The HTML Working Group published eight documents:
Working Drafts of the
HTML5 specification,
the accompanying explanatory document
HTML5 differences from HTML4,
and the related non-normative reference
HTML: The Markup Language.
Working Drafts of the specifications
HTML+RDFa 1.1
and HTML Microdata,
which define mechanisms for embedding machine-readable
data in HTML documents, and the specification
HTML Canvas 2D Context,
which defines a 2D immediate-mode graphics API for use
with the HTML5 <canvas> element.
HTML5:
Techniques for providing useful text alternatives, which is intended to help authors
provide useful text alternatives for images in HTML
documents.
Polyglot
Markup: HTML-Compatible XHTML Documents, which is intended to help authors produce
XHTML documents that are also compatible with non-XML HTML
syntax and parsing rules.