Retrieval, that is, checking and searching (checking and retrieving required text or information), refers to starting from the specific information needs of users, using certain methods and technical means for specific information collections, and based on certain clues and rules Find out relevant information.
Retrieval is a Chinese vocabulary, pinyin is jiǎn suǒ, which refers to using certain methods and technologies for specific information collections based on the specific information needs of users. Means to find relevant information based on certain clues and rules.
Retrieval and search synonyms.
Classification
Traditional document retrieval
Traditional document retrieval is often used The tool is an index card, which is to record the information of the literature on the index card. Index cards generally record the title, author, subject headings, abstract and other information of the document.
When searching for literature, you must first search the index, find its collection location, and then request the information.
Network Search
In the Internet age, we search all the time. There are two main ways to search on the Internet: directory browsing and using search engines.
The directory browsing method is the method used by Yahoo search engine. Users can click on the directory according to their own needs and go deep into the next sub-directory to find the information they need. This method is convenient for finding a certain type of information collection, but the ability to accurately locate it is not strong.
Search engine is the most commonly used network retrieval tool. Users only need to submit their requirements, and the search engine will return a large number of results. The results are sorted by relevance to the search question.
In addition to search engines, various databases ordered by libraries are also important ways of information retrieval. Thomas Mann, a reference librarian at the Library of Congress, introduced search methods such as keyword search, citation search, and relevance search.
For more related knowledge, please visit: PHP Chinese website!
The above is the detailed content of What does retrieval mean?. For more information, please follow other related articles on the PHP Chinese website!