The HOUSENO routine compares two (2) house numbers, assuming fields are right-justified. If the two (2) fields do not match exactly, the routine calculates two (2) field lengths and starting positions by excluding leading blanks.
|
Score |
Description |
|---|---|
|
100 |
Exact match (excluding blank versus blank and all zeros versus all zeros). |
| 99 |
Blank field value versus non-blank – OR – All zeros field value versus all non-zeros field value. |
| 98 |
Blank field value versus blank field value – OR – All zeros field versus all zeros. |
|
If fields do not match according to the preceding criteria, these actions are performed: |
|
| 98 |
Check if either number is in the form N-N. If both numbers are of the form N-N, then no exact match exists; however, If one of the numbers is N-N, then check if the other number is in the range N-N. If it is, then return a score of 98. (For example, 103 is in the range of 101-105.) Note: The parity of the single numeric field must match the parity of the first
value of numeric range field. For example, the values '15' and '12-19' do
not match in parity. In this case the routine reduces the data to '1219' and
compares it to '15,' which results in the returned score of 60.
|
|
100 |
Remove all leading blanks and characters that are not digits or letters from both strings and left-justify them. Return 100 if there is an exact match. |
|
Deduct from 100 |
Reason for deduction |
|
– 5 |
For character errors (transposition, insertion, mismatch, extra characters at the end of either field after considering insertions). |
|
– 10 |
If the number of character errors is more than 25% of the length of longer field. |
|
– 25 |
If the number of character errors is more than 50% of the length of longer field. |