Research shows that the current relational database technology often inefficient when deal with the regular path expression.

研究表明，当前的关系数据库技术在处理规则路径表示的查询时通常效率不高。

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XML query includes content query and structural query. The query condition can be represented as a simple path expression (SPE) or a regular path expression (RPE).

XML查询包含内容查询和结构查询，其查询条件可表示为简单路径表达式(SPE)和正则路径路径表达式(RPE)。

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At first, an algorithm is proposed, which rewrites a regular path expression based XML query as a group of simple path expression based queries using mapping information (mapping graph).

首先提出了一个利用映射信息(映射图)将带正则路径表达式的XML查询重写为一组简单路径查询的算法。

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