The World Wide Web Consortium (W3C) announced a W3C Feed Validation Service, a free online tool which helps check the syntax of syndication feeds in formats such as RSS and Atom. This service is based on the open source software feedvalidator (the same software running the service at feedvalidator.org). Feedvalidator was written by Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda and is under development over at sourceforge. In addition to the existing features of the feedvalidator, the W3C has made available a SOAP web service for the W3C feed validation service, and hopes that it will be a useful resource for the automatic or batch validation of feeds. This service is, for the moment, still quite experimental, and may have bugs or problems. http://validator.w3.org/feed/