User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-174.59.73.113-20130103230642

They can argue all they want about legal terms,but the fact is when a game is put out as a product that is the product after the release you get patches or updates as some call them or you get DLC so if they are saying anything i guess heartfire was a patch and not DLC which we know that it wasn't,but if they want to sleep better at night,they can call it a patch.