Note that setting a namespace context does not cause the namespace declarations to be written out — it just defines the prefix bindings.

注意设置一个名称空间的上下文不会写出名称空间声明——它仅定义前缀绑定。

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The connector prefixes these with a string that can be configured by setting the connector source context property prefix for Expression Columns.

连接器为这些数字添加一个字符串前缀，该字符串可以通过设置连接器源上下文属性Prefix for Expression Columns进行配置。

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