Following the processing model of the language, it first locates the template rule for processing the root node of the input tree.

按照语言的处理模型，它首先查找处理输入树根节点的模板规则。

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In this example, the first template rule matches every text node in the input document.

在本例中，第一个模板规则匹配输入文档中的每个文本节点。

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The first rule ensures that the mice device node appears exclusively in the /dev/input directory (by default it would be at /dev/mice).

第一条规则确保鼠标设备节点一定出现在/dev/input目录下(缺省是在/dev/mice下面)。

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