This document describes the level of support provided by Windows Internet Explorer for the Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification [CSS-Level2-2009], W3C Candidate Recommendation 08 September 2009. CSS is the default style sheet language in Internet Explorer.
Appendix B of this document describes the level of support provided for features in Cascading Style Sheets Level 1 [CSS-Level1-2008] W3C Recommendation 17 Dec 1996, revised 11 Apr 2008. Only requirements that directly conflict with CSS 2.1 features are included.
The [CSS-Level2-2009] and [CSS-Level1-2008] specifications contain guidance for authors of webpages and browser users, in addition to user agents (browser applications). Statements found in this document apply only to normative requirements in the specification targeted to user agents, not those targeted to authors.