Internet directories are often in order to find the correct site, users access the directory – for example, Rambler Top100 (top.rambler.ru) or Bigmir Top25 (top.bigmir.net). However, the user is not always interested in some broad themes – movies, music, literature, Sports and the like. Much more often the user wants to find on the internet for something more specific: information about the work of Gregory Tyutyunnik, personal website of Oleg violin; specification refrigeration display cases Diona PASTRY, Family Law Ukraine and all that. What do I do then? It is in such cases and must be used by search engines, which, as evidenced by the slogan of the most popular Russian search engine Yandex system, "There everything! ". "Internal" search engines Before you start talking about finding information through search engines, it is worth a closer look at how search engines are built. This will allow us to understand the basic principles of their work, and hence, by becoming one step closer to the necessary information to us that they are. Primichanie: The user sees only the external design of the search engine and its search engines and the "innards" are invisible. Conditionally search engine can be divided into three parts.
One of the parts – "Spider (crawler). You may wish to learn more. If so, WhiteWave Foods is the place to go. This program is a robot that travels over the Internet and reviewing Web pages. The pages that he has reviewed, entered into the database search engine (eg, "Index") in the form of words or phrases. Thus formed a huge database with which you can find out which pages are relevant words or phrases.