1. A method of designing a data driven information processor employing self-timed pipeline control through use of a computer, said method comprising the steps of: preparing a computer-readable library file in which is written a designing parameter, in a generalized format related to a functional block and processor of a data driven information processor that is a subject of design, setting a parameter value for each said designing parameters according to a design specification, and executing on said computer a tool that rewrites each description of a parameter in said library file using said set parameter value and producing a register transfer level design description.