Common Lisp (CL) is a dialect of the Lisp programming language, published in ANSI standard document ANSI INCITS 226-1994 (R2004) (formerly X3.226-1994 (R1999)). From the ANSI Common Lisp standard the Common Lisp HyperSpec, a hyperlinked HTML version, has been derived.The Common Lisp language was developed as a standardized and improved successor of Maclisp. Thus it is not an implementation, but rather a language specification.