Périodiquement, nous avons droit à l'un ou l'autre lancement d'un outil de recherche fédérée: exemple avec Alpha (en version beta), proposé par Yahoo!

Voir dans les FAQs:

Alpha is a new beta product from Yahoo! that introduces the concept of Federated Search. With Alpha, you can search across many different search indices all on one page. Also, if you have a Yahoo! ID, you can log in to personalise your experience by moving the search sources around to suit you, or adding completely new ones of your own.

Alpha utilises the OpenSearch (voir ici | ici | ici) format to read and present search results from any site that chooses to syndicate their results. Much like the way MyYahoo! can read news feeds via RSS, Alpha can read search results via OpenSearch RSS.

Via Search Engine Watch Blog