Concise Binary Object Representation (CBOR) Tags

Last Updated
Available Formats



Plain text

Registry included below


Carsten Bormann
All registration requests must include the template from [RFC7049].
Available Formats

Range Registration Procedures
0-23 Standards Action
24-255 Specification Required
256-18446744073709551615 First Come First Served
Tag Data Item Semantics Reference
0 UTF-8 string Standard date/time string; see Section 2.4.1 [RFC7049]
1 multiple Epoch-based date/time; see Section 2.4.1 [RFC7049]
2 byte string Positive bignum; see Section 2.4.2 [RFC7049]
3 byte string Negative bignum; see Section 2.4.2 [RFC7049]
4 array Decimal fraction; see Section 2.4.3 [RFC7049]
5 array Bigfloat; see Section 2.4.3 [RFC7049]
6-15 Unassigned
16 COSE_Encrypt0 COSE Single Recipient Encrypted Data Object [RFC8152]
17 COSE_Mac0 COSE Mac w/o Recipients Object [RFC8152]
18 COSE_Sign1 COSE Single Signer Data Object [RFC8152]
19-20 Unassigned
21 multiple Expected conversion to base64url encoding; see Section [RFC7049]
22 multiple Expected conversion to base64 encoding; see Section [RFC7049]
23 multiple Expected conversion to base16 encoding; see Section [RFC7049]
24 byte string Encoded CBOR data item; see Section [RFC7049]
25 unsigned integer reference the nth previously seen string [][Marc_A._Lehmann]
26 array Serialised Perl object with classname and constructor arguments [][Marc_A._Lehmann]
27 array Serialised language-independent object with type name and constructor arguments [][Marc_A._Lehmann]
28 multiple mark value as (potentially) shared [][Marc_A._Lehmann]
29 unsigned integer reference nth marked value [][Marc_A._Lehmann]
30 array Rational number [][Peter_Occil]
31 Unassigned
32 UTF-8 string URI; see Section [RFC7049]
33 UTF-8 string base64url; see Section [RFC7049]
34 UTF-8 string base64; see Section [RFC7049]
35 UTF-8 string Regular expression; see Section [RFC7049]
36 UTF-8 string MIME message; see Section [RFC7049]
37 byte string Binary UUID ([RFC4122] section 4.1.2) [][Lucas_Clemente]
38 array Language-tagged string [][Peter_Occil]
39 multiple Identifier [][Lucas_Clemente]
40-60 Unassigned
61 CBOR Web Token (CWT) CBOR Web Token (CWT) [draft-ietf-ace-cbor-web-token]
62-95 Unassigned
96 COSE_Encrypt COSE Encrypted Data Object [RFC8152]
97 COSE_Mac COSE MACed Data Object [RFC8152]
98 COSE_Sign COSE Signed Data Object [RFC8152]
99-255 Unassigned
256 multiple mark value as having string references [][Marc_A._Lehmann]
257 byte string Binary MIME message [][Peter_Occil]
258 array Mathematical finite set [][Alfredo_Di_Napoli]
259-263 Unassigned
264 array Decimal fraction with arbitrary exponent [][Peter_Occil]
265 array Bigfloat with arbitrary exponent [][Peter_Occil]
266-1000 Unassigned
1001 map extended time [draft-bormann-cbor-time-tag-01]
1002 map duration [draft-bormann-cbor-time-tag-01]
1003 map period [draft-bormann-cbor-time-tag-01]
1004-22097 Unassigned
22098 multiple hint that indicates an additional level of indirection [][Marc_A._Lehmann]
22099-55798 Unassigned
55799 multiple Self-describe CBOR; see Section 2.4.5 [RFC7049]
55800-15309735 Unassigned
15309736 map (major type 5) RAINS Message [][Brian_Trammell]
15309737-18446744073709551615 Unassigned


ID Name Contact URI Last Updated
[Alfredo_Di_Napoli] Alfredo Di Napoli mailto:alfredo.dinapoli& 2017-08-25
[Brian_Trammell] Brian Trammell mailto:ietf& 2016-08-17
[Lucas_Clemente] Lucas Clemente mailto:lucas& 2014-07-01
[Marc_A._Lehmann] Marc A. Lehmann mailto:cbor& 2013-11-26
[Peter_Occil] Peter Occil mailto:poccil14& 2014-07-01