Many websites have a title and a tagline or subtitle. So for making the main heading and subtitle into one logical unit, the main heading and subtitle can be grouped in the new <hgroup> element:
<header> <a href="/"><img src=logo.png alt="home"></a> <hgroup> <h1>My interesting blog</h1> <h2>Tedium, dullness and monotony</h2> </hgroup> </header>
The header can also contain navigation. This can be very useful for site-wide navigation, especially on template-driven sites where the whole of the <header> element could come from a template file.
There can be multiple <header>s in a page.
