Category:Pages with ISBN errors

This is a tracking category. It is used to build and maintain lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the BTW's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference is set. These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list (discriminated by classifications).

Administrators: Please do not delete this category as empty! This category may be empty occasionally or even most of the time.

This category is populated by pages and templates that use {{ISBN}} and {{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:

See also[edit]

• Category:Pages with listed invalid ISBNs