Recommender Systems, Semantic-Based.

Glossary Collaborative filtering: a recommendation method which is based on rating information of the user community Content-based filtering: a recommendation method which is based on characteristics of the recommended items as well as individual user feedback Hybrid recommender system: a recommender system that combines different recommendation approaches or data sources Rating matrix: a grid containing the users' implicit or explicit item ratings Cold start problem: the ramp-up phase of a recommender where preference data is missing