RSS Cloud
Encyclopedia
RSS Cloud is an extension to the RSS
RSS
-Mathematics:* Root-sum-square, the square root of the sum of the squares of the elements of a data set* Residual sum of squares in statistics-Technology:* RSS , "Really Simple Syndication" or "Rich Site Summary", a family of web feed formats...

 protocol that enables realtime (immediate) push notifications
Push technology
Push technology, or server push, describes a style of Internet-based communication where the request for a given transaction is initiated by the publisher or central server...

 or distributed publish/subscribe
Publish/subscribe
Publish–subscribe is a messaging pattern where senders of messages, called publishers, do not program the messages to be sent directly to specific receivers, called subscribers. Published messages are characterized into classes, without knowledge of what, if any, subscribers there may be...

 communication for feeds
Data feed
Data feed is a mechanism for users to receive updated data from data sources. It is commonly used by real-time applications in point-to-point settings as well as on the world-wide web. The latter is also called Web feed. News feed is a popular form of Web feed. RSS feed makes dissemination of blogs...

. This is done using a element where more information is given on how a subscriber should request updates. RSS Cloud is not limited to RSS feeds but can also be used with other feed formats such as Atom
Atom (standard)
The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol is a simple HTTP-based protocol for creating and updating web resources.Web feeds allow software programs to check for updates published on a...

. On September 7th 2009 WordPress
WordPress
WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...

 became the first large supporter of the protocol, enabling the tag for over 7.5 million hosted blogs on WordPress.com
WordPress.com
WordPress.com is a weblog hosting provider owned by Automattic which opened to beta testers on August 8, 2005 and opened to the public on November 21, 2005. It is powered by the open source WordPress software...

 .

Another protocol providing roughly the same is PubSubHubbub. Contrary to RSS Cloud, PubSubHubbub push notifications include content of the updated feed entries and do not unsubscribe after 25 hours.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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