Classification-put the same things together and distinguish different things.
Literature classification refers to the classification according to the research object, content nature, form and genre, reader's purpose, etc. According to a certain method, similar documents are grouped together and different types of documents are connected, and then library resources are formed into a coherent, systematic and internally related knowledge network, which is convenient for readers to find and use.
Book classification is to organize books logically and systematically according to the subject attributes and certain classification methods of book content, and at the same time give them corresponding classification numbers, so as to arrange books according to numbers and organize classified catalogues. Therefore, books on the same subject are collected together to manage the library scientifically and let readers search books by category.
Classification refers to grouping each document into a group of documents with the same content, nature or other characteristics. In this way, the same document can be grouped together, while other documents different from it can be distinguished.