But from our data model's perspective, there is no unique table we can use to create our foreign key constraint, like the one between TB_RIGHT and TB_PERSON.
但是从我们数据模型的角度来看，我们没有一个惟一的表可以用来创建我们的外键约束，就像TB_RIGHT和TB_PERSON之间那样。
Figure 8 shows how the transform can work together with a CSS file to create various form presentations based on the values in the XML Schema constraint file and a local metadata registry.
图8演示转换如何与CSS文件一起工作，从而根据XML Schema约束文件和本地元数据登记系统中的值创建各种表单控件。
Figure 4 describes the data flow used to create an XForms application by transforming the NIEM constraint document directly into the XForms document.
图4描述创建X Forms应用程序所用的数据流，这个过程将NIEM约束文档直接转换为X Forms文档。
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