Ó 2002 Prentice Hall                                                                     2
Searching the Web
*Search engines
§produce a list of pages that match a keyword
§they are built around a database that catalogs
Web locations based on content
*Directory or Subject Tree
§A hierarchical catalog of Web sites
*Natural Language Search Engines
§Allows users to ask for what they want
 
“The ability to ask the right question is more than half the battle of finding the answer.”
Thomas J. Watson