把等价的简单正则路径表达式聚成一个等价类可以减少它的计算成本。
Clustering multiple regular linear path expressions into an equivalent class can help to decrease the cost of their evaluation.
各种XML查询语言的共同特点就是利用正则路径表达式(RPE)来导航XML文档的查询。
The common feature of the XML query languages is the use of regular path expressions (i. e. RPE) to query XML data.
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。
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).
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