Category:CS1 errors: ISSN

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This is a tracking category for CS1 citations that have ISSN errors.

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Check |issn= value

Citation Style 1 templates that contain |issn= are checked to ensure that the ISSN is the proper length (eight digits) and that the final check digit validates according to the ISSN specification. Only one ISSN is allowed in this field because the whole |issn= value is included in the citation's COinS metadata. See also Wikipedia:COinS. The ISSN is always rendered as two four-digit numbers separated with a hyphen.

To resolve this error, ensure that the |issn= value is correct, that only one ISSN is used, and that no other text is included (allowable characters are 0-9, X, and -). If the check-digit is a lowercase 'x', change it to an uppercase 'X'.

Pages with this error are automatically placed in Category:CS1 errors: ISSN.[a]


  1. ^ Pages in the Book talk, Category talk, Draft, Draft talk, Education Program talk, File talk, Help talk, MediaWiki talk, Module talk, Portal talk, Talk, Template talk, TimedText talk, User, User talk, and Wikipedia talk namespaces are not included in the error tracking categories.
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