| The Unified Modeling Language (UML), which is designed by Rational Software Corporation and its partners , provides system architects working on object analysis and design with one consistent language for specifying, visualizing, constructing and documenting the artifacts of software systems. UML is the convergence of best practices in the object-technology industry. And it is a rich, precise, extensible modeling language for object-oriented system development and software developing automation environments. UML is the representation of excellent software engineering methodology which is approbated in large-scale and complex modeling field. Although system development flow is the background of UML applciation, UML is only a standard modeling language and not a standard development flow. Different organizations and different application field has different development process. During the course of software developing, requirement analysis is a decisive step. The lemma of this article is to discuss UML application on requirement analysis and construct a model based on it. Finally, this thesis uses DEVELOPMENT OF REMOTE EDUCATION SYSTEM OF CHINA AGRICULTURAL UNIVERSITY as a example to explain how to use this model.
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