Fig. 1

The framework of OSIR. The blue arrows denote the data flow and their ranking results. The green arrows represent the support from the database and algorithm. Given a user query and preference weight specification, first, the ranking list with the semantic ranking function is learned by our OMKR model. Then, the semantic ranking is fed into the preference modeling, and we obtain a set of preference ranking lists by preference re-ranking. These ranking lists including the semantic ranking results are aggregated with our position-sensitive rank aggregation technique. The ranking results that aggregate both semantics and preference information are finally returned to the users