By defining the query language and mapping language, it generates the mapping rules. With replacing the global query by the mpping rules, the query generates the subquery finally.
以XML为基础,通过定义查询语言和映射语言,模式匹配分解,生成映射规则集合,用映射规则替换全局查询最终生成子查询。
参考来源 - 数据集成中基于XML的查询重写研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
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