The S7 modifier is used with the SOUNDEX2 routine to ensure compatibility with Series 7. The S7 modifier applies the same algorithm as in Series 7 to SOUNDEX2 routine. Use S7 when you want to obtain the same linking results as Series 7.
Note: All SOUNDEX related routines are limited to working with attribute sizes of 256
characters. If the attribute length exceeds 256 characters, the algorithm will be applied
to the first 256 characters for all SOUNDEX routines. The algorithm will be applied to the
last non-blank 256 characters for all RSOUNDEX routines.
Algorithm
- Capitalize all characters in the string.
- Replace all non-leading vowels with A.
- Transform the following prefixes:
From characters To characters MAC
MCC
KN
NN
K
C
PF
FF
SCH
SS
PH FF - Transform these character combinations that occur after the first position:
From characters To characters DG
GG
CAAN
TAAN
D
T (not iterative)
Q G (not iterative) NST
NSS
AV
AF
Z
S (not iterative)
M
N (not iterative)
KN
NN
K
C (not iterative)
AW A PH FF SCH SSS - Replace H with A unless it is preceded and followed by A (for example, AHA).
- Remove all A characters except for the leading A.
- Remove all but the first of repeating adjacent character substrings.
- Return the first four characters.
|
Score |
Description |
|---|---|
|
0 |
Case 1: Both strings are blank Case 2: Neither string is blank and they are not equal. |
|
50 |
One string is blank; the other string is non-blank. |
|
100 |
Strings are equal. |