Continuity

Continuity 

Refers to the consistency within elements of a canon or fanfic's plot, characterization, settings, and other small details that add depth to the story. Failures or gaps in the continuity can be quite noticeable and may detract from the overall enjoyment of the work. Such gaps also make excellent fodder for authors looking to fill them in, such as with backstory or missing scene fics. Established continuity can also be changed deliberately (or accidentally!) by the original canon's creators in a move known as "retconning".