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By mitchp
via architects.dzone.com
Published: Nov 19 2012 / 08:08

Recommendation systems seek to predict the 'rating' or 'preference' that a user would give to an item (such as music, books, or movies) or social element (e.g. people or groups) they had not yet considered. Some techniques work well with explicit ratings e.g. movies, music while others do well with implicit ratings e.g. page views, clicks, etc.
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