Internet Engineering Task Force (IETF)                     S. Hollenbeck
Request for Comments: 8605                                 Verisign Labs
Category: Informational                                        R. Carney
ISSN: 2070-1721                                             GoDaddy Inc.
                                                                May 2019


                        vCard Format Extensions:
   ICANN Extensions for the Registration Data Access Protocol (RDAP)

Abstract

   This document defines extensions to the vCard data format for
   representing and exchanging contact information used to implement the
   Internet Corporation for Assigned Names and Numbers (ICANN)
   operational profile for the Registration Data Access Protocol (RDAP).
   The property and parameter defined here are used to add values to
   RDAP responses that are consistent with ICANN policies.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are candidates for any level of Internet
   Standard; see Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8605.

Copyright Notice

   Copyright (c) 2019 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
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   publication of this document.  Please review these documents
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology Used in This Document . . . . . . . . . . . .   3
   2.  vCard Extensions: Properties  . . . . . . . . . . . . . . . .   3
     2.1.  Property: CONTACT-URI . . . . . . . . . . . . . . . . . .   3
   3.  vCard Extensions: Parameters  . . . . . . . . . . . . . . . .   4
     3.1.  Parameter: CC . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The "Temporary Specification for gTLD Registration Data" available at
   <https://www.icann.org/resources/pages/gtld-registration-data-specs-
   en> was published by the Internet Corporation for Assigned Named and
   Numbers (ICANN) in 2018.  The Temporary Specification includes
   requirements that cannot currently be met by the Registration Data
   Access Protocol (RDAP, [RFC7483]) without extending the underlying
   vCard [RFC6350] specification used to represent RDAP entity objects.
   This document includes specifications for an additional vCard
   property and an additional vCard parameter to meet the requirements
   of the Temporary Specification.

1.1.  Terminology Used in This Document

   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.

   Syntax specifications shown here use the augmented Backus-Naur Form
   (ABNF) as described in [RFC5234] and are specified as in the base
   vCard specification [RFC6350].

2.  vCard Extensions: Properties

   This document describes one new vCard extension property.

2.1.  Property: CONTACT-URI

   Namespace:

   Property name: CONTACT-URI

   Purpose: RDAP entity information can be redacted under certain
   circumstances (e.g., privacy).  The Temporary Specification requires
   that RDAP entity objects representing "Registrant", "Admin", and
   "Tech" contacts contain an email address or a location for a web form
   to facilitate email communication with the relevant contact in a way
   that does not identify the associated individual.  The CONTACT-URI
   property can be used to include URIs representing an email address or
   a location for a web form.

   Value type: A single URI value.

   Cardinality: *

   Property parameters: PREF

   Description: At least one "mailto", "http", or "https" URI value MUST
   be provided.  Additional CONTACT-URI properties MAY be provided to
   describe other contact methods.  If multiple CONTACT-URI properties
   are used, the vCard PREF parameter MUST be used to describe the most
   preferred property as described in Section 5.3 of RFC 6350 [RFC6350].

   Format definition:

      CONTACT-URI-param = "VALUE=uri" / pref-param ; pref-param from
      [RFC6350]

      CONTACT-URI-value = uri ; uri from [RFC3986]

   Examples:

      CONTACT-URI:https://contact.example.com

      CONTACT-URI;PREF=1:mailto:contact@example.com

3.  vCard Extensions: Parameters

   This document describes one new vCard extension parameter.

3.1.  Parameter: CC

   Namespace:

   Parameter name: CC

   Purpose: ICANN requires the use of ISO 3166 [ISO.3166.1988] two-
   letter codes, not "country names", in RDAP entity responses.  This
   parameter is used to extend the ADR property described in
   Section 6.3.1 of RFC 6350 [RFC6350].

   Description: This parameter contains the ISO 3166 [ISO.3166.1988]
   two-character country code associated with the "country name" ADR
   component described in Section 6.3.1 of RFC 6350 [RFC6350].

   Format definition:

      CC-param = "CC=" 2ALPHA

   Examples:

      ADR;TYPE=work;CC=US:;;54321 Oak St;Reston;VA;20190;USA

      ADR;TYPE=home;CC=US:;;12345 Elm St;Reston;VA;20190;USA

4.  IANA Considerations

   IANA has added the following entry to the "vCard Properties" registry
   defined in Section 10.3.1 of RFC 6350 [RFC6350].

   Namespace:

   Property: CONTACT-URI

   Reference: Section 2.1 of RFC 8605 (this RFC)

   IANA is requested to add the following entry to the vCard Parameters
   registry defined in Section 10.3.2 of RFC 6350 [RFC6350].

   Namespace:

   Property: CC

   Reference: Section 3.1 of RFC 8605 (this RFC)

5.  Security Considerations

   The CONTACT-URI value is purposefully intended to be a publicly
   visible contact reference; as such, it cannot require confidentiality
   protection.  There are, however, privacy implications in the choice
   of a URI scheme for the web form contact method.  An "https" URI
   value can be used to indicate support for confidentiality protection
   for connections to the server that publishes the web form.  This
   document presents no other security considerations beyond those
   described in Section 9 of the base vCard specification [RFC6350].

6.  References

6.1.  Normative References

   [ISO.3166.1988]
              International Organization for Standardization, "Codes for
              the representation of names of countries, 3rd edition",
              ISO Standard 3166, August 1988.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, DOI 10.17487/RFC3986, January 2005,
              <https://www.rfc-editor.org/info/rfc3986>.

   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234,
              DOI 10.17487/RFC5234, January 2008,
              <https://www.rfc-editor.org/info/rfc5234>.

   [RFC6350]  Perreault, S., "vCard Format Specification", RFC 6350,
              DOI 10.17487/RFC6350, August 2011,
              <https://www.rfc-editor.org/info/rfc6350>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

6.2.  Informative References

   [RFC7483]  Newton, A. and S. Hollenbeck, "JSON Responses for the
              Registration Data Access Protocol (RDAP)", RFC 7483,
              DOI 10.17487/RFC7483, March 2015,
              <https://www.rfc-editor.org/info/rfc7483>.

Acknowledgements

   The author would like to acknowledge the following individuals for
   their contributions to the development of this document: Rick
   Wilhelm.

Authors' Addresses

   Scott Hollenbeck
   Verisign Labs
   12061 Bluemont Way
   Reston, VA  20190
   United States of America

   Email: shollenbeck@verisign.com
   URI:   https://www.verisignlabs.com/


   Roger Carney
   GoDaddy Inc.
   14455 N. Hayden Rd. #219
   Scottsdale, AZ  85260
   United States of America

   Email: rcarney@godaddy.com
   URI:   http://www.godaddy.com