Man, I wish Troflip or Lars were around to handle this one.
I looked at the scistudio help file and, looking at features, the simplest of the two,
It claims the properties, are x, y, z, and heading. So I'm assuming this is basicly just used for props, actors and other views.
For the most part those are pretty self explanatory, but anyway,
x the x position
y the y position
z the z, position, basicly an offset y,
and heading, probably a angle, but the direction an view is heading.
Ok, so I know this is probly not what you wanted to know, but there it is. That's as much help as I can give for now.
As for the Parser, Troflips Advanced tutorial goes into slightly more detail in the advanced said string tutorieal, but he doesn't give any kind of description like verb/noun/noun but essentially that will get you there.
typing look tree, look at tree, look at the tree are all recognised as the same input, so basicly noun/verb. As I gave up a long time ago with the parser some of the guys that have fought with it more recently might be able to shed a little more light than that. I have gone totally point and click myself.