searchengine-131017055103-phpapp02

7/24/2019 searchengine-131017055103-phpapp02

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SEARCH ENGINE

Submitted by,

E.Priyan,Pondicherry University.


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Search Engine

A search engine is a !eb"based too# thatenab#es users to #ocate in$ormation on the%or#d %ide %eb. Po&u#ar e'ames o$ search

engines are Goog#e, (ahoo), and *SN Search.Search engines uti#i+e automated so$t!area&ications re$erred to as robots, bots, ors&iders- that trave# a#ong the %eb, $o##o!ing

#ins $rom &age to &age, site to site. /hein$ormation gathered by the s&iders is usedto create a searchab#e inde' o$ the %eb.


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0eatures o$ Search Engine

1 A true search engine is an automatedso$t!are &rogram that moves around the %ebco##ecting %ebPages to inc#ude in its cata#og

or database.1 It searches !hen an user re2uests in$ormation

$rom a search engine3 not the entire %eb.

1 Each search engine has its o!n cata#og or

database o$ co##ected %ebPages, so you !i##get di4erent resu#ts5hits by using di4erentsearch engines.


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Ho! 6o Search Engine %or7

Every search engine uses di4erentcome' mathematica# $ormu#as togenerate search resu#ts.

Search engine a#gorithms tae the eye#ements o$ a !eb &age, inc#uding the&age tit#e, content and ey!ord density,and come u& !ith a raning $or !here to

ace the resu#ts on the &ages.

Search engine8s a#gorithm is uni2ue.


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/y&es o$ search engines9

1 /here are three main ty&es o$ searchengine too#s9

: Search directories or inde'es

: Hybrid search engines

: *eta search engines


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Ho! Are /hese /oo#s 6i4erent7

1 A search engine ty&e is determined by ho! thein$ormation contained in its cata#og or database isco##ected

1 /he sites in the cata#og or database o$ a search

directory or inde' are com&i#ed by humans3 not anautomated so$t!are &rogram

1 Some search directories or inde'es do not considercontent !hen adding &ages to their cata#og. ;thers

co##ect, rate or ran materia#s. Some searchdirectories inc#ude annotations that eva#uate,revie!, or other!ise describe the content.


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searchengine-131017055103-phpapp02