User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-4269579-20121230031418/@comment-173.172.74.28-20130102181124

I completely agree that anything that is downloadable content that you are paying money to obtain even if that amount be only $5, should be considered a dlc despite whatever they decide to make the prefix tag. If it were truely part of the dawnguard dlc, then they should have released it later for free as part of the original dlc that was released.