Bookland: Difference between revisions

→‎History: quote marks around letter since we're talking about it rather than using it.
(Undid revision 879229423 by 151.255.14.70 (talk) not constructive)
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(→‎History: quote marks around letter since we're talking about it rather than using it.)
 
== History ==
Until January 1, 2007, all ISBNs were allocated as 9-digit numbers followed by a [[modular arithmetic|modulo]] 11 [[checksum]] character that was either a decimal digit or the letter "X". A Bookland EAN was generated by concatenating the Bookland UCC 978, the 9 digits of the book's ISBN other than its checksum, and the EAN checksum digit.<ref>[https://www.isbn-information.com/the-13-digit-isbn.html Anatomy of a 13-digit ISBN]</ref><ref>{{citation |url=https://books.google.com/books?id=d5Z5I3gnFh0C&pg=PA265 |title=Elementary number theory with applications |author=Thomas Koshy}}</ref>
 
Since parts of the 10-character ISBN space are nearly full, all books published from 2007 on have been allocated a 13-digit [[ISBN]], which is identical to the Bookland EAN. Most of UCC 979 (formerly "Musicland") has now been assigned for the expansion of Bookland,<ref>{{citation |url=https://books.google.com/books?id=KjveruEBBfoC&pg=PT41 |title=Book Marketing Demystified |author=Bruce Trelawny Batchelor}}</ref> and was first used by publishers in the French language, which can now use the additional prefix "979-10-" in addition to the nearly full "978-2-" prefix (onto which legacy 10-character ISBNs starting with "2-" have been remapped). Books numbered with prefixes other than 978 will not be mappable to 10-character ISBNs.