This document provides an agenda and notes for a presentation on HTML5. It begins with an introduction comparing XHTML to HTML5. It then covers various HTML5 topics like page structure elements, audio, video, geolocation and captions. For each topic, it provides examples and discusses browser support and best practices. It encourages using open standards like Ogg for audio and video to avoid patent issues. The presentation emphasizes building HTML5 pages that work across browsers using techniques like feature detection and polyfills.