摘要: A methodology is proposed for the formal development of software systems from a user's requirements specification in natural language into complete implementation, proceeding through steps specification, and detailed design implementation an automated manner. Our based upon theories two-level grammar (TLG) object-oriented takes advantage existence several existing tools. We develop iterative transformation process final with environment to assist user, as well designer accomplishing this transformation. underlying may also be used implementation. This major advance engineering general.