With all the hype surrounding HTML5, the latest web standard has become a bit self-conscious of its designation. Therefore, it demands that you just refer to it—and all future iterations—as HTML. Got it?
WHATWG and W3C, the main organizations leading the charge to create a final HTML5 spec, realized that updates and new standards are moving at such rapid speeds that it's silly to adhere to snapshots of the HTML standard. Instead, HTML will simply be a living, ever-evolving specification, which it basically has been for years (the updates in between versions were just called "drafts"). So keep this in mind, lest some mouth breather hears you slipping up and starts screaming about how you're a noob. [WHATWG]