The Research On The Generation System Of Requirement Specification Based On Restricted Chinese Description

Software requirement analysis is the first step of software lifecycle. Requirement analysis plays an important role in modern software development. Computer aided requirement analysis is an important research field of CASE. Requirement analysis tool is used in the requirement analysis stage of software engineering. Its basic function is to assist system analyst to analyze the requirement of the developed system, and to get an intact and accurate software requirement specification which is made up of Data Flow Diagram and Data Dictionary finally. There are a lot of different kinds of requirement analysis tools at home and abroad. But these tools all assist requirement analysis either through figure mutual way or some strict formal language. The degree of specialization and formalization of these tools is too high, while the intelligence is not enough. They haven't the natural language interface, and thus cannot process the user's requirement described with some natural language.In view of the above question, we combine restricted Chinese which is introduce into requirement analysis with structured analysis to assist requirement analysis. The work of the paper is to research on the generation system of requirement specification based on restricted Chinese description. This system can automatically turn the requirement analysis report described by user with restricted Chinese to the software requirement specification accord with the national standard. The key of the work is natural language text understanding. At first system accomplishes Chinese language automatic word segmentation and Part-of-Speech tagging through Chinese input approach with word segmentation, then forms corresponding surface semantic network according to the semantic structure grammar, and finally gets corresponding Data Flow Diagram and Data Dictionary according to theautomatic generation algorithms of Data Flow Diagram and Data Dictionary,The whole completion of the work, can not only provide a description environment of natural language for CASE, but also develop into the system which takes the question described on the basis of the natural language as the system's input. The work of the paper is meaningful for the intellectuaiizatlon of CASE environment and software automation.