Proceedings of the 2nd International Workshop on Information Heterogeneity and Fusion in Recommender Systems

The 2nd International Workshop on Information Heterogeneity and Fusion in Recommender Systems (HetRec 2011) was held in Chicago, IL, USA, on the 27th of October 2011, under the frame of the 5th ACM Conference on Recommender Systems (RecSys 2011). HetRec workshop represented a meeting point for researchers and practitioners interested in addressing the challenges posed by information heterogeneity in recommender systems and studying information fusion in this context. In this second edition, we made available on-line datasets with heterogeneous information from several social systems. These datasets could be used by participants to experiment and evaluate their recommendation approaches, and can be enriched with additional data, which may be published at the workshop website for future use. These datasets are kindly hosted by GroupLens research group at University of Minnesota. A total of ten papers were presented at the workshop. There were six long papers, and four short papers. Fourteen submissions were received, and each of them was reviewed by two members of the Program Committee.