Deep web search: an overview and roadmap

摘要: We review the state-of-the-art in deep web search and propose a novel classification scheme to better compare systems. The current binary (surfacing versus virtual integration) hides number of implicit decisions that must be made by developer. make these explicit distinguishing 7 system aspects describe terms its functionality (what it can, what cannot do) solution specific problem. then motivate need for which has single-field free-text query interface supports real-time structured over multiple sources. To this end, we discuss two possible federated architectures state scientific challenges. Finally, present findings our ongoing project briefly outline related work interfaces data.