The RDF (or RSS 1.*) branch includes the following versions: Later versions in each branch are backward-compatible with earlier versions (aside from non-conformant RDF syntax in 0.90), and both versions include properly documented extension mechanisms using XML Namespaces, either directly (in the 2.* branch) or through RDF (in the 1.* branch). "The Myth of RSS Compatibility", an article written in 2004 by RSS critic and Atom advocate Mark Pilgrim, discusses RSS version compatibility issues in more detail.
The extension mechanisms make it possible for each branch to copy innovations in the other.
Winer published a modified version of the RSS 0.91 specification on the User Land website, covering how it was being used in his company's products, and claimed copyright to the document.
This new version, which reclaimed the name RDF Site Summary from RSS 0.9, reintroduced support for RDF and added XML namespaces support, adopting elements from standard metadata vocabularies such as Dublin Core.
which allows users to access updates to online content in a standardized, computer-readable format.
An RSS document (called "feed", "web feed", or "channel") includes full or summarized text, and metadata, like publishing date and author's name.A standard XML file format ensures compatibility with many different machines/programs.RSS feeds also benefit users who want to receive timely updates from favourite websites or to aggregate data from many sites.This has fueled ongoing controversy in the syndication development community as to which entity was the proper publisher of RSS.One product of that contentious debate was the creation of an alternative syndication format, Atom, that began in June 2003.The browser can also be commanded to automatically download the new data for the user.