is a link to a document I wrote which lists the HTML 5 tags from the current draft HTML 5 standard. people are using HTML 5.0 NOW because browsers support it and there is standards support for things like video and audio.
the file lists the tag if it is a singleton, or if it has an optning and closing tag it lists the open and close tag names, followed by the list of attributes. for each attribute, a list of valid values is listed.
there are special rules for boolean attributes: boolean values are values whose names only must be present to indicate that the feature is on. no other valid method is allowed, for instance selected="true" or checked="true" is invalid, but checked or selected is valid. the absence of a boolean attribute means it is off.
I use html 5 for my site because it contains things like the nav, article, header, and footer tag so I can keep my navigation separate from the rest of my document and clearly delineate it from article content versus headers and footers boilerplate,
...and I digress.
HTML 4 is currently supported, at least most of the tags. please support all the tags of 5 and as much of the attributes as possible if attributes are something the editor is capable of.