China Library Classification adopts mixed numbering of letters and numbers, and basically adopts hierarchical numbering method. China Library Classification is mainly used to classify books in large libraries.
In order to meet the needs of different library and information institutions and different types of literature classification, it also has several supporting versions: China Book Classification, China Library Book Classification (Simplified Edition) and China Library Book Classification Periodical Classification Table.
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.
Extended data:
By 1999, China Library Classification has been revised four times (focusing on F economy, TN radio electronics, telecommunications technology, TP automation technology and computer technology).
20 10 September, the fifth edition was published by National Library Press. This revision is large in scale, with 163 1 category added, about 2,500 categories deactivated or directly deleted, and more than 5,200 categories modified. 20 12, 12, the national library published the fifth edition of China Library Classification User Manual.
This manual maintains the continuity and basic consistency with the description of the general classification and all kinds of literature classification in the user manual of China Library Classification (4th edition), focuses on the major changes in the 5th edition of China Library Classification and its category system, and analyzes the oversimplified or redundant and erroneous contents in the 4th edition of the User Manual.