Thread:Batcraft10/@comment-246292-20131203005520/@comment-246292-20131203010956

Out-of-universe basically means mentioning anything that isn't part of the DC Universe. So things like, "In issue 23 of Batman", is out-of-universe. Also anything like creators, dates books come out, or issue names is out-of-universe. You want to write like you are living in the DC Universe.