NYSIIS Routine

The NYSIIS routine matches two (2) strings of data, using an algorithm based on a standard NYSIIS algorithm. The maximum field comparison length is 256 characters.

► 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

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.