0x00000000:no:invalid class
0x00000001:fr:file read
0x00000002:fw:file write
0x00000004:fa:file attribute access
0x00000008:fm:file attribute modify
0x00000010:fc:file create
0x00000020:fd:file delete
0x00000040:cl:file close
0x00000080:pc:process
0x00000100:nt:network
0x00000200:ip:ipc
0x00000400:na:non attributable
0x00000800:ad:administrative
0x00001000:lo:login_logout
0x00002000:aa:authentication and authorization
0x00004000:ap:application
0x10000000:res:reserved for internal use
0x20000000:io:ioctl
0x40000000:ex:exec
0x80000000:ot:miscellaneous
0xffffffff:all:all flags set
