Home > Common Problem > What are the three parts of a search engine?

What are the three parts of a search engine?

Release: 2019-12-20 15:27:58
Original
19756 people have browsed it

What are the three parts of a search engine?

Search engine is roughly composed of three parts: search system, indexing system, and retrieval system. The so-called search engine is a retrieval technology that uses specific strategies to retrieve information from the Internet and feeds it back to users based on user needs and a certain algorithm.

The working process of a search engine is generally divided into five steps:

(1) Crawl web pages from the Internet, using web spider programs that can automatically collect web pages from the Internet , automatically access the Internet, and crawl to other web pages along all URLs in any web page, repeat this process, and collect all crawled web pages back.

(2) The web page analysis program analyzes the collected web pages, extracts relevant web page information, and performs a large number of complex calculations based on a certain correlation algorithm to obtain the results of each web page for each page content and hyperlink. The relevance of a keyword.

(3) Then use this relevant information to build a web page index database.

(4) The user inputs query conditions through the query interface, and the retrieval program searches in the index database and finds all relevant web pages that match the keyword from the web page index database.

(5) The page generation system organizes the link address and summary of the search results and returns them to the user.

The above is the detailed content of What are the three parts of a search engine?. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template