When developing or improving an information system, is specialists need not possess in-depth knowledge of the organizational environment in which the system is located.
当开发或改进信息系统的，是专家，不必具备深入了解该组织的环境，使系统的地点。
The part presents the definition of requirement modeling research of information system. It introduces two basic modeling methods: method based on environment case and on knowledge.
该部分主要是提出了信息系统需求建模的定义，介绍了需求建模的的两种基本方法：基于情景实例的方法和基于知识的方法。
The part presents the definition of requirement modeling research of information system. It introduces two basic modeling methods: method based on environment case and on knowledge.
该部分主要是提出了信息系统需求建模的定义，介绍了需求建模的的两种基本方法：基于情景实例的方法和基于知识的方法。
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