RDF Site Summary
RSS (RDF Site Summary) 1.x is a parallel standard to RSS 0.9x and 2.x and was split off so that it could be based on RDF.
RDF Site Summary is a web service used for syndicating articles on web sites and blogs in a "latest news" manner.
Articles can afterwards be read using RSS Feed Readers like WinRSS or SharpReader without the need to check the corresponding web sites or blogs.
See Also: Really Simple Syndication - RSS 0.9x, Semantic Web, Atom/Echo, web syndication