I'm a little confused with roles. If I have in my page a navigation that is enclosed in a nav element and specify a role="navigation".
<nav role="navigation">
...
</nav>
Isn't it already semantically explicit that the nav section is navigation?
Or if I have some other navigation sections on my page, and specify role for only one of them, this section becomes the most important on a page? And those without role="navigation" just boring navigations?