This paper introduces Distribution Automation System firstly. Then the paper expounds that it is significant to develop Configuration Software in China.In the main part of this paper, the paper discusses one important part of Configuration Software-Command Language System. The paper analyzes the needs of system firstly. Then, on the base of the results of the system analyzing, the paper provides a new way of the developing of Command Language System- Object-Oriented Way and describes the system by UML. Furthermore, the paper designs the structure and the arithmetic of interpreter. In order to realize the connecting with other parts, the paper designs the interfaces of system, including the interface to Edit System, the interface to Run System, the interface to Real~Time Database and the interface to Graph System.At last, the system is realized successfully. Therefore, the way and the contents of this paper are significant to the developing of Configuration Software and automation engineering.
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