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What does "document retrieval" mean?
"Information retrieval" refers to the process of obtaining documents according to the needs of study and work. Modern times think that literature refers to articles and books with historical value or important books and materials related to a certain subject? With the development of modern network technology, literature retrieval is more accomplished by computer technology.

document retrieval

Information retrieval refers to the process of obtaining documents according to the needs of study and work. In modern times, literature refers to articles, books or important books and materials related to a certain subject with historical value [1]? With the development of modern network technology, literature retrieval is more accomplished by computer technology.

Chinese name literature retrieval mbth information retrieval

1 literature:

The development of literary concepts has gone through three stages:

It was first seen in the Eight Letters of The Analects of Confucius, which was interpreted by Zhu in the Song Dynasty as: the text refers to ancient books, and the sages are familiar with historical facts. [2]?

Modern times are generally understood as articles and books with historical value or important books and materials related to a certain subject.

Modern scholars believe that literature is the carrier to record human knowledge and information. It consists of four elements: document content, carrier material, information symbol and recording method.

2 literature grade classification:

(1) zero-order literature

Refers to the document form that has not been officially published or formed into a formal carrier. Such as letters, manuscripts, meeting minutes, notes, etc.

Features: objectivity, fragmentation and immaturity. Generally, it is obtained by oral conversation, visiting exhibitions and attending reports. , not only has certain value in content, but also can make up for the time-consuming shortcomings of general public documents from the objective formation of information to public dissemination.

Refers to the original documents without any processing, such as experimental records, manuscripts, original audio recordings, original video recordings, conversation record, etc. Zero-level documents play an important role in the preservation of original documents, the verification of original data and the verification of original ideas (owners).

(2) Original documents

(First-class literature): refers to the literature created or written by the author based on his own research results, regardless of whether he refers to or quotes other people's works when creating, and regardless of the material form in which the literature appears, it belongs to the first-class literature. Most articles published in journals and papers published in scientific and technological conferences belong to one document.

(3) second-hand literature

(Second-level literature): refers to the product obtained by a literature worker after processing, refining and compressing a document, and is a tool document edited, published and accumulated for the convenience of managing and utilizing a document. Retrieval reference books and online retrieval engines are typical secondary documents.

(4) Three documents

(Level 3 document): refers to the product of extensive and in-depth analysis and research on related level 1 and level 2 documents. Such as encyclopedias, dictionaries and electronic encyclopedias.

3 search:

(1) Narrow-sense retrieval refers to the process of finding and obtaining specific related documents from a large number of organized related literature collections according to certain methods. The literature collection here is not the literature itself, but the information or clues about the literature.

(2) retrieval in a broad sense includes two processes: information storage and retrieval. Information storage is to gather a large number of disordered information, systematize and order it according to the appearance and content characteristics of information sources, and build a database or retrieval system with retrieval function according to certain technical requirements for people to retrieve and use. And retrieval refers to the use of compiled retrieval tools or retrieval systems to find out specific information that meets the requirements of users.

4 computer literature retrieval:

The method of literature retrieval by using computer technology and modern retrieval means such as CD-ROM and Internet. Computer information retrieval, like manual retrieval, should be regarded as a basic skill of future scientific and technological personnel, and the training and cultivation of this ability is extremely important for scientific and technological personnel to adapt to the future society and cross-century scientific research. A researcher who is good at obtaining documents from electronic information systems must have more chances of success than those who do not have this ability. The American periodical POV, which reports the new lifestyle, also lists interactive network retrieval experts as one of the top ten hot jobs in the future. All these situations show that computer literature retrieval is becoming more and more important, so it is worth giving this technology to everyone.

5 literature retrieval methods:

(1) direct method

Also known as ordinary method, it refers to the method of directly using retrieval system (tool) to retrieve literature information. It is also divided into sequential investigation, reverse investigation and spot check.

(2) Follow-up method

Sequential retrieval method refers to the method of using retrieval system to retrieve literature information from far to near in time sequence. This method can collect systematic documents of a certain discipline and is suitable for document retrieval of larger disciplines. For example, if we know the initial age of a subject and need to know the whole process of its development, we can use the sequential search method to search from the initial age.

(3) Backward search method

Reverse search method is a kind of literature retrieval method which uses retrieval tools from near to far, from new to old, and relative to time. Using this method, you can get the latest information as soon as possible.

(4) Sampling method

Spot check method refers to the characteristics of the project, selects the most likely or most likely time period of document information related to the project, and uses retrieval tools to carry out key retrieval.

(5) backtracking method

It refers to the method of tracing the original texts (cited documents) one by one without using the general retrieval system, and then expanding the scope of literature information one by one from the list of references listed after these original texts, and tracing them one by one. It can snowball and get better retrieval results according to the citation relationship between documents.

(6) Cycle method

Also called subsection method or synthesis method. It uses direct method and backtracking method alternately in stages to learn from each other's strong points and cooperate with each other to obtain better retrieval results.

reference data

Encyclopedia of Literature Retrieval:/item/%E6% 96% 87% E7% 8c% AE% E6% A3% 80% E7% B4% A2/2826202? Fr = Aladdin