Help:Deprecating Articles
This is pretty easy -- just add Template:Deprecated like this: {{Deprecated|REASON}}. It's probably helpful to add a link to more updated documentation (which you've surely already written right?!) to the REASON.
This is pretty easy -- just add Template:Deprecated like this: {{Deprecated|REASON}}. It's probably helpful to add a link to more updated documentation (which you've surely already written right?!) to the REASON.