使用此对话框将一个表中的主键映射到另一个表中的外键。

Use this dialog box to map a primary key in one table to a foreign key in another.

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从这段代码中可以看出，它定义了如何将一个方法映射到一个特定的表和列上，并指定哪些列是主键、查找方法，等等。

You see that it defines how to map each method to a particular table and column and specifies which columns are primary keys, finder methods, and so on.

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描述符也可以提供与注释相同的有关实体的元数据信息，如主键字段，以及对象之间的任何映射。

The descriptor can also provide the same metadata information about the entities as annotations, such as primary key field, and any mappings between objects.

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