Beautiful definition of common usage of "HTML5"

I've been talking to a lot of folks about HTML5 recently, and always find myself struggling with the conversations actually including areas that aren't technically part of the HTML5 spec but are referred to in the same sentence 90% of the time.

So today someone pointed me at Brad Neuberg's CodingInParadise blog and this fantastic post that both provides a definition of the general sense in which the term HTML5 is generally used, as well as a proposed set of specific definitions for different layers of the onion peeling.

Here's the short version.

"Everything that is in the formal W3C HTML5 spec; everything that used to be in there but was broken out for various reasons; sibling and related technologies and developments like CSS3, SVG, EcmaScript 5, etc.; and experimental explorations that are pushing the boundaries."

Read the post to get the rest.