Input (grade 12): In namespaces where subpages are supported, you can for instance create a subpage simply by linking to the name of the subpage, prefixed with a slash (e.g. \/O/ Archive).
Output (grade 12): In namespaces where subpages are supported, you can create a subpage simply by linking to the name of the subpage, prefixed with a slash (e.g. \/O/ Archive).