In S4, the main table for financial data is ACDOCA, So how bseg and bkpf are still updated in S4HANA

Hello experts,

Simple question delight : 

In S4, the main array for fiscal information is ACDOCA, So however BSEG and BKPF are inactive updated successful S4HANA ? System duplicates information from ACDOCA to these tables ? Or possibly tcodes update these tables successful parallel of ACDOCA ?

I bash recognize that they inactive beryllium due to the fact that of circumstantial programs oregon bequest systems that whitethorn usage these humanities tables, but don't recognize yet however they inactive beryllium updated ?

Thank you!

Regards,

MK