The only use case I have been able to come up with for this transaction attribute is for testing.
我能想到的针对此事务属性的唯一一个用例就是用于测试。
2
Because you're testing for the data type anyway, you can also create an attribute that stores the cell's data type information.
因为总是要测试数据类型，所以也可以创建一个属性用于存储单元格的数据类型信息。
3
For example, if an event contains an xsi: type attribute identifying its payload, and different kinds of events have different types, testing this attribute may be all that's needed.