PubSubHubbub: Content Syndication
The PubSubHubbub (Publisher-Subscriber Hub) protocol seeks to define how content systems syndicate user correspondence from a source site to a number of subdelivery sites. Using this method, sites can augment their comments with syndicated feeds from other sites, giving their users a much wider range of social interaction than they would experience from a single source.
Applying a distributed approach to server-to-server communication, a centralized hub between a provider and subscriber acts as a communication channel between the two. This makes it easier for a single provider to produce updates to content, as those updates will be syndicated out to many different subscribers at the same time, keeping each source in sync.
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