The common feature of the XML query languages is the use of regular path expressions (i. e. RPE) to query XML data.
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。
Clustering multiple regular linear path expressions into an equivalent class can help to decrease the cost of their evaluation.
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.
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。
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