Efficient Indexing for Diverse Query Results

This paper examines the problem of computing diverse query results which is useful for browsing search results in online shopping applications. The search results are diversified wrt a sequence of output attributes (termed d-order) where an attribute that appears earlier in the d-order has higher priority for diversification. We present a new indexing technique, D-Index, to efficiently compute diverse query results for queries with static or dynamic d-orders. Our performance evaluation demonstrates that our D-Index outperforms the state-of-the-art techniques developed for queries with static or dynamic d-orders.