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Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

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Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification
W3C Candidate Recommendation 08 September 2009
This version: http://www.w3.org/TR/2009/CR-CSS2-20090908 [p. ??] Latest version: http://www.w3.org/TR/CSS2 [p. ??] Previous versions: http://www.w3.org/TR/2009/CR-CSS2-20090423 [p. ??]http://www.w3.org/TR/2008/REC-CSS2-20080411/ [p. ??] Editors: Bert Bos [p. ??] Tantek Çelik [p. ??] Ian Hickson [p. ??] Håkon Wium Lie [p. ??] Please refer to the errata [p. ??] for this document. This document is also available in these non-normative formats: plain text [p. ??] , gzip’ed tar file [p. ??] , zip file [p. ??] , gzip’ed PostScript [p. ??] , PDF [p. ??] . See also translations [p. ??] . Copyright[p. ??] © 2009 World Wide Web ConsortiumW3C [p. ??] ® (Massachusetts Institute of TechnologyMIT [p. ??] , European Research Consortium for Informatics and MathematicsERCIM [p. ??] , Keio [p. ??] ), All Rights Reserved. W3C liability [p. ??] , trademark [p. ??] and document use [p. ??] rules apply.

This specification defines Cascading Style Sheets, level 2 revision 1 (CSS 2.1). CSS 2.1is a style sheet language that allows authors and users to attach style (e.g., fonts and spacing) to structured documents (e.g., HTML documents and XML applications). By separating the presentation style of documents from the content of documents, CSS 2.1 simplifies Web authoring and site maintenance. CSS 2.1 builds on CSS2 [CSS2] which builds on CSS1 [CSS1]. It supports media-specific style sheetsso that authors may tailor the presentation of their documents to visual browsers, aural devices, printers, braille devices, handheld devices, etc. It also supports content positioning, table layout, features for internationalization

4 Sep 2009 15:30


Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

and some properties related to user interface. CSS 2.1 corrects afew errors in CSS2 (the most important being a new definition of the height/width of absolutely positioned elements, more influence for HTML’s "style" attribute and a new calculation of the ’clip’ property), and adds a few highly requested features which have already been widely implemented. But most of all CSS 2.1 represents a "snapshot" of CSS usage: it consists of all CSS features that areimplemented interoperably at the date of publication of the Recommendation. CSS 2.1 is derived from and is intended to replace CSS2. Some parts of CSS2 are unchanged in CSS 2.1, some parts have been altered, and some parts removed. The removed portions may be used in a future CSS3 specification. Future specs should refer to CSS 2.1 (unless they need features from CSS2 which have been dropped in CSS2.1, and then they should only reference CSS2 for those features, or preferably reference such feature(s) in the respective CSS3 Module that includes those feature(s)).

Status of this document
This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technicalreport can be found in the W3C technical reports index at http://www.w3.org/TR/ [p. ??] . This is a W3C Candidate Recommendation, which means the specification has been widely reviewed and W3C recommends that it be implemented. It will remain Candidate Recommendation at least until 23 October 2009. [p. 3] A test suite and an implementations report will be provided before the document becomes aProposed Recommendation. Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress. The (archived [p. ??] ) public mailing list www-style@w3.org [p. ??] (see instructions [p. ??] ) is preferred...
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