Sounds cool, i'd be interested what you'll come up with. Just don't underestimate how complex your data structure has to be. In many systems single points in traits can represent a whole lot of information. In Shadowrun the is a trait called connections, where every point represents a NPC which should at least be given a name an a few sentences of background. In the WoD-Games you have traits like language, where you have to decide what actual languages you buy when buying new points for that skill. These kinds of additional information are especially helpful for the storyteller/gamemaster when planing a story.

Also it seems to me like a good idea to make information like character classes hierarchic. A good example would be prestige classes you get on top of you character class in D&D 3 but also things like Breed=>Auspice=>Tribe in Werewolf could be represented that way.

If it would be helpful to you, i could try to describe my Demon: The Fallen character in a perl data structure.