iOS：下载xml / json来改变游戏的运行方式？

I'm wondering if this violates Apples terms or not. Basically what I'm considering is essentially a way to mod a game. The app would be able to download a set of xml/json files from my server that would change things like say how many hitpoints a monster has or something like that. From what I can tell this is completely fine, however the part I'm not sure on is something like monster actions.I'm wondering if this violates Apples terms or