“ No link is created, so if it is needed the value for this parameter must be a link. | extra_notes = This is useful for notifying the reader of significant changes since the article was published, or other useful information about the article not appropriate to the previous parameters. | override_notes = This is useful when this template is used as a header for pages in this project which are not articles from the Encyclopædia. Its use should be restricted to such contexts. If set to nothing, the usual default notes will not be displayed. ”