For the current relationship of this specification to others, see this specification group: Voice.
| 2010-09-07 | Speech Synthesis Markup Language (SSML) Version 1.1 Recommendation |
| 2010-02-23 | Proposed Recommendation |
| 2009-08-27 | Candidate Recommendation |
| 2008-11-07 | Candidate Recommendation |
| 2008-06-20 | Last Call Working Draft |
| 2008-03-17 | Working Draft |
| 2007-12-12 | Working Draft |
| 2007-09-04 | Working Draft |
| 2007-06-11 | Working Draft |
| 2007-01-10 | First Public Draft |