Reference Work Entry

Encyclopedia of Social Network Analysis and Mining

pp 1501-1510

Date:

Recommender Systems, Semantic-Based

  • Fatih GedikliAffiliated withDepartment of Computer Science, TU Dortmund
  • , Dietmar JannachAffiliated withDepartment of Computer Science, TU Dortmund

Synonyms

Social Recommender System; Tag-based recommendation; Web 2.​0 recommender systems

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

Definition

Recommender systems (RS) are software tools that are predominantly used on e-commerce sites and for other online services as a means to help the online customer find the most relevant shopping items or pieces of information quickly. Today, such systems can be found for a variety of different domains such as books, movies, music, hotels, restaurants, or news.

The particularity ...

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