11. Primary Structure and Sections
This chapter is a counterpart to Chapter 2 because it describes related elements unique to HTML5. If you’re writing X/HTML documents, then this chapter isn’t relevant. But, if you’re writing HTML5, then it combines with Chapter 2 to detail all the primary structural and sectional elements at your disposal.
In X/HTML, the div element is your main device to contain chunks of content. As you know, div, although great as a container, has absolutely no semantic meaning. The seven elements in this chapter are containers that do have meaning. div doesn’t go away in HTML5; you just won’t use it as often.
Furthermore, a few of these elements directly impact a document’s outline and change the way you use h1–h6 headings ...
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