The call number is generally composed of several groups of numbers arranged in rows, and is often printed in the upper left corner of the catalog card, on the book label below the spine and above the title page of the book or back cover. A call number can only represent one kind of book. Because the shelving methods of library books can basically be divided into two categories: classified shelving and formal shelving.

I and u represent a call number in classification/author, classification/book name, classification/time order and classification/book cataloging order. It depends on which category the library ranks. Generally speaking, the library has a borrowing bibliography.

The structure of the call sign is basically the same, which consists of two basic parts: one is the classification number, which is listed in the uplink; The other part is the book number, that is, the author number, book name, publication year number and cataloging sequence number of such books, which are listed in the next line of the classification number. For a few books, the call number only consists of the above two basic parts.

Extended data:

For most books, in order to concretize the call number, the following symbols must be attached according to the specific situation:

(1) Append the title of the book, only after the author number, to distinguish different works of the same author in the same category.

(2) Version number, which is added to the next line of the author number or title to distinguish different versions of the same work.

(3) Volume number or department number, supplemented by author number, etc.

In addition, if necessary, the language number (used to distinguish foreign documents), document type identifier (such as reference book identifier) or special collection number should be appended after the classification number. The order of call numbers adopted by most libraries in China is classification/author and classification/book cataloging.

Baidu encyclopedia-call number