Category:Pages with ISBN errors
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This category is populated by pages and templates that use {{tl|ISBN}} and {{tl|ISBNT}}.
In these templates, ISBN parameters are checked for invalid ISBNs as well as extraneous text such as "ISBN", "N/A", "none", dashes (use hyphens instead), lower-case "x" (use "X" instead), and tab characters.
Error messages for erroneous ISBNs look like one of:
{{plainlist|1=
- Check
|isbn=value - Invalid ISBN
- Parameter error in {
{isbn} }: Invalid ISBN
}}
=See also=
- {{cl|Articles with invalid ISBNs}}
- {{cl|CS1 errors: ISBN}}
- {{cl|Pages with listed invalid ISBNs}}