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Searching Information

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General Steps

• Identifying Key Words, Synonyms, and Key Phrases

• Constructing an effective search statement• Advance search/boolean operators

– With all of the words (AND)– With the exact phase– With any of the words (OR)– Without the words (NOT)

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Search Engine

• An Internet software program that creates huge databases of web documents

• Examples: Google, AltaVista– No search engine indexes the entire web – Not all search engines are updated in a timely

manner

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Search Engines Definition

• (Internet) Search engines that are used for searching information from web pages / websites in the internet

Search engine used within an organization/institute is called enterprise search engines e.g. Public Libraries

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History

• History • Google (1998)– most popular– renowned by its simple interface and

relevant search results– Keyword search

• Yahoo Search (2004)• MSN Search (2005)• Baidu (1999)

– most popular in China

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Principle: Web crawler (Web spider,Web robot)

• program or automated script which browses the World Wide Web in a methodical, automated manner.

• mainly used to create a copy of all the visited pages for later processing by a search engine

• The result – a listing of “best match” web pages that match the query keywords and are more relevant, popular or authoritative than others

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Search Directory

• Internet directories begin with broad categories and become more specific as you descend in to the hierarchical list.

• Examples: Yahoo, Yahooligans, KidsClick.

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Metasearch Engine

• A search engine that searches multiple search engines simultaneously

• Examples: Dogpile, Ixquick, Vivisimo.

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Information Literacy Issue!

• spamdexing – Techniques employed by some Web markete

rs and site designers in order to fool a search engine's spider and indexing programs. The objective is to ensure that their Web site always appears at or near the top of the list of search engine results.

Source: http://www.answers.com/topic/spamdexing