Web feed
Web feed
From Wikipedia, the free encyclopedia
A web feed is a document (often XML-based) which contains content items, often summaries of stories or weblog posts with web links to longer versions. Weblogs and news websites are common sources for web feeds, but feeds are also used to deliver structured information ranging from weather data to "top ten" lists of hit tunes. The two main web feed formats are RSS (which is older and far more widely used) and Atom (a newer format that has just completed the IETF standardization process.)
The terms "publishing a feed" and syndication are used to describe making available a feed for an information source, such as a blog. Like syndicated print newspaper features or broadcast programs, web feed contents may be shared and republished by other web sites. (For that reason, one popular definition of RSS is Really Simple Syndication.)
More often, feeds are subscribed to directly by users with aggregators or feed readers, which combine the contents of multiple web feeds for display on a single screen or series of screens. Depending on the aggregator, subscription is done by manually entering the URL of a feed, by clicking a feed: link in a web browser or by various other methods.
Web feeds are designed to be machine readable, so there is no requirement that they be destined only for human readers. For example, business partners could use web feeds to exchange sales data or other information without any human intervention.
Web feeds are most commonly found in various RSS formats or the standardised Atom format.
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