Summary
In this chapter, I’ve covered a core function of a good website or application: the underlying structure. Using markup in a correct and meaningful way lays the foundations for everything else I’m going to cover in this book and will be extremely important to making sure your own sites are maintainable and scalable.
I’ve been a little mean to HTML5 structural elements, but whether you use them or not, you should definitely consider using WAI-ARIA in your project, regardless of the context. Content accessibility is the bedrock of the Web, and even if you use roles and nothing else, you and your users win.
You also got a look at adding context to your sites through semantic and structured data, and you learned the importance of aboutness. ...
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