首先，我们创建一个基础或者对象模型，从分析需求、访问定义，以及数据提取的列映射开始。
First, we cover creating an infrastructure or an object model that starts with a request, access definition, and column maps for data extraction.
创建的模型可以被分析，并作为代码生成(如下所示)的基础被使用。
The created models can be analyzed and used as a basis for code generation (see below).
您看到了首先解决数据实例（模型）创建，然后作为补充在此基础上解决用户界面控件（视图）创建问题的好处。
You learned the advantages of addressing the creation of a data instance (the model) first and addressing the creation of user interface controls (the view) only upon completing that task.
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