There is a common ISBN (International Standard Book Number) standard in the world. China joined ISBN from 1982. Up to now, every book published by domestic formal channels has a unique ISBN number. For example, 7-121-02344-X. At present, the ISBN number of China is 10, which will rise to 13 in 2007.
In addition to ISBN, China's standard book number also has a "book classification-species number". "Book classification-category number" consists of two parts: the category number of the subject to which the book belongs and the category number under the category number, separated by a dot. Such as TP 340. Therefore, the book number of a domestic book is generally 7-144-00316-x/TP 340.
Classified call number
It mainly includes four types: classification/author word call number, classification/title call number, classification/time order call number and classification/book cataloging order call number. Their structures are basically the same, and they are composed of two basic parts. One is the classification number, which is listed in the previous line; 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. But for most books, in order to make the call number specific, 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) Add the book number or department number to the next line of the four numbers, such as the author number, to distinguish different volumes of multi-volume books and different volumes of the same book. 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.