Template:Shelf:Check parent page/doc

This template checks the status of an expected parent of a shelf, which may be a department or another shelf.

Usage
Place this template on a page that expects the parent to exist. This template expects one parameter, as of this writing:
 * &mdash; required &mdash; the name of the parent, without the  or   prefix.

Internals
If any error is detected, this template generates a text message and adds the current page to /Attention needed.

If the parent exists as a department but is not centrally listed, that's a problem that may require an admin and may be quite complicated, so this template does not provide any remedial button. A department page is also tested via Department:Page? for proper set-up, and a button may be provided to repair it via ordinary editing of the wikipage. Otherwise, this template provides a button to create the parent as a shelf via ordinary editing of a wikipage. A contemplated upgrade would detect availability of dialog and replace the editing button(s) with buttons for dialog-based assistance.

It may be appropriate for this template to either mimic, or incorporate logic from, Shelf:Get parent prefix.