学习如何在数据库中生成feed和Web服务，在应用程序层查询和组合它们，然后在客户机浏览器中显示它们。
You'll learn how feeds and Web services are generated in the database, queried and combined in the application layer, and then presented in the client browsers.
本文将描述如何通过组合现有的Web服务开发简单的Web应用程序；您还将学习到如何使用同一个实现定义和部署新web服务。
This paper describes how you can develop a simple web application by composing existing web services; you will also learn how to define and deploy a new web service using the same implementation.
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