actually "built-in parameters" is a more accurate term for what i'm looking for than internal parameters.. i guess there's a couple thousand of them- and i just wanted to see a list of them.. i'm just beginning to poke around in the revit database.. sort of like "lift the hood and look at the motor" kind of thing.. seems like it would be lots of fun in there.. but if anyone can point me to that list- i would be most thankful..