"Pro Web 2.0 Mashups: Remixing Data and Web Services"
This search functionality is also available from the Google AJAX Feed API.9 Some have used general-purpose search engines to search for feeds, but it??™s hard to say how reliable such self-described hacks are.10 It seems sensible that if you know the URL of a web page, you should be able to easily figure out the URL for any feeds that are associated with it. Indeed, amechanism called RSS autodiscovery (or more generally, feed autodiscovery) has become a de facto standard in associating web pages with feeds. To connect a web page to a feed, you add elements to the element, making appropriate use of the rel, href, and type (and optionally title) attributes of : ??? rel is set to the value alternate. ??? href is the URL of the feed. ??? type is set to the MIME type of the feed (either application/rss+xml or application/atom+xml). ??? title is optionally set to be a title of the feed. For example, in the following element: http://news.yahoo.com you find the following , which points to a corresponding RSS feed at http://rss.news. yahoo.com/rss/topstories: href="http://rss.news.yahoo.com/rss/topstories" /> Many of the modern browsers support feed autodiscovery. If you use any of those browsers to go to a web page with a link to its feeds, you??™ll see an icon that leads to those feeds.