Text Documents
نویسندگان
چکیده
The World Wide Web has become the largest information source in recent years, and search engines are indispensable tools for finding needed information from the Web. While modern search engine technology has its roots in text/information retrieval techniques, it also consists of solutions to unique problems arising from the Web such as web page crawling and utilizing linkage information to improve retrieval effectiveness. The coverage of the Web by a single search engine may be limited. One effective way to increase the search coverage of the Web is to combine the coverage of multiple search engines. Systems that do such combination are called metasearch engines. In this chapter, we describe the inner workings of text retrieval systems, search engines, and metasearch
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