Actually, one of our community members started doing some work with templates and created a really nice list on his own user page here:
Sunjammer's Osiris API listingThe other thing you can do is look at the story_header.div file (it's just a text file) in your <Mod>\Story\RawFiles directory, but the advantage of using the wiki table above is that it shows what has also been documented by Larian and you'll often find some important usage notes there.