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Common search engine principles

Everyone in the computer field has heard of a search engine. A search engine is basically a program that is designed to search all the documents in the internet for some specific keywords. The search engine then produces the list of documents wherein these keywords are found.

There are some common search engine principles that are used to activate the search engine. When you use a search engine, it first sends out a spider whose job is to collect many documents with the related keyword as possible. The spider can be compared to a web browser; however the difference lies in the fact that the web browser shows all the information of a page while the spider has no visual components. It works with the HTML code of the page.

The next program you find is the crawler that helps to find links on each page. It is with the help of the crawler that the spider knows where to go. Following these links, the crawler can find documents that were till then not found on the search engine. Then it is the indexer that analyzes each page and each part of the page like headers, text, special HTML tags, etc. These three programs collectively constitute the common search engine principle.

There are some crawlers that are better than the ordinary crawlers. These crawlers do a deep crawl on the website to access as many pages as possible which contain the keywords that are mentioned in the search engine. These deep crawlers can also gather pages that have not been submitted too! However, it is always better to search on larger search engines; as the larger is the search engine, the higher the number of pages that are listed on the site. There are some search engines that can follow frame links, and some that can’t. So it is better to use search engines that follow frame links as it provides for complete search of your web page.

Crawlers are found in crawler-based search engines where the listings are created automatically. However, there are also human powered directories where it depends on humans for its listings. There are also hybrid search engines that work on a combination of both of these types of search engines. Some of their searches are created automatically while some depend on humans.

Search engines have a large database that is used for the storage of downloaded and processed pages. It is usually referred to as the index of the search engine. Next in line in common search engine principles is the results engine. This is the program that extracts the search results from the database to rank pages. It is through this program that the order of the pages that best match the user’s query is arranged. There are ranking algorithms of the search engine that have to be followed to arrange the web pages orderly.

The next important part of the search engine is the web server. It is the web server that is responsible for all the interactions between the user and other search engine components. The search engine web server comes with a HTML page which has an input field. It is through this input field that the user can actually specify the exact query or information he/she is searching for. The web server has another search engine need to fulfill, and that is to display all search results related to the needs of the user in the form of a HTML page.

By following the common search engine principles and organizing your website according to these principles, you can surely place your website on the top listing of search engines.

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