TA_OPEN is obsolete in 3.x and above.
Hex
Bit
0x00
TA_NONE
0x01
TA_READ
0x02
TA_WRITE
0x04
TA_OPEN
0x08
TA_CREATE
0x10
TA_DELETE
0x20
TA_OWNERSHIP
0x40
TA_SEARCH
0x80
TA_MODIFY
0xFB
TA_ALL