What is Web Searching?
- An act of looking for information in computer database or network (web).
- A web search engine is a software system that is designed to search for information on the World Wide Web. Thesearch results are generally presented in a line of results often referred to as search engine results pages (SERPs).
Web searching categories.
- Directories
- a website where different resources are gathered.
- Enormous collections of links to sites, arranged in different categories.
- The top level is typically a wide range of very general topics.
- Each topic contains hyperlinks of more specialised sub topic.
- Popular Directory:
- AOL- http://www.aol.com/
- Excite- http://www.excite.com/
- Lycos- www.lycos.com
- Yahoo!- www.yahoo.com
- Hotfrog- http://www.hotfrog.com.au/
- Search Engines
- A computer program that does the following:
- Allows user to submit a query that consists of a word or phase.
- Searches the database.
- Returns a list of suitable URLs which match your query.
- Allows user to revise and resubmit.
- Meta-search Engines
- A meta-search or all-in-one search engine performs a search by the use of more than one other engine to complete the search job.
- http://metasearch.com/
- Yellow Pages
- Yellow pages allows user to lookup information about individuals.
- We can use yellow pages to track down the telephone numbers, email address.
- Yellow pages contain information about businesses.
What is Web Browser?
- Can be defined as a software application used to locate and display web.
- Popular browser
- IE (Internet Explorer)
- Nestcape
- Mozilla Firefox
- Safari
- Opera
- Mosaic and etc
Searching Techniques
- Pattern Matching Queries
- Boolean Queries
Searching: How does it work?
- User Interface- Allows you to type a query and displays the results.
- Searcher- The engine searches the database for matching your query.
- Evaluator- The engine assigns scores to the retrieved information.
- Gatherer- The component that travels the WEB, and collects information.
- Indexer- The engine that categorizes the data collected by the gatherer.
Web Resources Evaluation
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