library

Classification (CLC) is a sign that all articles are classified by document identification codes according to the provisions of China Library Classification. At present, China Library Classification is the fourth edition. The classification number of Chinese Library Classification creates conditions for realizing family retrieval from the subject attributes of periodical documents and classifying articles, which not only facilitates the authors, readers and editors to consult and retrieve the documents related to the articles to be published, but also lays a foundation for the authors and scientific and technological information units to classify articles. Therefore, the number of China Library Classification should be used for every periodical document.

Literature classification should pay attention to accuracy, consistency, practicability and compatibility. It must take the subject or professional attribute of the literature content as the main classification standard, and classify the literature into the corresponding category appropriately, rather than the category with too large or too small scope, and at the same time, it should reflect the systematicness and logic of classification. When classifying periodical literature, we should first analyze the titles and understand the central content and writing purpose of the literature; When the title fails to reflect the central content of the document, read the abstract or abstract of the document to grasp the central content of the document; If the above information still can't meet the requirements of theme analysis, you need to browse the text, understand the content and main points of the literature discussion, and analyze its theme attributes; If the literature cannot be classified, it is necessary to consult the reference books and finally determine its subject attributes.