Correct byte designation in .xml

If the received bytes in the obd are larger than the standard 8mi, how can this be formulated in obd II.xml?
A, B, C, D = B0, B1, B2, B3 …
L, M, N, O = ???
Direct to the true path))))

Byte numbers just go on forever, B9 B15, B77 B443 and so on.