How are books arranged?

Books in the library are arranged by call number, that is, by classification number first, then by book number. From left to right, from top to bottom, from front to back, in turn. According to the classification number, it should be contraposition arrangement, that is, first compare the first-class number, then compare the second-class number when the first-class number is the same, and so on. The arrangement of classification numbers and numbers should strictly follow the decimal system. The longer the classification number, the narrower the subject scope and the more specialized it is. For the shelving of different books, first compare an equal sign, then compare two equal signs when an equal sign is the same, and so on. Similar books refer to books with the same classification number, which are arranged according to the category number from small to large (marked with diagonal line "/"); If the species numbers are the same, they are arranged from small to large according to the auxiliary distinguishing numbers. When there are imitations and divisions in various disciplines, they have been integrated into the classification, and no additional symbols are added. Shelving is basically the same as general books and periodicals. Generally speaking, all kinds of general subdivision of classification and grading need to be marked with specific symbols. Priorities are: dots, bars, etc. (homophonic: point, column, width, etc. Meaning: check it soon, etc. ). Point refers to a point. In order to make the numbers clear, a dot "?" Usually separated by three digits of the classification number. ; Lever refers to the complex semicolon "-"; The asterisk refers to the compound semicolon ":"; Enclosed (number) refers to the national identification number "()"; The equal sign refers to the time distinguishing symbol "=".