NYSIIS Routine - trillium_discovery - trillium_quality - 17.1

IMPROVED NYSIIS ALGORITHM

1. If there are any numerics in the string, return a blank code.
2. Blank out all non-alphabetic characters.
3. If string is all blanks, return a blank code.
4. Capitalize all letters in the string.
5. Translate the following first character(s) of the string:

   From characters	To characters
   MAC	MCC
   KN	NN
   K	C
   PH and PF	FF
   WR and RH	RR
   DG	GG

6. Translate the following last character(s) of the string:

   From characters	To characters
   S or Z	Blank
   EE or IE or YE	Y
   DT or RT or RD	D
   NP or ND	N
   IX	IC
   EX	EC
   JR or SR	Blank

7. Set the first character of code with the first character of the string.
8. Translate the following character(s) that occur after the first character of the string:

   From characters	To characters
   EV	AF
   E, I, O, U	A
   Y	A (when A is not the last character)
   Q	G
   Z	S
   M or KN	N
   K	C
   PH	FF
   H	Replace with preceding character, when preceded or followed by vowel.
   W	Replace with preceding character when preceded by a vowel.
   SCH	SSA, when SCH is at the end of the string - OR - SSS, when SCH is NOT at the end of the string.
   SH	SA when SH is at end of string.
   GHT	TTT
   DG	GG
   WR	RR

9. Add a letter to a code if not the same as the preceding letter of code; do this until a 10-character code is created or until the string has no more characters.
10. Change the last letter(s) of the code:

    From characters	To characters
    S	Blank
    AY	Y
    A	Blank

    Table 1. Scoring for NYSIIS

    Score	Description
    100	Strings are equal (excludes blank versus blank).
    80	Blank code versus blank code.
    75	Blank code versus non-blank code.
    0	Code is not equal.