中文摘要：

从遗留信息系统中获取领域信息是创建领域本体的重要环节，也是设计知识重用的有效方式。以常用的关系模式为研究对象，分析如何从遗留系统中识别关系模式的结构信息，在此基础上，提出了12条术语转换规则，根据转换规则从关系模式的结构信息中逆向提取领域术语及相互关系，为领域本体的创建奠定了基础。

英文摘要：

It is a key issue for ontology development to acquire domain information hidden in legacy systems by reusing the existing design knowledge. This paper, taking relational database as example, analyses how to identify the information about the structure of relational schemes in legacy systems, presents 12 transformation rules, according to which terms and relations between them can be obtained from the relational schemes in reverse way. And uses the extension entity relationship （EER） diagram to further get semantic information from relational schemes for refining ontology model.