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The Invisible or Deep Web

The Invisible or Deep Web. What is it? The "visible web" is what you can find using general web search engines . It's also what you see in almost all subject directories . The "invisible web" is what you cannot find using these types of tools. . Why?.

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The Invisible or Deep Web

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  1. The Invisible or Deep Web • What is it? • The "visible web" is what you can find using general web search engines. It's also what you see in almost all subject directories. The "invisible web" is what you cannot find using these types of tools.

  2. Why? • Because the crawler programs cannot type or think, they cannot enter passwords on a login screen or keywords in a search box. Thus, these databases must be searched separately.

  3. Google Scholar: A special case

  4. Google Scholar • Google Scholar is part of the public or visible web. It contains citations to journal articles and other publications, with links to publishers or other sources where one can try to access the full text of the items. This is convenient, but results in Google Scholar are only a small fraction of all the scholarly publications that exist online. Much more - including most of the full text - is available through article databases that are part of the invisible web. The WBAIS Library subscribes to a number of these, accessible to our students, faculty, staff, and on-campus visitors through the library web page.

  5. Excluded Pages • Search engine companies exclude some types of pages by policy, to avoid cluttering their databases with unwanted content.

  6. They are: • Documents of limited interest • Pages deliberately excluded by their owners. A web page creator who does not want his/her page showing up in search engines can insert special "meta tags" that will not display on the screen, but will cause most search engines' crawlers to avoid the page.

  7. How to find the “invisible” Web? • Simply think "databases" and keep your eyes open. You can find searchable databases containing invisible web pages in the course of routine searching in most general web directories. Of particular value in academic research are: • ipl2 • Infomine

  8. Remember that the Invisible Web exists. • In addition to what you find in search engine results (including Google Scholar) and most web directories, there are other gold mines you have to search directly. • This includes all of the licensed article, magazine, reference, news archives, and other research resources that libraries buy for those authorized to use them.

  9. Resources • UC Berkley Library. Finding Information on the Internet- http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/InvisibleWeb.html Pictures: • Google Images: • fatgeorge.co.uk • newhelicoptergames.com • library.yale.edu • dennisclausen.dk

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