Sitecore Broken Links warning dialog
Even in the era of Content Management (emphasis on the “management”) broken links or references continue to plague content authors. Sitecore is kind enough to provide a “links database” which is a specialized search index that handles all sorts of management tasks, but also will have a record of incoming references to a content item. If that item is about to be deleted, the user is prompted and given a number of options of how to alter or ignore all the incoming links to that item before being allowed to delete it.