Deepweb_searching.htm: The lore of searching: how to exploit the shallow deep_web, by fravia+ "the deep web: surfacing hidden value" GALE, A PART OF CENGAGE LEARNING, DIRECTORY OF ONLINE, PORTABLE, AND INTERNET DATABASES [230] Bluesheet Contents PDF version File Description [top] Gale Directory of Online, Portable, and Internet Databases provides detailed information on publicly available databases and database products accessible through an online vendor, Internet, or batch processor, or available for direct lease, license, or purchase as a CD-ROM, diskette, magnetic tape, or handheld product. Gale Directory of Online, Portable, and Internet Databases continues and expands upon the former Cuadra Directory of Databases, which was acquired by Gale Group in 1991. Gale Directory of Databases, Volume 1: Online Databases, Volume 2: CD-ROM, Diskette, Magnetic Tape, Handheld, and Batch Access Databases. Gale Directory of Online, Portable, and Internet Databases covers more than 24,000 databases and database products of all types in all subject areas produced worldwide in English and other languages by more than 4,000 database producers.
Tips [top] Subject Coverage [top] Records may be one of three types: Database. None. White Paper: The Deep Web: Surfacing Hidden Value. This White Paper is a version of the one on the BrightPlanet site. Although it is designed as a marketing tool for a program "for existing Web portals that need to provide targeted, comprehensive information to their site visitors," its insight into the structure of the Web makes it worthwhile reading for all those involved in e-publishing. —J.A.T. Searching on the Internet today can be compared to dragging a net across the surface of the ocean. While a great deal may be caught in the net, there is still a wealth of information that is deep, and therefore, missed.
The reason is simple: Most of the Web's information is buried far down on dynamically generated sites, and standard search engines never find it. Traditional search engines create their indices by spidering or crawling surface Web pages. To be discovered, the page must be static and linked to other pages. The deep Web is qualitatively different from the surface Web. The Deep Web How Search Engines Work Figure 1. In 1994, Dr. M. The Invisible Web Navigating the Web outside Traditional Search Engines. Search Strategies: Search with Peripheral Vision. The Five-Step Search Strategy We Recommend Don't assume you know what you want to find. Look at search results and see what you might use in addition to what you've thought of. Switch from search engines to directories and back. Search Strategies: Search with Peripheral Vision Copyright © 2012 The Regents of the University of California is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License.Permissions beyond the scope of this license may be available at.
0702103.pdf (application/pdf Object) Special: Seek and Ye Shall Find. Invisible Web: What it is, Why it exists, How to find it, and Its inherent ambiguity. What is the "Invisible Web", a.k.a. the "Deep Web"? 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. The first version of this web page was written in 2000, when this topic was new and baffling to many web searchers. Since then, search engines' crawlers and indexing programs have overcome many of the technical barriers that made it impossible for them to find "invisible" web pages.
These types of pages used to be invisible but can now be found in most search engine results: Pages in non-HTML formats (pdf, Word, Excel, PowerPoint), now converted into HTML. Why isn't everything visible? There are still some hurdles search engine crawlers cannot leap. The Contents of Searchable Databases. How to Find the Invisible Web Simply think "databases" and keep your eyes open. Examples: plane crash database languages database toxic chemicals database.