Match keys are generated using a Match Key Code (MKC). This describes the address component field data that should be used to generate the match key.
The data definition for each field contains four components:
The field number, which is specified using the numeric equivalent of the field value in the Optima Field Type (OFT) enumeration
The reading direction, which is either 'L' for left, or 'R' for right
The character count
The character type, which is either:
A for alpha
N for numeric
C for consonants
V for vowels
B for alphanumeric
E for everything
For example:
[22,L,20,B][19,L,5,A][14,L,5,N][15,L,5,A]
means match keys will be generated using:
the leftmost 20 alphanumeric characters from the postcode
the leftmost 5 alpha characters from the city
the leftmost 5 numeric characters from the premise
the leftmost 5 alpha characters from the street