Skyline queries have been a topic of intense study in the database area for over a decade now. Similarly, the top-k retrieval query has been heavily investigated by both the database as well as the web research communities. This tutorial will delve into the background of these two areas, and specifically focus on the recent challenges with respect to returning a small set of results to users, as well as requiring minimal intervention or input from them.
These are two main concerns with skylines and top-k respectively, and therefore have drawn a great deal of attention in the recent years with several interesting ideas being proposed in the research community. This tutorial will cover the current approaches to representative database selection. We will focus on both the theoretical models as well as the practical aspects from an industry standpoint.
The topics of covered in this tutorial will include identifying representative subsets of the skyline set, interaction based approaches, e-commerce product search, and leveraging aggregate user preference statistics.