    </ul>
 </nav>
Now, everything has been fully indexed by google and I am able to see it in Google Webmaster Tools.
So how does Google Webmaster Tools see it?
Page URL   | Items | Items with errors | Last detected |    Name    | Errors
----------------------------------------------------------------------------
Page1.php  |   1   |          -        |     2/11/16   |  Features  |    -
Page2.php  |   1   |          -        |     2/11/16   |  Features  |    -
Page3.php  |   1   |          -        |     2/11/16   |  Features  |    -
Page4.php  |   1   |          -        |     2/11/16   |  Features  |    -
...
All my pages which have been indexed and have the menu (Page1.php - Page4.php), each only have 1 item. And the detected item is always only the last link specified in SiteNavigationElement.
So there must be an error obviously.
- Why is google only seeing one link?
 - And why is it always the last link?