http://docs.racket-lang.org/reference/reader.html?q=%23%21#(idx._(gentag._207._(lib._scribblings/reference/reference..scrbl)))
It is in the r6rs standard. Racket treats #!r6rs as equivalent to #lang r6rs. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
