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Web Location Services

Web Location Services. Historical Background. In use up to 1996. An internet server from which hierarchically-organised text files could be retrieved from allover the world. Developed at the University of Minnesota, whose sports teams are called “The Golden Gophers”.

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Web Location Services

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  1. Web Location Services

  2. Historical Background In use up to 1996 An internet server from which hierarchically-organised text files could be retrieved from allover the world. Developed at the University of Minnesota, whose sports teams are called “The Golden Gophers” HyperGopher could also display Gif and Jpeg graphic images. Three important Gopher applications were Veronica, Archie and Jughead (named after comic characters!) Lost its importance and relevance with the introduction of the first graphical browser, Mosaic GOPHER Late 80's

  3. Historical Background GOPHER A Gopher Application software

  4. Historical Background 1991 Pronounced : “Ways” Co-existed with the Gopher technology Files had to be stored in a predetermined manner in databases The WAIS user had to connect to known databases in order to retrieve information or files Had the same fate as Gophers – became superfluous with the introduction of browsers and search engines W.A.I.S. Wide Area Information Servers

  5. Historical Background W.A.I.S. Wide Area Information Servers The primitive XWAIS

  6. Historical Background Databases W.A.I.S. An improved user interface Wide Area Information Servers

  7. Historical Background W.A.I.S. The Windows version Wide Area Information Servers

  8. Web Location Services Catalogue Search Engine

  9. A proper search engine

  10. Yahoo actually uses Google for its search engine! An example of a catalogue

  11. More of a complete front end for the internet than just a search engine! MSN is another such site

  12. Spiders or crawlers normally start out with a historical list of links, such as server lists, and lists of the most popular or best sites, and follow the links to these pages to find more links to add to the database. A search engine needs to employ a Web Crawler (a sub group of “software agents”) with an unusual degree of autonomy! These are referred to as “Bots” (short for robots), and “Spiders” How they work. In a nutshell

  13. Yes unfortunately this theme enters the realm of Search Engines too! There is a strong rumour that Search Engine companies sell their information about you. Just think – you have recently made a search for hotel quotes and suddenly you start receiving emails advertising hotels and holidays. Is it really a coincidence? Privacy and security Privacy and security Privacy and security Privacy and security Privacy and security Privacy and security Privacy and security

  14. <html> <head> <title>My World</title> </head> <body> <p align="center"><font size="7">Welcome to My World</font></p> </body> </html> Such an html code would give the following search result: My WorldWelcome to My World Fixing this using Meta Tags: <html> <head> <title>My World</title> <meta name="description" content="Everything you ever wanted to know about stamps from prices to history."> <meta name="keywords" content="stamps, stamp collecting, stamp history, stamp prices, stamps for sale."> </head> </html> The search result this time will be: My WorldEverything you wanted to know about stamps, from prices to history. Example: Example: Example: Example: Meta Tags …allow the owner of the page to specify key words and concepts under which the page will be indexed.

  15. Complex searches  And: All the terms joined by “AND” must appear in the pages or documents. Some search engines substitute the operator “+” for the word AND  OR: At least one of the terms joined by “OR” must appear in the pages or documents  NOT: The term or terms followed by “NOT” must not appear in the pages or documents. Some search engines substitute the operator “-” for the word NOT  Followed by: One of the terms must be directly followed by the other

  16. Complex searches  Near: One of the terms must be directly followed by the other.  Quotation marks: Words between quotation marks are treated as a phrase, and that phrase must be found within the document or file.

  17. Site search engines Search engines that return results from a particular website only Usually created by programs that generate a Java Script code One such program is SearchMaker Pro

  18. Site search engines

  19. Sample code generated by SearchMaker Pro <HTML> <HEAD> <SCRIPT language=JavaScript> <!-- // Script generated by Search Maker Pro: seaRchmAker=new Array();seaRchmAker[1]=new Array……………… seaRchmAker[16]=new Array("http://www.geocities.com/powerpoint95forschool/quizcorrect.htm","New Page 1","","Use your browser's Back button please! ");seaRchmAker[17]=new Array("http://www.geocities.com/powerpoint95forschool/quiz3wrong.htm","New Page 1","","Use your browser's Back button please! &nbsp; ");seaRchmAker[18]=new Array("http://www.geocities.com/powerpoint95forschool/shotGallery.htm","ScreenShots","","Move your mouse to the left-hand side of the screen to access your menu. &nbsp; &nbsp; ");seaRchmAker[19]=new Array………………

  20. Site search engines Webmaster utility sites like Bravenet.com and Cgispy.com offer their services to create a site search engine…for free.

  21. If you know of a specialized search engine such as SearchNetworking that matches your subject (for example, Networking), you'll save time by using that search engine. A good ferret program is Copernic 2001 downloadable from http://www.copernic.com Searching Tips If Yahoo doesn't turn up anything, try AltaVista, Google, Hotbot, Lycos, and perhaps other search engines for their results. Depending on how important the search is, you usually don't need to go below the first 20 entries on each. For efficiency, consider using a ferret that will use a number of search engines simultaneously for you. If there isn't a specialized search engine, try Yahoo. Sometimes you'll find a matching subject category or two and that's all you'll need.

  22. Another similar ferret software is WebFerret by ZDNet – downloadable for free. Searching Tips

  23. Searching Tips If you feel it's necessary, also search the Usenet newsgroups. As you continue to search, keep rethinking your search arguments. What new approaches could you use? What are some related subjects to search for that might lead you to the one you really want? At this point, if you haven't found what you need, consider using the subject directory approach to searching. Look at Yahoo or someone else's structured organization of subject categories and see if you can narrow down a category your term or phrase is likely to be in. If nothing else, this may give you ideas for new search phrases.

  24. Curiosities

  25. http://www.altavista.com Hell-bent in indexing anything and everything! Over 30 million pages indexed! (until July 96)

  26. http://www.excite.com Claims to have indexed even more pages than Alta Vista

  27. http://www.opentext.com Indexes the full text of less than a million pages (until May 96), but stores more URL’s

  28. http://www.hotbot.com Claims that it can grow with the web and index it entirely no matter how big!

  29. http://www.google.com Uses multiple spiders – up to 4 at a time! At peak performance the system could crawl over 100 pages per second generating around 600 kilobytes of data per second!

  30. http://www.googlewhack.com It is simply an online game using Google! When this happens it is called a Pure Whack. The contestant can then submit it to www.googlewhack.com where it will be posted. The contestant types two words in Google and hopes to receive ONE result only. One such Pure Whack is the result of the search for “ambidextrous scallywags”!

  31. The World Wide Web Worm Which used to be available at the following address: http://wwww.cs.colorado.edu/home/mcbryan/WWWW.html For more information go to the following URL: http://www.inf.utfsm.cl/~vparada/html/wwww.html#instr First Seach Engine!

  32. The End

  33. Definition A Search Engine proper is a database and the tools to generate that database and search it.

  34. Definition A Catalogue is an organisational method and a related database, plus tools for generating it.

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