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News aggregator
In computing, a news aggregator, also termed a feed aggregator, feed reader, news reader, RSS reader or simply aggregator, is client software or a web application which aggregates syndicated web content such as online newspapers, blogs, podcasts, and video blogs (vlogs) in one location for easy viewing.
==Function==
Visiting many separate websites frequently to find out if content on the site has been updated can take a long time. Aggregation technology helps to consolidate many websites into one page that can show the new or updated information from many sites. Aggregators reduce the time and effort needed to regularly check websites for updates, creating a unique information space or ''personal newspaper''. Once subscribed to a feed, an aggregator is able to check for new content at user-determined intervals and retrieve the update. The content is sometimes described as being ''pulled'' to the subscriber, as opposed to ''pushed'' with email or IM. Unlike recipients of some ''push'' information, the aggregator user can easily unsubscribe from a feed.
Aggregation features are frequently built into web portal sites, in the web browsers themselves, in email applications or in application software designed specifically for reading feeds. The aggregator provides a consolidated view of the content in one browser display or desktop application. Aggregators with podcasting capabilities can automatically download media files, such as MP3 recordings. In some cases, these can be automatically loaded onto portable media players (like iPods) when they are connected to the end-user's computer.
By 2011, so-called ''RSS-narrators'' appeared, which aggregated text-only news feeds, and converted them into audio recordings for offline listening. The syndicated content an aggregator will retrieve and interpret is usually supplied in the form of RSS or other XML-formatted data, such as RDF/XML or Atom.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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