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Presentation 10all
1. How Internet Search Engines Work
● Crawler and Spider
● The Indexing Software
● Meta Search Engines
● The Relation Between Search Engine and
DataBase
2. Crawler and Spider
● System that is called a search
engine to retrieve the homepage
that increases rapidly exists now.
● The Crawler-Based Search Engine
exists in the search engine.
● It is a system that computer that is
called the robot, the crawler and
Spider automatically regular goes
round a server all over the world by
the computer and puts the
information gathering and the
index.
● However, there is a fault that tens
of 10000 information becomes a hit
to this method at time, too.
3. The Indexing Software
● The software extracts information from the
database.
● The database that collected, analyzed and made
an index from web pages and documents by
crawler.
● The software makes index different type of
information.
● The software extracts information by some
index.
4. Meta Search Engine
●The search engine of the type to display the result that the
meta search engine transmits input keyword to plural
search engine, and was provided.
● There are two Types;
● “Non-integration model” - It choose a search object site
● “Unification model” - It integrates search results with
one page and displays it
5. The relation between search engine and data base
● The data base is search based on the key words provided.
– The result is presented as a HTML document.
– The presentment is different in search engine.
● Case 1 : Several sentence on the page are displayed with the
URL.
● Case 2 : The title and the URL are displayed.
● In the database, it doesn't have the document but the URL.
