{{ISBN|0-7475-3269-9}}

results in:

ISBN 0-7475-3269-9

The idea is to switch from "magic link" syntax to more explicit syntax. This March 2017 (English Wikipedia) RfC determined the magic link should be replaced by this template.

This template uses Module:Check isxn to validate the ISBN. If the ISBN is not valid, this subtemplate will still generate the link, and it will add the article to Category:Pages with ISBN errors.