Best Developer doc pages for object properties by category

I you were going to experiment with SuperTool, are there developer pages that you would reference which describe the list of properties for each category of object?

The Help dialog currently included with SuperTool is more of a Vocabulary. Additional information would be good to link within its helptext.txt reference file.

(For instance, the handle could hotlink to one of the many discussion of how Gramps handles are generated or can be reverse-engineered.)

And possibly there are examples of a get, set, and (if necessary) sending an notification that data was updated? Or maybe methods should be mentioned?