Value,Semantics,Reference
-18446744073709551616..-19,Unassigned,
-18,attoseconds,[RFC9581]
-17..-16,Unassigned,
-15,femtoseconds,[RFC9581]
-14,Unassigned,
-13,timescale (elective),[RFC9581]
-12,picoseconds,[RFC9581]
-11,IXDTF Suffix Information (elective),[RFC9581][RFC9557]
-10,IXDTF Time Zone Hint (elective),[RFC9581][RFC9557]
-9,nanoseconds,[RFC9581]
-8,Guarantee,[RFC9581]
-7,Uncertainty,[RFC9581]
-6,microseconds,[RFC9581]
-5,Offset-Scaled Log Variance,[RFC9581]
-4,Clock Accuracy,[RFC9581]
-3,milliseconds,[RFC9581]
-2,Clock Class,[RFC9581]
-1,timescale (elective) legacy,[RFC9581]
0,Unassigned,
1,base time value as in CBOR Tag 1,[RFC8949][RFC9581]
2-3,Unassigned,
4,base time value as in CBOR Tag 4,[RFC8949][RFC9581]
5,base time value as in CBOR Tag 5,[RFC8949][RFC9581]
6-9,Unassigned,
10,IXDTF Time Zone Hint (critical),[RFC9581][RFC9557]
11,IXDTF Suffix Information (critical),[RFC9581][RFC9557]
12,Unassigned,
13,timescale (critical),[RFC9581]
14-18446744073709551615,Unassigned,