当s CA运行时派生组件类型时，只有在那个合成文件中提升的服务和引用将被使用。
Only the services and references promoted in that composite file would then be used when the SCA runtime derives the component type.
外部映射文件使开发人员能够定制数据映射，从而获得对映射派生方式的更多控制。
The external mapping file enables developers to customize the data mapping and thereby gaining more control over the way mapping can be derived.
ACCTPROFILE表i d列的值是从输入文件的第一个字段派生出来的。
Values for the ID column of the ACCTPROFILE table are derived from the first field in the input file.
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