The TDX2002 ruleset was followed by TXD2005. Because all DivX codecs are banned in this new ruleset, TDX became TXD: The "XviD" Releasing Standards. There is a rebuttal against this revision, proving it to be flawed in several aspects. Higher resolutions are not allowed. More efficient formats such as AVC and AAC have not been adopted yet, but are still being pushed by some release groups. There are also considerations to replace the old proprietary AVI file format with a modern container such as MP4 or MKV that can include multiple audio streams, subtitles and DVD-like menus. However, few standalone DVD players support these formats yet, and cross-platform playback is an important consideration. Nonetheless the introduction of MPEG-4 playback capabilities in standalone DVD players was a result of the huge amount of TDX-compliant movie material available on the internet.