通用唯一识别码/metadata1

通用					有连字符的十六进制			高低位			整型数组
Use	Bit range		Range size	Value	Section	Bit range		Section	Bit range		Section	Bit range
	From	To				From	To		From	To		From	To
UUID format	62	63	2	2	clock-seq-and-reserved	6	7	Least	62	63	Index 1	30	31
UUID version	76	79	4	4	time-high-and-version	12	15	Most	12	15	Index 2	12	15