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Advance Search Engine


Search engines have become such an integral part of our lives that at least one organized game has evolved around this tool. Searching through an index involves a user building a query and submitting it through the search engine. The query can be quite simple, a single word at minimum. Building a more complex query requires the use of Boolean operators that allow you to refine and extend the terms of the search.

The Boolean operators most often seen are:

  1. AND - All the terms joined by "AND" must appear in the pages or documents. Some search engines substitute the operator "+" for the word AND.
  2. OR - At least one of the terms joined by "OR" must appear in the pages or documents.
  3. NOT - The term or terms following "NOT" must not appear in the pages or documents. Some search engines substitute the operator "-" for the word NOT.
  4. FOLLOWED BY - One of the terms must be directly followed by the other.
  5. NEAR - One of the terms must be within a specified number of words of the other.
  6. Quotation Marks - The words between the quotation marks are treated as a phrase, and that phrase must be found within the document or file
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