It defines an XML language for defining regular expressions for the lexical representation of new types.

它定义了一种xml语言，可用于定义新类型的词汇表示的正则表达式。

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It defines an XML language for defining regular expressions for the lexical representation of new types.

它定义了一种xml语言，可用于定义新类型的词汇表示的正则表达式。

youdao