Last, the data model is coupled with the topology handler to read initial instance values into the data model.

最后，数据模型还与拓扑处理程序连接起来，以将初始实例的值读取到数据模型中。

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A form's data model (how it behaves when data is submitted, initial values, and more) is separated from its presentation.

表单数据模型(数据提交时的行为、初始值等)和表示分离开来。

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The TopologyHelper class is provided to help set up initial values in your data model.

TopologyHelper能够帮助在数据模型中设置初始值。

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