XviD used for standard definition English television releases has been a "ruleless world". However, in 2002 a ruleset for VCD, SVCD and DivX/Xvid "tries to cover up the mess a little". SDTV, PDTV, HDTV and their dupe rules were being defined. Nuking had always been an issue in the TV scene. In 2007, a document was released that "intended to bring a level playing field to the TV-XviD scene and attempt to put down some rules to end some of the controversy that has plagued us in recent years.", but it was only a draft. On January 1, 2011, a rule set written specifically for UK TV was released, taking into consideration various factors which differ from other regions.