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To confirm the check digit, calculate the sum of all eight digits of the ISSN multiplied by their position in the number, counting from the right. (If the check digit is X, add 10 to the sum.) The remainder of the sum modulo 11 must be 0. There is an online ISSN checker that can validate an ISSN, based on the above algorithm. [7]
The ISSN or International Standard Serial Number identifies a serial publication, such as a newspaper, magazine, or academic journal, or blog; it is the periodical counterpart of the ISBN for a book. It does not identify a particular issue or a particular article in an issue.
1 x ISSN = 0046-5755 : Desargues graph 2 x ISSN = 1798-4769 : Balinese language, Indonesian language 1 x ISSN = 2732-6535 : Agha Pasha Mosque 1 x ISSN =0219-6352 : Journal of Integrative Neuroscience
Each of the first nine digits of the 10-digit ISBN—excluding the check digit itself—is multiplied by its (integer) weight, descending from 10 to 2, and the sum of these nine products found. The value of the check digit is simply the one number between 0 and 10 which, when added to this sum, means the total is a multiple of 11.
The ISSN refers to the particular publication, not to a specific issue (or date) of that publication. The ISSN is used to help establish the publication as a Wikipedia reliable source. For a publication with the ISSN 1234-5678, use {{ISSN|1234-5678}}. The template supports up to 9 ISSNs.
The Publisher Item Identifier (PII) is a unique identifier used by a number of scientific journal publishers to identify documents. [1] It uses the pre-existing ISSN or ISBN of the publication in question, and adds a character for source publication type, an item number, and a check digit.
Use hyphens if they are included, as they divide the number into meaningful parts. The placement of hyphens varies depending on the value of the ISBN. Here is an example of a book listing. Look on that page under "product details." There one can find these two ISBNs for that book: ISBN-10: 1413304540 ISBN-13: 978-1413304541
ISBN-13 is checked in check_isbn(). If the number is valid the result will be 0. Before calling this function, ... local function check_issn (id, error_string) ...