HTML and CSS Reference
currently support this new feature. This means that there is a large group of users out there for whom browser valida-
tions will not work. This is why it is important not to rely solely on HTML5 browser validation. If you are building a
website that will be interacting with a database or performing some other action based on data provided by a user,
you need to make sure that you validate this data in your server-side application code. Not doing so could leave your
website vulnerable to attack by hackers.
Chapter 8 focuses on how you can make your web pages more useful to computer programs using microdata . This
involves using special markup syntax and element attributes to give your content greater semantic meaning.