Relevant spec links

• HTML living standard: http://www.whatwg.org/specs/web-apps/current-work/multipage/
• DOM living standard: http://dom.spec.whatwg.org/
• CSSOM editor's draft: http://dev.w3.org/csswg/cssom/
• CSS2.1: http://www.w3.org/TR/CSS21/
• Quirks mode: http://quirks.spec.whatwg.org/

[12:10:08] <Ms2ger> If it's on http://spec.whatwg.org/, use that
[12:10:26] <Ms2ger> Otherwise, if it's on {dev,dvcs}.w3.org, use that
[12:10:56] <Ms2ger> Otherwise, if it's CSS2.1, use http://www.w3.org/TR/CSS21/
[12:11:00] <Ms2ger> Otherwise... What?

[13:45:39] <jgraham> the general rules are a) prefer WHATWG specs over W3C ones, always and b) if you have to use W3C specs always use editor's drafts