Incomplete, rapidly changing.|
May include many features that will be dropped later.
Mostly complete and has a well-defined scope.|
Several more rounds of significant revisions expected.
Fairly stable: only minor polishing and fairly specific comments left.|
New features deferred to next level.
Complete but not finished.|
Official Call for Implementations. Focus switches to testing.
Considered stable and ready for wide use. Added to CSS Snapshot.|
Minor issues, bugs, and some missing tests prevent REC.
Spec is done and enters maintenance mode.|
Infrequent and minor errata.