For the current relationship of this specification to others, see these specification groups: Declarative Web Applications, Voice.
| 2010-12-16 | Working Draft |
| 2010-05-13 | Working Draft |
| 2009-10-29 | Working Draft |
| 2009-05-07 | Working Draft |
| 2008-05-16 | Working Draft |
| 2007-02-21 | Working Draft |
| 2006-01-24 | Working Draft |
| 2005-07-05 | First Public Draft |