The application is in two parts: a simple blogging application that saves the contents of the blog as an XML file and another part that reads the XML file and republishes it as an RSS feed.

应用程序分为两部分：一部分是一个简单的blog应用程序，它将blog的内容保存为XML文件；另一部分读取XML文件，并将其重新发布为rss提要。