Adobe makes available a partial specification of SWF,[27] most recently updated in January 2013 to reflect changes in SWF version 19.[28] SWF versions have been decoupled from Flash player versions after Flash 10. Afterwards the version number of the SWF progressed rabidly; SWF version 19 corresponds to the new features added in Flash Player 11.6.[29] Flash Player 14 uses SWF version 25.[30]
In 2008, the specifications document was criticized by Rob Savoye, the lead developer of the Gnash project, as missing "huge amounts" of information needed to completely implement SWF, omitting specifications for RTMP and Sorenson Spark.[9] The RTMP specification[31] was released publicly in June 2009.[citation needed] The Sorenson Spark codec is not Adobe's property.