Concise Binary Object Representation Maintenance and Extensions
charter-ietf-cbor-00-04

Concise Binary Object Representation (CBOR, RFC 7049) extends the
JavaScript Object Notation (JSON, RFC 7159) data interchange format to include
binary data and an extensibility model, using a binary representation format that
is easy to parse correctly. It has been picked up by a number of IETF efforts
(e.g., CORE, ANIMA GRASP) as a message format.

The CBOR working group will update RFC 7049 to fix verified errata. Security
issues and clarifications may be addressed, but changes to the document will
ensure backward compatibility for popular deployed codebases. The resulting
document will be targeted at becoming an Internet Standard.

Similar to the way ABNF (RFC 5234/7405) can be used to describe the set of valid
messages in a text representation, it would be useful if protocol specifications
could use a description format for the data in CBOR-encoded messages. The CBOR
data definition language (CDDL, based on draft-greevenbosch-appsawg-cbor-cddl)
is a proposal for such a description technique that has already been used in
CORE, ANIMA, CDNI, and efforts outside the IETF. The CBOR WG will complete the
development of this specification by creating an Informational or Standards
Track RFC.

In parallel to the work on CDDL, the WG will examine the CBOR extension for
tagging of Typed Arrays (based on draft-jroatch-cbor-tags) and the CBOR
extension for tagging of Object Identifiers and UUIDs (based on
draft-bormann-cbor-tags-oid) that use CBOR's extensibility mechanisms to provide
additional data types as used in certain applications. Where these proposals are
deemed useful and do not require significant new development, the CBOR WG will
complete these specifications as well. The WG will recharter before working on
any further CBOR extensions.