它的各个类和接口为数据流提供了系统输入和输出。
Its various classes and interfaces provide for system input and output for data streams.
这些输入和输出可以是纯控制流链接(类似于上一部分中的模型)，也可以是类似于图5所示的数据流链接。
The inputs and outputs can be pure control-flow links as in the models in the previous section, or can be data flow links as shown in Figure 5.
确认该数据流操作符的输出包括 ID 列和原始 XML 输入列。
Verify that the output of this data flow operator includes the ID column as well as the original XML input column.
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