Template:R from subsidiary title/doc

Purpose
This template is used to label a redirect as being for a subsidiary title in the peerage system - an hereditary title held by a royal or a noble but which is not regularly used to identify that person.

This template marks a redirect as one that ought not be used, and provides the correct hereditary title. Any link to a redirect page transcluding this template ought to be changed to the correct hereditary title.

This template inserts the redirect into this category:
 * Category:Redirects from subsidiary titles according to protocol, these redirects should never be used; only the correct hereditary title should ever be used

With a correct hereditary title specified for all uses of this template repairing links to the redirect page becomes simple: the link to the redirect page should be changed to the link to the correct hereditary title. Given the correct hereditary title is specified for each case below, it should always be easy to fix links these redirects.

Usage
There is one parameter, unnamed. It specifies the optional correct hereditary title.

Redirect target is the correct hereditary title
When the correct hereditary title is the target of the redirect just use ; the correct hereditary title is already available as an article.

Example:
 * Baron De La Warr → Earl De La Warr


 * 1) REDIRECTBaron De La Warr
 * It is acceptable but unnecessary to specify the redirect target as the correct hereditary title:


 * 1) REDIRECTBaron De La Warr

Redirect target only mentions subject
When linking to article where the subject is only mentioned in the target article, the correct use is, and correct hereditary title is expected to be a redirect page also redirecting to TargetPage. That is, if this redirect is an incorrect hereditary title but the target article isn't the correct hereditary title, there should be a matching redirect for the correct hereditary title.

Redirect targets a #section or #anchor
When linking to a section or anchor within an article such as #REDIRECTTargetPage, the correct use is , and correct hereditary title is expected to be a redirect page also redirecting to TargetPage. That is, if this redirect is an incorrect hereditary title, there should be a matching redirect for the correct hereditary title.