Step 1, B-LACKGUARD

Then we encode the letters

L:4

C:2

K:2

G:2

R:6

D:3

Step 2: B-4a222ua63

Step 3, collapsing adjacent identical digits, returns : B-4a2ua63

Step 4 removes all non-encoded letters, B-4263

Step 5 truncates to 3-digits, leaving us B-426

The SNDX value for BLACKGUARD is B-426 (BLKR)

Keeping the A, we encode the remaining characters

T:3

R:6

L: 4

After step 2 our string is A336ie4

Step 3 removes “adjacent digits”, leaving us with A36ie4

Step 4 removes non-encoded letters, giving us A364

Step 5 truncates to 3 digits, which is all we have.

The SNDX value for ATTRIEL is A-364

We retain the D

Then we encode D B and F.

D: 3

B: 1

F: 1

So our partial value (after step 2) is : Dea31ee1

Step 3 makes no change (Note that the two 1′s are not currently by each other)

Step 4 removes the “non encoded letters” (vowels), giving us: D311

Step 5 limits us to three digits, which is all we had anyway.

So the SNDX for DEADBEEF is D311

The idea behind Soundex (or SNDX, although not usually referenced in that manner) is to provide a representation of a name that will match for any minor variations that do not greatly alter the pronounciation. Pronunciation. Whichever.

The idea being that Robert and Rupert will be represented the same (R163) but Rubin will differ (R150). Because it was intended for names, it’s function is limited outside that scope. The original soundex structure calls for first letter followed by 3 digits, making the algorithm questionable for large words.

1. Keep first letter of word or name, this is the first value in the Soundex value
2. For remaining letters, convert all consonants with the table after the jump.
3. All adjacent duplicate digits are collapsed into a single instance of each
4. All remaining characters (vowels) are dropped
5. The first three numbers are the remainder of the Soundex Value

• B F P V => 1
• C G J K Q S X Z => 2
• D T => 3
• L => 4
• M N => 5
• R => 6