Difference between PIN encryption key variant and data encryption key variant

Question

In the process of decryption a data, I am getting this two definitions confused. I would really appreciate a better understanding to these two different description.

Already searched google, to see if i can get more understanding, but still confused with the ones i got.

Thanks so much for your time.

Answer 1

WRT DUKPT key varients:

Here is a table that shows the DUKPT variants. You really should get ANSI X9.24, Part 1 document and read the DUKPT section.