* Let's define the protocol : Here L__ -> List, no flatten, no transpose L_T -> List, no flatten, Transpose LFT -> List, Flatten, Transpose S__ -> Set, no flatten, no transpose S_T -> Set, no flatten, Transpose SFT -> Set, Flatten, Transpose --> AGG can not have flatten it is upto author AGG -> Aggregate, no flatten, no transpose AGT -> AGG, no flatten, Transpose */.

Extract out macros, failed with regex.

within UDF this does parameter extraction.