transformation rule

19 LETTERS · STARTS WITH T

transformation rule is a valid 19-letter word worth 23 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1R1A1N1S1F4O1R1M3A1T1I1O1N1R1U1L1E1

1 + 1 + 1 + 1 + 1 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does transformation rule mean?