User blog comment:Mfaizsyahmi/References on articles right and get views!/@comment-2078726-20120818062707/@comment-4356266-20120818064634

My definition of in-universe is like how Traudl-chan sees the world, inside Downfall. We the untergangers are merely observers and overseers, and anything by us are thus off-universe.

Another example is like saying "Mario is a plumber who fight his way towards the castle to save the princess" versus "Mario is a character from a side-scrolling game named Super Mario Bros. whose mission is to save the princess". The former would be in-universe and the latter off-universe.

In the end, both referencing methods are fine. The ultimate goal of this is to make the wiki more legit, with contents that are backed up by actual parodies.