There are lots of systems that follow this pattern, where you write some modules / components in source code then describe how they are connected using an external config file.
许多系统都遵循这种模式，在这些系统中，你编写一些模块/组件，然后通过一个外部配置文件定义他们之间的连接。
More often than not, you will deal with XML data originating from an external source-perhaps a flat file, perhaps a Web service, perhaps something else.
很多情况下您都需要处理来自外部源的XML数据——可能来自平面文件、Web服务或其他源等。
You may notice from the source code that the data in our model is coming from an external XML file.
您可能注意到了，在源代码中模型中的数据来自外部XML文件。
This data source can be a collection of test data objects, external file or maybe even a database.
数据源可以由测试数据对象，外部文件，或者数据库组成。
This data source can be a collection of test data objects, external file or maybe even a database.
数据源可以由测试数据对象，外部文件，或者数据库组成。
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