The document discusses HTML5 and how it can be implemented in Drupal. It covers new HTML5 elements like <section>, <header>, <article>, and new form input types. It also discusses HTML5 APIs for geolocation, websockets, web workers and web storage. The document recommends resources for learning HTML5 and lists HTML5 modules for Drupal like HTML5 Tools that add HTML5 elements and features to Drupal.