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Note that the ISBN hyphenation rule-base is a living document. This is a maintenance category of articles with invalid ISBNs. It is often included by means of the template {{Please check ISBN}}. If you fix an ISBN please remove the template or category from the article. Many article/ISBN problems are listed at WikiProject Check Wikipedia.
The template takes as argument a valid ISBN and yields the formatted version of that ISBN. Any existing hyphens in the ISBN are ignored, whether or not they are correctly placed: {{format ISBN|97-8-1-57181655-9}} → 978-1-57181-655-9 {{Format ISBN}} is intended to be substituted so that the template call in wikitext is replaced with the ...
checksum – ISBN has one or more incorrect digits; look for typos and transposition invalid character – ISBN has one or more 'digits' that is not in the allowed set appropriate to ISBN length invalid prefix – 13-digit ISBNs must begin with '978' or '979' invalid form – 10-digit ISBNs with the mis-positioned 'X' character
If you remove the {{ISBN missing}} template without fixing the problem in one of the above ways, someone else will come along later and flag the reference with {{ISBN missing}} again! TemplateData This is the TemplateData for this template used by TemplateWizard , VisualEditor and other tools.
Some ISBNs may still have been printed correctly elsewhere in the same book or corrected in later editions; if further research shows that to be the case (and that the new ISBN still refers to an edition with the same information on the same pages), then the invalid# parameter should be moved or {{Listed Invalid ISBN}} should be replaced with {}.
Either hide them in a comment, or make the template produce "The ISBN x-xxx-xxxx-xx given for this publication is invalid; if you know the correct one, please consider fixing it.", with 'consider fixing it' linked to this (or another) page explaining the use of the ISBN template.
The ISBN-13 is often found near the barcode and will start with either 978- or 979-. However, if an older work only lists an ISBN-10, use that in citations instead of calculating an ISBN-13 for it. This is because ISBNs are often used as search strings and checksum differences between the two forms make it difficult to find items listed only ...
For example | isbn = {{Listed Invalid ISBN|123-456-7890-123}} is incorrect use. Usage This template should only be used in limited cases when an editor knows that the International Standard Book Number (ISBN) printed in a source publication is invalid.