RSS 1.0 differs fundamentally from RSS 2.0 and Atom, because it follows the rules of the Resource Description Format of the World Wide Web Consortium (http://www.w3.org/RDF/). RDF is supposed to allow machines to automatically correlate the information contained in an RSS document with the information from other RDF-conformant documents, and to process them together. This means that the machine behaves as if it could understand the information and draw conclusions. RDF belongs to the family of "artificial intelligence".
What should it look like when machines automatically correlate information from web documents? A simple example is the connection of information from RSS documents with information from Friend-of-a-Friend (FOAF;