DEEP WEB

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What is the Invisible Web? How can you find it online? What makes the Deep Web search engines and Invisible Web databases so special? Find out the answers to these questions and learn more about this section of the Web that's so much larger than what you can uncover with an ordinary Web search. The Deep Web is a mammoth resource that is mostly untapped. Learn how to discover Deep Web resources with this comprehensive, ultimate guide to searching the Deep Web's goldmine of information.

The Invisible Web

http://websearch.about.com/od/invisibleweb/The_Deep_Web_Find_Out_More_About_The_Deep_Web_Deep_Web_Search.htm

Invisible Web Search Engines - Learn More About Invisible Web Search Engines

http://websearch.about.com/od/deepwebsearchengines/Invisible_Web_Search_Engines.htm Invisible Web search engines scour parts of the Web that "regular" search engines don't even touch. Many individuals and institutions have put together invisible Web directories, which you can use as a jumping off point to surf the Invisible Web. The Deep Web is a vast, uncharted wonderland of information, and there are many tools and search engines out there that are attempting to mine it for you. Read my review of Turbo10, an Invisible Web meta search engine. CompletePlanet is an Invisible Web search portal with fast service, relevant results, and an easy to use interface. CompletePlanet searches over 70,000+ searchable databases and specialty search engines, a pretty impressive number.
http://dl.acm.org/citation.cfm?id=1860708&dl=ACM&coll=DL

Understanding deep web search interfaces

This paper presents a survey on the major approaches to search interface understanding. The Deep Web consists of data that exist on the Web but are inaccessible via text search engines. The traditional way to access these data, i.e., by manually filling-up HTML forms on search interfaces, is not scalable given the growing size of Deep Web. Automatic access to these data requires an automatic understanding of search interfaces. While it is easy for a human to perceive an interface, machine processing of an interface is challenging. During the last decade, several works addressed the automatic interface understanding problem while employing a variety of understanding strategies.