This node USES XPath exclusively for its message processing transformation language.

该节点只使用XPath作为其消息处理转换语言。

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Typically this node allows the incoming message to be routed based on its content, where XPath is used as the expression language to query the content (message processing routing language).

通常，该节点允许根据内容路由输入消息，其中使用XPath作为表达式语言来查询内容(消息处理路由语言)。

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