Crosswalks between the deep web and the surface web

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The "Deep Web," also known as the "Invisible Web" or "Hidden Web," represents the hidden segment of the Internet, offering high-quality information that is largely inaccessible through standard search engines like Google or Yahoo. This vast area primarily consists of databases, with only a small fraction visible on the "Surface Web," which is the portion indexed by general search engines. The book explores strategies for creating "crosswalks" between the Deep Web and the Surface Web, facilitating access to valuable resources. It classifies various search tools capable of retrieving information from the Deep Web and provides practical examples of solutions in use. By examining these connections, the book aims to enhance users' ability to navigate and utilize the rich information available beyond the reach of conventional search engines, ultimately bridging the gap between these two distinct realms of the Internet.