Advice is now provided in the HTML spec on how to mark up subheadings, subtitles, alternative titles and taglines using existing and implemented HTML features.
In the following example the title and subtitles of a web page are grouped using a
header element. As the author does not want the subtitles to be included the table of contents and they are not intended to signify the start of a new section, they are marked up using
p elements. A sample CSS styled rendering of the title and subtitles is provided below the code example.
<header> <h1>HTML 5.1 Nightly</h1> <p>A vocabulary and associated APIs for HTML and XHTML</p> <p>Editor's Draft 9 May 2013</p> </header>