Standards Supported by Web Document Conformance Checker

Summary

Standard	Version	Note
HTML	5 (Editor's Draft)	Partially
Atom	RFC	Partially
XML	1.0 Fourth Edition	Tentative
	1.1 Second Edition	Tentative
XML Namespaces	1.0 Second Edition	Tentative
	1.1 First Edition	Tentative
CSS	2.1	Most part
Selectors	3
HTTP		Tentative (no validation)

DOM

The current implementation assumes that there are following requirements:

• The document element (or root element) MUST be allowed to be a root element. For example, an html element in http://www.w3.org/1999/xhtml namespace is allowed to be a root element by the HTML5 specification.

HTML

HTML5 is partially implemented.

Restrictions:

• December 2007 content model is not implemented yet.
• Form elements are not implemented yet.

Atom

Only a part is implemented.

CSS

CSS @namespace and Selectors Level 3 are fully implemented.

CSS 2.1 and CSS Color Level 3 are partially implemented.

Since the CSS 2.1 specification is sometimes ambigious or disagree with browsers, our implementation is tend to copy what browsers do unless there is strong resaon to do different thing.

In addition, the current implementation assumes that there are following requirements:

• The charset parameter of the media type text/css MUST be treated as if it were an unknown parameter for the purpose of determining styling langauge for an HTML style element.
• Content of an HTML style element whose content is interpreted as a CSS style sheet MUST consist of zero or more text nodes. Note that it may also contain zero or more comment and/or processing instruction nodes.