The schema.org SiteNavigationElement extends WebPageElement. It is used to mark-up links that would make amazing contextual links.
<nav role = "navigation" itemscope itemtype = "https://schema.org/SiteNavigationElement"> <ul> <li> <a href = "https://example.com/" title = "Link to home page" itemprop = "url"> <span itemprop="name">Home page</span> </a> </li> <li> <a href = "https://examplecom/demo" title="Link to demo page" itemprop = "url"> <span itemprop = "name">My demo page</span> </a> </li> </ul>