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Invisible web "There are parts of the Internet that search
engines simply can't see. The search engine's robotic "crawlers"
either miss or are locked out of these areas on the Internet. Behind the barriers
lie treasure troves of quality information. Collectively this informatin is called
the Invisible Web. http://21cif.imsa.edu/tutorials/micro/mmpdf/invisible.pdf - webpages
that have been deliberately excluded by owners - privacy issues
- webpages
that are dynamically assembled from online databse content (airline)
- password
protected services, databases and webpages (Groliers, Proquest)
- non-HTML
resources like some image, audio, animation and PDF files
"The Invisible
Web is a vast part of the Internet that the search engines can NOT—or simply
don't—include in their indexes of the Web (Gary Price) Information
and records only available from specialized searchable databases or directories
that can be searched via the web. (http://www.kn.pacbell.com/wired/21stcent/lsearch2.html) You
can get to the database, but you can't get into it - just with a search engine. Are
you aware that when you use a regular search engine, you are searching
less than 10% of the actual web? that the inaccessible part
of the web is 500 times larger than what is reached by regular search engines?
and that the web is now estimated to be 4 billion pages? and is growing
all the time? Illustration
of the content levels of the World Wide Web, including the Invisible web -
About.com Visible web versus Invisible web -
organizational chart Invisible web information - databases -
Fee based Databases @ St. Joseph's - paid subscriptions
book catalog - only available
@ St. Joe's encyclopedia databases magazine databases databases
@ Seattle Public Library - paid subscriptions / free to you databases
@ King County Library - paid subscriptions / free to you Free databases
- but they have a search system of their own - with ? in URL
- http://search.biography.com/print_record.pl?id=12594
- http://www.factmonster.com/search?fr=fmtn&query=cigarette+cards
"split level
searching" For the first level, search for the database site. For the second level,
go to the site and search the database itself for the information you want. How
to find information on the Invisible Web? Educational Cyber Playground
Subject directories - with sites chosen by people/experts - for broad
topics email listservs that list new sites Search engines designed
specifically to reach the invisible web (or search with Google, but add the
word database to your search terms)
Subject Directories/lists of links by subjects More information on the Invisible/Deep
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