title: Is it valid HTML5 to use a single tag for a div?
body: <p>For example: <code>&lt;div/&gt;</code> instead of <code>&lt;div&gt;&lt;/div&gt;</code>.
  I did this and apparently the HTML5 validator passed this as valid. I was wondering it this is actually true?</p>
  
  <p>PS: I'm serving page as application/xhtml+xml</p>