You can create WSDL files yourself and generate a skeleton of your service from the WSDL files, then write application code in the skeleton; this is known as top-down development.

您可以自己创建WSDL文件，也可以从WSDL文件生成您的服务的骨架，然后在这个骨架中编写应用程序代码；这称为自顶向下开发。

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Next, continue the top-down development approach by beginning to implement the mediation flow component by creating a new implementation.

接下来，继续进行自上而下的开发方式，通过创建一个新的实现来开始实现中介流组件。

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We also hope to coordinate this article with a separate one on code generation tools that make top down development using EJBs really easy.

我们还希望将此文章进行整理，单独写一篇有关代码生成工具的文章，使得使用EJB进行自顶向下开发真正手到擒拿。

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But a clutch of Western development officials I've been talking to all acknowledge that the "Madonna Incident" points towards a more general shift - already in progress - away from the top-down aid of past decades and towards a new focus on policy development, partnership and business.

BBC: Madonna, Malawi and the infamous attack