Hi,
There are no definition in the QKB to match and cluster records by age.
Also, I thought about your use case and I think it's not a good solution. Let me explain what could happen:
-> customer A is 20 and matches customer B who is 25,
-> but customer C is 30, and therefore matches customer B,
-> and, customer D is 35 and therefore matches customer C.
In the end, A matches D, and you'll end up one big cluster with all of your records.
So I think age should not be used this way. Maybe there are other criteria in your data that would be better.
Hope this helps.
Audrey