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Internet searchingnewver


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  • Explain that the information on the web won’t be arranged in any way (very different from library arrangement)
  • Transcript

    • 1. Add Your Company Slogan Internet Searching
    • 2. Group Members Nashfa1 Zabir2 Visala3 Azhar4 Zaha5
    • 3. Contents Introduction1 Directories2 Search Engines3 MetaSearch Engines4 Search Strategies5
    • 4. Introduction With the arrival of the WWW came the widespread availability of online information Answers to your questions are somewhere on the web, but how do you locate them?
    • 5. DIRECTORIES • Method of finding and organizing web information • Offers a hierarchical representation of hyperlinks to web pages and presentations broken down to topics and subtopics • Review and classified by human editors
    • 6. Directories : classification General Specialized •Also called web directory or subject directory •Top level provides a wide range of broad topics. E.g. Music / Entertainment. •Also called subject guides or gateway pages •Deals with a variety of topics. E.g. law, medicine. Benefits Easy to use Need not know what you are looking for
    • 7. Search Engines : introduction • A computer program • Submit a query describing the information you want to locate • Searches its databases to try and match your query • Collates and returns a list of URL’s which matches your query • Permits you to revise and resubmit a query
    • 8. Search engines : classification General Specialized •Also called vertical search engine or a topic search engine •Retrieves information from a database that contains information on a wide variety of topics •Provides in-depth information on specific topics that may be valuable •Exists for a multitude of topics •MP3s •Shopping •News etc Not as easy to use as directories. WHY??
    • 9. Metasearch Engines • Does not have their own database of information • Calls many search engines to do the actual work Advantage: You can access a number of different search engines with a single query Disadvantage: You will get a lot of results which will not be of interest to you. Therefore you will spend a lot of time evaluating the results and deciding which link to follow
    • 10. Directories and search engines : Popular MetaSearch Engines Directories Search Engines
    • 11. Boolean Queries : AND operator A A A A A A A A A A A A B B B B B B B B B B B B
    • 12. Boolean Queries : OR operator A A A A A A A A A A A A B B B B B B B B B B B B
    • 13. Search Strategies • Determine which search engine • Possesses a user-friendly interface • Has a easy-to-understand, comprehensive documentation • Is convenient to access; that is you do not have to wait several minutes before being able to submit a query • Contains a large database • Does a good job in assigning relevancy scores
    • 14. Exercise
    • 15. THANK YOU