Transcript Chapter 6: Search Engines and Portals

Chapter 6
Search Engines and Portals
Agenda
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Search engines
Intelligent network agents
Portals
Discussion
Search Engines
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Online service
Program
Usage
Add information
Improving search position
Type
Online service
• Crawlers (World Wide Worm): database
with web contents
• Web directories: webmaster or directory
maintainer
• Meta search engines: database with search
engines
Program
• Name
– Crawlers
– Robots
– Spiders
• Function
– Update database
– Site mirroring activities: reduce load & information
copying
• Robot Exclusion Standard
– User-agent: *
– Disallow: /cgi-bin/
Usage
• Crawlers
– Large number of web page with many different
aspects
• Directories
– Some good pages
• Meta search
– Mixture of the above
Adding Information
• Webmaster submission
• Search keywords by crawler
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Web contents
Title of web page
Domain name
URL
• Number of links pointing to the page
Improving Search Position
• Meta-data (keywords) in meta-tags within
the head-tag
• Check the higher ranked web-site’s contents
and HTML codes
• Tracking and advice programs
• Update and Resummit
Type
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Keywords
Natural language
Image search
Multi-languages
– Cross-language: translation
– Multi-lingual
Agenda
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Search engines
Intelligent network agents
Portals
Discussion
Intelligent Network Agents
• Name
– Knowbots: little robots that gather information on a
network
• Functions
– Collect update data
– Classify data
• Types
– E-mail
– News
– Personal shopping
Agenda
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Search engines
Intelligent network agents
Portals
Discussion
Portals
• Definition
• Type
• Feature
Definition
• World Wide Web site that is or proposes to
be a major staring site for users when they
connect to the Web or that users tend to visit
as an anchor site
• Fast, reliable and simple to use site for
news, information, links, and services
Type
• Groups
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Online services
Search engines and directories
Software distribution sites
Sites offering free services
• Types
– Horizontal (different topics)
– Vertical (particular audience)
Feature
• Interesting and unique content
• A good search engine
• Easy navigation
– Zones (channels or guides)
• Add useful services
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Web space
Free e-mail
Chat rooms
Newsgroups
Free software
Entertainment and/or game
Online shopping
Up to date news
Online help
Agenda
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Search engines
Intelligent network agents
Portals
Discussion
Discussion
• How do you use search engine, intelligent
agent or portal in your e-business?
Points to Remember
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Search engines
Intelligent network agents
Portals
Discussion