Under the condition of unchanged classification and decision abilities, attribute reduction is to delete irrelative or unimportant attribute.

属性约简要求在保持知识库的分类和决策能力不变的条件下，删除不相关或不重要的属性。

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With the help of the database management subsystem, we could add, delete and update the classification information.

后台数据库管理子系统为维护分类资料数据库提供方便，可添加、删除、修改分类信息。

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With the help of the database management subsystem, we could add, delete and update the classification information.

后台数据库管理子系统为维护分类资料数据库提供方便，可添加、删除、修改分类信息。

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