[attachment=3142]

SEMINAR ON INTERNET SEARCHING

---

PRESENTED BY:-
AVIPSA PUROHIT
REGD NO-0601208347

---

CONTENTS
INTRODUCTION
OVERVIEW
SEARCH TOOLS
SEARCH ENGINES
MAJOR SEARCH ENGINES
HOW GOOGLE WORKS
BENEFITS OF SEARCH ENGINES
LIMITATIONS OF SEARCH ENGINES
CONCLUSION
INTRODUCTION
Internet searching is a process in which we are able to find required informations(like text
documents,images,videos etc) in the internet using different search tools.
SEARCH TOOLS
Search Engines
Meta-search Engines
Subject Directories
Specialist Databases
SEARCH ENGINES
Search engines are programs that allow the user to enter keyword that are used to search a
database of web pages. It can search in a 4 step process.
Crawling the Web, following links to find pages.
Indexing the pages to create an index from every word to every place it occurs.
Ranking the pages so the best ones show up first.
Displaying the results in a way that is easy for the user to understand.
Cont™d¦
Meta-search engine:-A meta search engine is a search tool that doesn't create its own database of
information, but searches those of other engines and provide comprehensive results.Eg-
SurfWaxhttp://surfwax.com
Subject directories:-Subject directories organize sites by subject, allowing users to choose a
subject of interest and then browse the list of resources in that category. Eg- Google Directory
http://directory.google.com
Specialist Database:-Specialized databases are indexes that can be searched, much like the search
engines. It is mainly collection on a particular subject. Eg-Librarianâ„¢s Index to the Internet
http://lii.org
MAJOR SEARCH ENGINES
Google
http://google
AltaVista
http://altavista
alltheweb
http://alltheweb
HOW GOOGLE WORKS

How Google creates the index and the database of documents that it accesses
when processing a query .

Google has three distinct parts :-
Googlebot, a web crawler that finds and fetches web pages.
The indexer that sorts every word on every page and stores the resulting index of words in a huge
database.
The query processor, compares your search query to the index and recommends the documents which is
most relevant.
Cont™d¦

Googlebot
Google indexer
Googlebot gives the indexer the full text of the pages it finds. These pages are stored in Googleâ„¢s
index database.
This index is sorted alphabetically by search term,and storing a list of documents in which the term
appears.
Googleâ„¢s Query Processor
The query processor has several parts, including the user interface (search box), the engine that
evaluates queries and matches them to relevant documents, and the results formatter.
GOOGLEâ„¢S QUERY PROCESSOR
BENEFITS OF SEARCH ENGINES
The indexes of search engines are usually vast, representing significant portions of the Internet,
offering a wide variety and quantity of information resources.

The growing sophistication of search engine software enables us to precisely describe the
information that we seek.

The large number and variety of search engines enriches the Internet, making it at least appear to
be organized.

LIMITATIONS OF SEARCH ENGINES
They do not crawl the web in real time.
If a site is not linked or submitted it may not be accessible.
Not every page of a site is searchable.
Special tools needed for the Invisible/Deep Web.
Few search engines search the full text of Web pages.
CONCLUSION
The primary goal is to provide high quality search results over a rapidly growing World Wide Web.
Follow standards for search forms.
Balance information and clarity for results.
Index everything, hide obscure stuff.
Use search query features wisely.
Adjust results to fit your situation.
REFERENCES
http://google
http://searchtools
http://wikipedia
http://searchenginewatch
http://searchengineshowdown
http://searchiq
http://metacrawler
http://infoseek.com
Kansas City Public Library http://kcpl.lib.mo.us/search/srchengines.html
ANY QUERIES?
THANK YOU