您必须定义输入和输出，然后才能关联表单，如图9所示。
You must define inputs and outputs before you can associate a form, as shown in Figure 9.
因此，当用按钮提交表单时，关联的方法就会被调用（假设所有验证无误）。
Thus, when the form is submitted with the button, the associated method gets invoked (assuming that all validation is ok).
此次分析的目的是提取表单的关联规则。
The analytical goal is to extract association rules of the form.
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