razones técnicas a utilizar en barras de navegación. ¿Hay alguna?

Question

¿Hay razones técnicas (CSS relaciona / jQuery) por qué utilizar la etiqueta <ul> de barras de navegación, en lugar de usar las etiquetas a?

<nav>
  <ul class="links">
    <li><a href="/">Home page</a></li>
    <li><a href="/about">About page</a></li>
  </ul>
</nav>

vs

<nav>
    <a href="/">Home page</a>
    <a href="/about">About page</a>
</nav>

Answer 1

• It's, arguably, 'more semantic': those links probably are a list
• Without the nav element, (i.e. in HTML5), the ul often provides a useful container for styling

Answer 2

Unlike XML, you cannot make-up tags in HTML. Sure, will probably work but it's invalid mark-up.

Lists usually provide a nice way to mark things up that make sense. Structure, it usually makes sense (you typically have a list of items in your navigation, no?). Definition lists can lend themselves to some forms of navigation but lists usually make the most sense.