These three documents will be of interest to different groups. The CSS 2.1 document will be of interest to those who wish to see the final documentation of approaches which have been deployed, in order to ensure that widely implemented features are thoroughly and unambiguously documented (“CSS 2.1 corrects a few errors in CSS2 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 are implemented interoperably at the date of publication“).
The CSS Snapshot 2010 document is a brief document which collects together into one definition the specs that together form the current state of Cascading Style Sheets (CSS). This will be of interest to those who like to be able to see the big picture and the relationships and dependencies.
In contrast the CSS Writing Modes Module Level 3 specification is likely to be of interest to those with specific interests in bidirectional and vertical text.
Last Call comments are welcome until 7 January 2011.