These resulting RSS feeds are called Pipes and they allow you to do things like find all of the parks in your city or convert the news to Flickr photos.
Recent Updates02.07.07: What Is Pipes?Pipes is a hosted service that lets you remix feeds and create new data mashups in a visual programming environment. The name of the service pays tribute to Unix pipes, which let programmers do astonishingly clever
A. Ebersbach, M. Glaser, und R. Heigl. UTB UVK Verlagsgesellschaft, Konstanz, 2. überarb. Edition, (2010)noch nicht erschienen, laut Verlag für Sept 2010 geplant.