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==ISBN/ISSN== | ==ISBN/ISSN== | ||
The ISBN (International Standard Book Number) is a unique numeric commercial book identifier. As manga volumes are considered books, ISBN is the unique identifier for a manga book/volume and thus, could be used as the manga version of ed2k dump. One could also use those numbers in the search field for manga. The numbers look something like this: '''ISBN4-87306-174-1'''. The example is in 10-digit format (used since 1970), however, since 1st of January 2007, ISBNs have contained 13 digits. Identical numbers can be seen below one of the barcodes, continuing with the same example, the numbers below the barcode are '''9784873061740'''. Note that this has 13 digits with the addition of 978, and since 2007 that number is also included in ISBN. | |||
An ISBN consists of 4 or 5 parts: | An ISBN consists of 4 or 5 parts: | ||
#for a 13 digit ISBN, a GS1 prefix: 978 or 979 (indicating the industry; in this case, 978 denotes book publishing). This number is not present for manga volumes published before January of 2007. This makes little difference, though, since all manga have the code 978 which means it's a book. | #for a 13 digit ISBN, a GS1 prefix: 978 or 979 (indicating the industry; in this case, 978 denotes book publishing). This number is not present for manga volumes published before January of 2007. This makes little difference, though, since all manga have the code 978 which means it's a book. | ||
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#the publisher code. In given example, 87306 is Angel Comics (porn). | #the publisher code. In given example, 87306 is Angel Comics (porn). | ||
#the item number, (title of the book). In given example, 174 is Full Course by Nico Pun Nise (porn). | #the item number, (title of the book). In given example, 174 is Full Course by Nico Pun Nise (porn). | ||
# | #a checksum character or check digit. The final character of a ten digit ISBN is a check digit computed so that multiplying each digit by its position in the number (counting from the right) and taking the sum of these products modulo 11 is 0. The last digit (which is multiplied by 1) is the check digit, chosen to make the sum correct. It may need to have the value 10, which is represented as the letter X. '''Problem:''' as is the case with the example, 10-digit ISBN format check digits almost always differ from what's given under the barcode. Which values to use? | ||
ISSN (International Standard Serial Number) is a unique eight-digit number used to identify a print or electronic periodical publication such as manga magazines. The ISSN system was adopted as international standard ISO 3297 in 2007. However, I can't check if those numbers are actually given for manga magazines. | |||
==External Resources== | ==External Resources== | ||