User:NicoV/ISBN Warning/doc

Usage
This template is to be used for articles having invalid ISBN numbers.

It informs contributors and reader of those articles of the presence of invalid ISBN numbers, and invite them to fix them.

It must be placer:
 * either on the talk subpage /todo when it already exists (or when an link to this subpage exists in the talk page),
 * either on the talk page of the given article (preferably inside the todo template).

Note: This template is usually applied by bots or semi-automated tools, like WPCleaner.

Talk pages are automatically categorized in the category Articles with invalid ISBNs.

Syntax

 * : first invalid ISBN number (optional)
 * : details on the reason why the first ISBN number is invalid (optional)
 * : second invalid ISBN number (optional)
 * : details on the reason why the second ISBN number is invalid (optional)
 * etc. up to 20 currently.

Exemple
gives