Historical Background
نویسنده
چکیده
Definition Metasearch is to utilize multiple other search systems (called component search systems) to perform simultaneous search. A metasearch engine is a search system that enables metasearch. To perform a basic metasearch, a user query is sent to multiple existing search engines by the metasearch engine; when the search results returned from the search engines are received by the metasearch engine, they are merged into a single ranked list and the merged list is presented to the user. Key issues include how to pass user queries to other search engines, how to identify correct search results from the result pages returned from search engines, and how to merge the results from different search sources. More sophisticated metasearch engines also perform search engine selection (also referred to as database selection), i.e., identify the search engines that are most appropriate for a query and send the query to only these search engines. To identify appropriate search engines to use for a query requires to estimate the usefulness of each search engine with respect to the query based on some usefulness measure.
منابع مشابه
Historical background of strategic culture of "egalitarianism" in foreign policy of Shah Abbas Safavi
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