According to the contents, forms, genres and readers' usage of books, under the guidance of certain philosophical thoughts, using the principle of knowledge classification and adopting logical methods, books of various disciplines are divided into several categories according to their subject contents, each category is divided into many subcategories, and each subcategory is subdivided into molecular subcategories. Every kind of book can be divided into certain categories, and each category has a category number. ?
The China Library Classification adopts the mixed numbering of Chinese phonetic alphabet and Arabic numerals, with one letter representing a major category, reflecting the alphabetical order of major categories, and the disciplines subdivided under major categories are composed of Arabic numerals. In order to adapt to the development of industrial technology and the classification of this kind of literature, the two-letter classification of industrial technology is adopted.
Extended data:
Book classification requirements:
1, the classification is divided into 7 levels, and it is basically divided into 5 levels, which is treated as common sense. All central colleges, comprehensive branches, professional libraries and subject reference rooms can use the classification hierarchy method to divide books.
2. The contents of disciplines are cross-cutting, and concepts have their essential attributes and non-essential attributes, which should only be classified into one category and divided according to the concept words that reveal the essential attributes. Interdisciplinary discipline is special because it follows the discipline orientation law and is also restricted by discipline standards.
3. To solve the confusion in the book classification system, we must adjust and straighten out the concepts and categories of disciplines at all levels, classify derived disciplines into traditional disciplines, and list new disciplines appropriately. Cancel the classification of "culture, science, industry and technology", re-establish the basic and subsidiary disciplines of books, and decompose them into corresponding disciplines.
Baidu Encyclopedia-China Library Book Classification