请注意，我们在各层之间使用了虚线，来表示所有可能的继承关系的连接。
Please note that we used dotted lines between the layers to represent connections representing all possible inheritance relationships.
它不从连接工厂继承；不过，其缺省值为“YES”，所以它并不包括在示例定义中。
It does not inherit from the connection factory; however, it does default to the correct value of "YES" so it is not included in the sample definitions.
对setup的专门调用将连接到数据库，为每个表设置一个类，然后让那些类去继承Maypole： Model： CDBI。
That single call to setup will connect to the database, set up a single class for each table, and cause those classes to inherit from Maypole: : Model: : CDBI.
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