Yes, the SMF records can identify who DEFINED, READ, WROTE, DELETED, or UPDATED a data set. The details are complex since SMF data is complex. Expect to pay someone their standard rate (typically around 1000 U.S. dollars or euros per day) if you want detailed assistance. Or, you can look in the SMF manauals and figure it out yourself (look at the type 15 and 42 records, although if the data set is VSAM you need to look at the 60-69 records). Also, if your site uses MXG or MICS, these products vastly simplify accessing the SMF data.