Forum:Seasons and Arcs

Can we have a page which explains how this wiki defines Seasons and Arcs? At the moment, it all seems rather arbitrary. I know that, for a while at least, arcs were defined (at least within 5Ds and ZEXAL) by Japanese opening themes, but at this point, I don't think that's being followed. Can anyone explain the system to me? Battlemaniac (talk • contribs) 23:46, April 11, 2015 (UTC)