path expression

The Equivalence Between Path Expression and Type 3 Grammer

路径表达式与3型文法之间的等价性

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Program path expression is an path representation method in path testing.

程序路径表达式是路径测试中路径的一种表示方法。

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To do this simply, use a wildcard (*) in the path expression.

为了简单起见，可以在路径表达式中使用一个通配符。

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Path expression is one of the core components of most XML query languages, and many evaluation methods for path expression queries are proposed recently. However, there are few researches on the issue of path expression optimization.

路径表达式作为XML数据查询语言的核心部分，关于它的计算方法的研究成果已有很多，然而针对路径表达式本身进行优化的研究却相对较少。

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