GUID, UUID, ... ?

UUID.asm

; it's many forms and names ...

macro UUID line&
	match A - B - C - D - E, line
		dd 0x#A
		dw 0x#B,0x#C
		dq 0x#D#E bswap 8
	else match { A =, B =, C =, D { E } },line
		dd A
		dw B,C
		db D E
	else ; assume brief
		ddq line
	end match
end macro

macro compare_last_two?
	local _0,_1
	load _0:16 from $-16
	load _1:16 from $-32
	assert _0 = _1
end macro

UUID	0xC79926B7B668C0874433B9E5EBD0A0A2
UUID	EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
compare_last_two
UUID	{0xEBD0A0A2,0xB9E5,0x4433,0x87,0xC0,{0x68,0xB6,0xB7,0x26,0x99,0xC7}}
compare_last_two