查询转换模块也是通过访问映射知识库的信息来完成XML查询到SQL查询的转换。

The mapping repository is also accessed by the query-translate module, which generate SQL queries from XML queries.

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接着重点研究了知识库的设计，包括语义库、映射库和规则库。

Then we focus on the knowledge base design and analysis, including the semantic base, mapping base and rule base.

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映射知识以特征为对象按面向对象技术表达和组织，由系统知识库和过程知识库共同驱动双向特征映射的实现。

Mapping knowledge is represented and organized by means of Object-Oriented technique. System KB and procedure KB drive the two-way feature mapping.

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