Concise Binary Object Representation (CBOR) Tag for Date
draft-jones-cbor-date-tag-00

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CBOR Working Group                                              M. Jones
Internet-Draft                                                A. Nadalin
Intended status: Standards Track                               Microsoft
Expires: September 10, 2020                                March 9, 2020

        Concise Binary Object Representation (CBOR) Tag for Date
                      draft-jones-cbor-date-tag-00

Abstract

   The Concise Binary Object Representation (CBOR, RFC 7049) 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 7049 defines two tags for time: CBOR tag 0 (RFC 3339 date/time
   string) and tag 1 (Posix "seconds since the epoch").  Since then,
   additional requirements have become known.  This specification
   defines a CBOR tag for an RFC 3339 date text string, for applications
   needing a date representation without a time.  It is intended as the
   reference document for the IANA registration of the CBOR tag defined.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on September 10, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Jones & Nadalin        Expires September 10, 2020               [Page 1]
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Notation and Conventions . . . . . . . . . .   2
   2.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   2
     2.1.  Concise Binary Object Representation (CBOR) Tags
           Registrations . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   4.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     4.2.  Informative References  . . . . . . . . . . . . . . . . .   3
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   4
   Document History  . . . . . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   The Concise Binary Object Representation (CBOR) [RFC7049] provides
   for the interchange of structured data without a requirement for a
   pre-agreed schema.  RFC 7049 defines a basic set of data types, as
   well as a tagging mechanism that enables extending the set of data
   types supported via an IANA registry.

   This specification defines a CBOR tag for a text string representing
   a date but not a time.  The tagged text string is represented as
   specified by the RFC 3339 [RFC3339] "full-date" production.

1.1.  Requirements Notation and Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

2.  IANA Considerations

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2.1.  Concise Binary Object Representation (CBOR) Tags Registrations

   This section registers the following value in the IANA "Concise
   Binary Object Representation (CBOR) Tags" registry [IANA.cbor-tags].

   o  Tag: 1004 (value requested)
   o  Data Item: UTF-8 text string
   o  Semantics: RFC 3339 full-date string
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