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How Internet Search Engines Work
●   Search the Internet for information
●   Work of search Engines
●   Search Engine gathers links of every home-
    pages
●   Index Structure
Search the Internet for information
●   When we search the for information,
    we use search engine. Search engine
    is search site that use keywords.
●   Search engine is very convenient
    because it use not only keyword but
    also date.
Work of search Engines
●   You search the database, and then Results are
    returned in HTML pages.
●   When you click a link to one of the documents,
    you are sent to that documents.
Search Engine gathers links of every
              home-pages.
Each search engine gathered each link of home pages and looks into each link on each
new home pages such as crawler or spider, but it ignore links that connected to graphics
and sound, animation files. Moreover, it ignores link to extend Internet resources like
newsgroups.
When it discovers documents and URLs, software agents are instructed to get the URLs
and documents to send information about them to indexing software.
Index Structure
The indexing software receives the documents and URLs from the agent.
The software extracts information from the documents and indexes by
putting the information into a database. Each search engine extracts and
indexes different types of information. Some index every word in each
document, for example but others index only the key 100 words in each.
The kind of index built detrermines what type of searching can be done
with the search engine and how the information will be displayed
References
●   Wikipedia http://en.wikipedia.org/
●   Medical Library Association
    http://www.mlanet.org/

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EP3 Week10 Presentation

  • 1. How Internet Search Engines Work ● Search the Internet for information ● Work of search Engines ● Search Engine gathers links of every home- pages ● Index Structure
  • 2. Search the Internet for information ● When we search the for information, we use search engine. Search engine is search site that use keywords. ● Search engine is very convenient because it use not only keyword but also date.
  • 3. Work of search Engines ● You search the database, and then Results are returned in HTML pages. ● When you click a link to one of the documents, you are sent to that documents.
  • 4. Search Engine gathers links of every home-pages. Each search engine gathered each link of home pages and looks into each link on each new home pages such as crawler or spider, but it ignore links that connected to graphics and sound, animation files. Moreover, it ignores link to extend Internet resources like newsgroups. When it discovers documents and URLs, software agents are instructed to get the URLs and documents to send information about them to indexing software.
  • 5. Index Structure The indexing software receives the documents and URLs from the agent. The software extracts information from the documents and indexes by putting the information into a database. Each search engine extracts and indexes different types of information. Some index every word in each document, for example but others index only the key 100 words in each. The kind of index built detrermines what type of searching can be done with the search engine and how the information will be displayed
  • 6. References ● Wikipedia http://en.wikipedia.org/ ● Medical Library Association http://www.mlanet.org/