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Concise Binary Object Representation (CBOR) Tags for Time, Duration, and Period

Document Type Replaced Internet-Draft (cbor WG)
Expired & archived
Authors Carsten Bormann , Ben Gamari , Henk Birkholz
Last updated 2021-04-21 (Latest revision 2021-02-22)
Replaced by draft-ietf-cbor-time-tag
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-cbor-time-tag
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Concise Binary Object Representation (CBOR, RFC 8949) is a data format whose design goals include the possibility of extremely small code size, fairly small message size, and extensibility without the need for version negotiation. In CBOR, one point of extensibility is the definition of CBOR tags. RFC 8949 defines two tags for time: CBOR tag 0 (RFC3339 time as a string) and tag 1 (Posix time as int or float). Since then, additional requirements have become known. The present document defines a CBOR tag for time that allows a more elaborate representation of time, as well as related CBOR tags for duration and time period. It is intended as the reference document for the IANA registration of the CBOR tags defined.


Carsten Bormann
Ben Gamari
Henk Birkholz

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)