[okl4-developer] What does the "STRING_major" mean?

[Guanghui, Cheng]

Hello:

	In the pistachio/include/traceids.h/traceids.h file, there is a enum :
enum trace_major_ids {
    EVENT_major                         = 0,
    STRING_major                        = 1,
    INTERRUPT_major                     = 2,

    SYSCALL_IPC_major                   = 3,
    ... ...
}

	I want to know what the STRING means? STRING_IPC or whatever. 
	Thanks a lot.
											Cheng