This document is a non-normative reference that provides details to help producers of HTML content create conformant documents, and to help others check the conformance of existing documents. It has the following design goals:
The first two of the above design goals make this reference similar in scope to the HTML5 (Edition for Web Authors) subset [HTML5AUTHOR] of the normative HTML5: A vocabulary and associated APIs for HTML and XHTML full specification [HTML5].
Certain purposes are intentionally out of scope for this reference document; specifically, it:
For implementation conformance criteria for HTML consumers and detailed information on related APIs, instead see the HTML5: A vocabulary and associated APIs for HTML and XHTML full specification [HTML5].
Finally, because this document is intended for use strictly as a reference, it does not attempt to also be a tutorial or “how to” authoring guide.