RSS is a family of XML file formats for web syndication used by news websites and weblogs. The abbreviation stands for one of the following standards:
• Rich Site Summary (RSS 0.91)
• RDF Site Summary (RSS 0.9, 1.0 and 1.1)
• Really Simple Syndication (RSS 2.0)
RSS provides short descriptions of web content together with links to the full versions of the content. This information is delivered as an XML file called RSS feed, webfeed, RSS stream, or RSS channel. In addition to facilitating syndication, RSS allows a website's frequent readers to track updates on the site using a news aggregator.
Usage
RSS is widely used by the weblog community to share the latest entries' headlines or their full text, and even attached multimedia files. (See podcasting, broadcatching and MP3 blogs.)
In 2004 and 2005, after several years of use by early adopters, use of RSS spread to many major news organizations, including Reuters, the Associated Press and the BBC. Under various usage agreements, providers allow other websites to incorporate their "syndicated" headline or headline-and-short-summary feeds.
A program known as a feed reader or aggregator can check RSS-enabled webpages on behalf of a user and display any updated articles that it finds. It is now common to find RSS feeds on major web sites, as well as many smaller ones.
Client-side readers and aggregators are typically constructed as standalone programs or extensions to existing programs like web browsers.
Web-based feed readers and news aggregators require no software installation and make the user's "feeds" available on any computer with Web access. Some aggregators syndicate (combine) RSS feeds into new feeds, e.g. take all football related items from several sports feeds and provide a new football feed. There are also search engines for RSS feeds like Feedster, Technorati, Pluck or Plazoo.
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