R4301Z1P Logic

Hi As i understand this Report is Obsolete in 9.1 version but i indeed had to Purge data from F4301Z1, F4311Z1..... I can certainly use Application to do so but there are lot of records. Can i know what logic was used / what bsfn was used to purge the data so that i can plan to use the same in a custom UBE to achieve the same. One such BSFN what i found which was used in P4311Z1 is N4311Z1P but that looks to be purging only F4311Z1 alone.