[Demo] From del.icio.us to x.qui.site: recommendations in social tagging sites

Abstract : We present x.qui.site, a scalable system for managing rec- ommendations for social tagging sites like del.icio.us. seam- lessly incorporates various user behaviors into the recom- mendations and aims to recommend not only items of in- terest, but also other relevant information like interesting people and/or topics. Explanations are also provided so that users can obtain a better understanding of the recommenda- tions and decide which recommendations to pursue further. We discuss the technical challenges involved in character- izing different user behaviors and in efficiently computing recommendation explanations.