http://radio.weblogs.com/0001161/ This trail lists some useful resources for those interested in finding out more about RSS search engines. en-gb Copyright 2003, David Davies' Weblog d.a.davies@bham.ac.uk d.a.davies@bham.ac.uk RSS versions have a complicated history beyond the scope of this simple trail. This version is widely supported by aggregators and weblogs. http://backend.userland.com/stories/rss091 This version of RSS conforms to the W3C's RDF Specification and is extensible via XML-namespace and/or RDF based modularization. http://www.purl.org/rss/1.0/spec This is the latest version of RSS supported by UserLand's popular weblogging tool, Radio UserLand. http://backend.userland.com/rss A sensible introduction to RSS written by Mark Pilgrim. http://www.xml.com/pub/a/2002/12/18/dive-into-xml.html Brand new O'Reilly book by BenÝHammersley. This book will likely become required reading for those interested in the development of RSS as a content syndication file format. http://www.oreilly.com/catalog/consynrss/index.html?CMP=IL7015 A useful collection of links to some RSS resources. http://backend.userland.com/directory/167 An up to date list on the state of the art of RSS search engines maintained by David Davies. http://backend.userland.com/directory/167/searchEngines