Dunno but I bet if you read/search this, you will have a better clue
Seriously, this looks like excellent readable documentation.
Say thank you to @Traktion 
No idea how accurate it is or consistent but it reads well so far.
and heres the same for the node
Everybody needs to read both docs to ensure its correct and consistent
and to find how this whole thing works in a very readable manner.
Well done @Traktion 