What is the principle of file numbering?

File number (fonds number, catalog number, file number (package number) and page number).

1. Family number compilation: fill in the code number compiled by the archives for the filing unit. For example, Shaodong No.1 Middle School, the county archives confirmed its clan number as "142" and marked it as "0 142". If the case number is not determined, the file may not be filled in before entering the library. Enterprises can fill in the Chinese phonetic alphabet of the expression unit.

2. Compilation of catalog number. Fill in the number of the directory where the files in the whole clan belong. Duplicate file directory numbers are not allowed in the same clan. An enterprise or unit that makes a classification scheme according to the Trial Rules for Archives Classification of Industrial Enterprises may fill in the category characteristic code. The file directory number should be set according to the file arrangement of the whole clan. The file directory number can be set according to different time, different organizational structure, different storage period, different themes or different carrier forms. The number of files contained in each file directory is generally three digits.