Chinese Library Classification is a method of book classification in China. Broadly speaking, it includes the book classification of Renmin University of China Library and the map of China Academy of Sciences.

Book Classification, Chinese Library Book Classification, Taiwan Province Lai Yongxiang Imitation Decimal Classification (so-called "China Book Classification") and International Book Integration Classification. China Library Classification in a narrow sense is the abbreviation of China Library Classification, which is a common tool for book classification in China at present. If readers master the relevant knowledge of this classification, they can quickly and effectively search the collections of libraries all over the country. Basic structure of classification (1) Basic categories: For example, China Library Classification is divided into five categories: Marxism-Leninism, Mao Zedong and Deng Xiaoping; Philosophy; Social science; Natural science; Comprehensive books. (2) Basic category: the first category that constitutes the classification table. There are 22 basic categories in China Library Classification. (3) Summary table: a list of categories formed by basic categories and the first and second categories directly developed by them. For example, (4) Detailed list: A category list consisting of various registered categories expanded by a brief list is the real basis for document classification.

Development and evolution

China Library Classification (formerly known as China Library Classification) is a representative large-scale comprehensive classification compiled and published after the founding of the People's Republic of China, and it is also the most widely used classification system in domestic libraries today, referred to as Chinese Library Classification.

The fourth edition was published in 1999. The fourth edition of the revised China Library Classification has added the category of classified materials, which is distinguished from the category of classified books by a "+",so it was officially renamed as China Library Classification, with the abbreviation unchanged. The fourth edition of Library Classification of China comprehensively supplements new themes, expands the category system, and makes the classification keep pace with the development of science and technology. At the same time, standardize categories, improve the reference system and annotation system, adjust the category system, and add sub-tables, so as to obviously strengthen the expansion of categories and the accuracy of classification.

Outlook of the fifth edition

The editorial board of China Library Classification held a meeting on the validation of the fifth edition of China Library Classification in Xiamen on May 6-8, 20 10. The meeting was presided over by Wang, vice chairman of China Library Classification, and 33 members from all over the country attended the meeting. The theme of this meeting is that all members of the editorial board will finalize the fifth edition of China Library Classification and then publish it. At the meeting, editor-in-chief Wang made a report on the revision of China Library Classification, and deputy editor-in-chief Bu Shuqing made a picture of the revision meeting of China Library Classification.

Technical and content reports. This paper summarizes the work and existing problems in the revision and investigation stage, division of labor revision stage and summary and approval stage of China Library Classification, and explains the key revision categories and contents of the fifth edition. The fifth edition of China Library Classification added more than 1630 categories, deactivated and deleted about 2,500 categories, and revised about 5,200 categories. Major categories involving politics, economy, culture, life and computer technology have been partially adjusted and emphatically revised. , including adjusting or adding category system, modifying class names and comments, etc. Subsequently, the members carefully reviewed the preprint and electronic system of the fifth edition of China Library Classification, and had a heated discussion on the setting of Class A, the revision of Class A names, the use of marks in the classification table, the increase of category marks, etc., and fully discussed the controversial issues and reached an understanding of * * *. The meeting held that the application environment, content characteristics and carrier types of literature resources have changed greatly since the fourth edition of China Library Classification was published ten years ago. Classification has not only continued its shelving function in libraries, but also become a tool for classified retrieval, knowledge organization, subject information portal and end users. According to the principle of keeping pace with the development of knowledge and the convention of the revision cycle of International Classification, the revision of China Library Classification is necessary and timely. The guiding ideology and principles of revision determined by the editorial board of China Library Classification are appropriate, and the revision procedures and main technical methods are operable. The fifth edition of China Library Classification deals with the key and hot issues that have been discussed for a long time. By modifying the class name, expanding the extension of the category and increasing the use of comments, the content of the category theme is enhanced, and the meaning and usage of the category are clarified. In the fifth edition, the use marks such as re-division and imitation division are added, which improves the cross-reference notes of categories. At the same time, it inherits the methods of adding evolution notes, deleting and changing categories in the fourth edition, which greatly improves the practicability of the category table. The meeting held that the revised China Library Classification has more characteristics of the times and can better meet the indexing and retrieval requirements of comprehensive literature information resources. The whole modification was successful and achieved the expected effect. In this revision, 34 members and consultants from 26 units undertook the revision task, and nearly 100 experts from 58 units participated in the revision work. Therefore, the fifth edition of China Library Classification is the crystallization of the work achievements and wisdom of colleagues all over the country. Finally, editor Wang made a concluding speech, and thought that the executive meeting of the editorial board should finalize the issues raised at this meeting as soon as possible, and submit the fifth edition of China Library Classification and its final approval opinions to the National Library Committee for approval, so as to publish the fifth edition of China Library Classification as soon as possible. At the same time, the next step is deployed, including compiling the fifth edition of China Library Classification, and publishing a series of editions of China Library Classification, such as simplified edition, periodical edition, electronic edition, online edition and search engine edition. I hope members will continue to actively participate and cooperate. In the fifth edition, more than 1630 categories were added, about 2,500 categories were deactivated and deleted, and about 5,200 categories were modified. The connection between the old edition and the new edition is based on scientific division under the premise of changing the coding of the old edition and the present situation of book inventory. Other classifications and the old version of China Library Classification should be revised in time, and the old and new versions should be staggered to avoid getting into deep trouble. According to the existing bibliographic query system, even if there is no classification misplacement, it can be found as long as it is coded. The Library Classification of China is revised every five years.

Edit the classification system of this paragraph.

According to the characteristics of books and materials, the classification system is determined according to the principle of compiling from total to sub-division and from general to specific, and 22 categories are formed on the basis of 5 basic categories. The symbol of China Library Classification adopts a mixed number of Chinese phonetic alphabet and Arabic numerals. That is, a letter represents a big category, and the order of big categories is embodied in alphabetical order. The letters are followed by numbers, indicating the division of the following categories. Numbers are numbered in decimal. The five basic departments and their 22 categories are as follows: A Marxism-Leninism, Mao Zedong Thought, Deng Xiaoping Theory B Philosophy, Religion C Introduction to Social Sciences D Politics, Law E Military F Economy G Culture, Science, Education, Sports H Language, Writing I Literature J Art K History, Geography N Natural Science O Mathematical Chemistry P Astronomy, Earth Science Q Biological Science R Medicine, Health S Agricultural Science T Industrial Technology U Transportation V Aviation.