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JSContact: Converting from and to vCard
draft-ietf-calext-jscontact-vcard-06

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RFC 9555
The information below is for an old version of the document.
Document	Type	This is an older version of an Internet-Draft that was ultimately published as RFC 9555.
	Authors	Mario Loffredo , Robert Stepanek
	Last updated	2023-03-23 (Latest revision 2023-01-10)
	Replaces	draft-ietf-jmap-jscontact-vcard
	RFC stream	Internet Engineering Task Force (IETF)
	Formats	txt html xml htmlized bibtex bibxml
	Reviews	SECDIR IETF Last Call review by Phillip Hallam-Baker Serious issues ARTART IETF Last Call review by Paul Kyzivat Ready w/issues GENART IETF Last Call review by Russ Housley Almost ready
	Additional resources	Mailing list discussion
Stream	WG state	Submitted to IESG for Publication
	Associated WG milestone	Nov 2022 Submit JSON Contact document to IESG
	Document shepherd	Daniel Migault
	Shepherd write-up	Show Last changed 2023-01-10
IESG	IESG state	Became RFC 9555 (Proposed Standard)
	Consensus boilerplate	Yes
	Telechat date	(None)
	Responsible AD	Francesca Palombini
	Send notices to	mglt.ietf@gmail.com
IANA	IANA review state	IANA OK - Actions Needed
	IANA expert review state	Expert Reviews OK
Email authors Email WG IPR References Referenced by Nits Search email archive
draft-ietf-calext-jscontact-vcard-06
calext                                                       M. Loffredo
Internet-Draft                                       IIT-CNR/Registro.it
Intended status: Standards Track                             R. Stepanek
Expires: 14 July 2023                                           Fastmail
                                                         10 January 2023

                JSContact: Converting from and to vCard
                  draft-ietf-calext-jscontact-vcard-06

Abstract

   This document defines how to convert contact information defined in
   the JSContact specification from and to vCard.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 14 July 2023.

Copyright Notice

   Copyright (c) 2023 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 (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 to this document.  Code Components
   extracted from this document must include Revised BSD License text as
   described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Revised BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Notational Conventions  . . . . . . . . . . . . . . . . .   5
     1.3.  ABNF Notations  . . . . . . . . . . . . . . . . . . . . .   5
   2.  Converting vCard to JSContact . . . . . . . . . . . . . . . .   5
     2.1.  General rules . . . . . . . . . . . . . . . . . . . . . .   5
       2.1.1.  The uid property  . . . . . . . . . . . . . . . . . .   5
       2.1.2.  Choosing identifiers  . . . . . . . . . . . . . . . .   5
     2.2.  vCard Value Data Types  . . . . . . . . . . . . . . . . .   6
       2.2.1.  BOOLEAN . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.2.  DATE, TIME, DATE-TIME, DATE-AND-OR-TIME, and
               TIMESTAMP . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.3.  INTEGER . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.4.  FLOAT . . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.5.  LANGUAGE-TAG  . . . . . . . . . . . . . . . . . . . .   6
       2.2.6.  TEXT  . . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.7.  URI . . . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.8.  UTC-OFFSET  . . . . . . . . . . . . . . . . . . . . .   6
     2.3.  vCard Parameters  . . . . . . . . . . . . . . . . . . . .   7
       2.3.1.  ALTID . . . . . . . . . . . . . . . . . . . . . . . .   7
       2.3.2.  AUTHOR  . . . . . . . . . . . . . . . . . . . . . . .   7
       2.3.3.  AUTHOR-NAME . . . . . . . . . . . . . . . . . . . . .   7
       2.3.4.  CALSCALE  . . . . . . . . . . . . . . . . . . . . . .   7
       2.3.5.  CREATED . . . . . . . . . . . . . . . . . . . . . . .   7
       2.3.6.  DERIVED . . . . . . . . . . . . . . . . . . . . . . .   8
       2.3.7.  GEO . . . . . . . . . . . . . . . . . . . . . . . . .   8
       2.3.8.  GROUP . . . . . . . . . . . . . . . . . . . . . . . .   8
       2.3.9.  INDEX . . . . . . . . . . . . . . . . . . . . . . . .   9
       2.3.10. LANGUAGE  . . . . . . . . . . . . . . . . . . . . . .   9
       2.3.11. LEVEL . . . . . . . . . . . . . . . . . . . . . . . .  11
       2.3.12. MEDIATYPE . . . . . . . . . . . . . . . . . . . . . .  11
       2.3.13. PID . . . . . . . . . . . . . . . . . . . . . . . . .  12
       2.3.14. PREF  . . . . . . . . . . . . . . . . . . . . . . . .  12
       2.3.15. PROP-ID . . . . . . . . . . . . . . . . . . . . . . .  12
       2.3.16. RANKS . . . . . . . . . . . . . . . . . . . . . . . .  12
       2.3.17. SERVICE-TYPE  . . . . . . . . . . . . . . . . . . . .  13
       2.3.18. SORT-AS . . . . . . . . . . . . . . . . . . . . . . .  13
       2.3.19. TYPE  . . . . . . . . . . . . . . . . . . . . . . . .  13
       2.3.20. TZ  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     2.4.  VALUE . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     2.5.  General Properties  . . . . . . . . . . . . . . . . . . .  13
       2.5.1.  BEGIN and END . . . . . . . . . . . . . . . . . . . .  13
       2.5.2.  KIND  . . . . . . . . . . . . . . . . . . . . . . . .  13
       2.5.3.  SOURCE  . . . . . . . . . . . . . . . . . . . . . . .  14
       2.5.4.  XML . . . . . . . . . . . . . . . . . . . . . . . . .  14
     2.6.  Identification Properties . . . . . . . . . . . . . . . .  14

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       2.6.1.  BDAY, BIRTHPLACE, DEATHDATE, DEATHPLACE,
               ANNIVERSARY . . . . . . . . . . . . . . . . . . . . .  14
       2.6.2.  GENDER  . . . . . . . . . . . . . . . . . . . . . . .  16
       2.6.3.  GRAMMATICAL-GENDER and PRONOUNS . . . . . . . . . . .  16
       2.6.4.  FN  . . . . . . . . . . . . . . . . . . . . . . . . .  16
       2.6.5.  N and NICKNAME  . . . . . . . . . . . . . . . . . . .  17
       2.6.6.  PHOTO . . . . . . . . . . . . . . . . . . . . . . . .  19
     2.7.  Delivery Addressing Properties  . . . . . . . . . . . . .  19
       2.7.1.  ADR . . . . . . . . . . . . . . . . . . . . . . . . .  19
     2.8.  Communications Properties . . . . . . . . . . . . . . . .  21
       2.8.1.  CONTACT-CHANNEL-PREF  . . . . . . . . . . . . . . . .  21
       2.8.2.  EMAIL . . . . . . . . . . . . . . . . . . . . . . . .  22
       2.8.3.  IMPP  . . . . . . . . . . . . . . . . . . . . . . . .  23
       2.8.4.  LANG  . . . . . . . . . . . . . . . . . . . . . . . .  23
       2.8.5.  LOCALE  . . . . . . . . . . . . . . . . . . . . . . .  24
       2.8.6.  SOCIALPROFILE . . . . . . . . . . . . . . . . . . . .  25
       2.8.7.  TEL . . . . . . . . . . . . . . . . . . . . . . . . .  25
     2.9.  Geographical Properties . . . . . . . . . . . . . . . . .  26
       2.9.1.  GEO . . . . . . . . . . . . . . . . . . . . . . . . .  26
       2.9.2.  TZ  . . . . . . . . . . . . . . . . . . . . . . . . .  26
       2.9.3.  Combining geographical properties . . . . . . . . . .  27
     2.10. Organizational Properties . . . . . . . . . . . . . . . .  27
       2.10.1.  CONTACT-URI  . . . . . . . . . . . . . . . . . . . .  27
       2.10.2.  LOGO . . . . . . . . . . . . . . . . . . . . . . . .  27
       2.10.3.  MEMBER . . . . . . . . . . . . . . . . . . . . . . .  28
       2.10.4.  ORG  . . . . . . . . . . . . . . . . . . . . . . . .  28
       2.10.5.  RELATED  . . . . . . . . . . . . . . . . . . . . . .  29
       2.10.6.  TITLE and ROLE . . . . . . . . . . . . . . . . . . .  30
     2.11. Personal Information Properties . . . . . . . . . . . . .  31
       2.11.1.  EXPERTISE  . . . . . . . . . . . . . . . . . . . . .  31
       2.11.2.  HOBBY  . . . . . . . . . . . . . . . . . . . . . . .  32
       2.11.3.  INTEREST . . . . . . . . . . . . . . . . . . . . . .  33
       2.11.4.  ORG-DIRECTORY  . . . . . . . . . . . . . . . . . . .  33
     2.12. Explanatory Properties  . . . . . . . . . . . . . . . . .  34
       2.12.1.  CATEGORIES . . . . . . . . . . . . . . . . . . . . .  34
       2.12.2.  CLIENTPIDMAP and PID Parameter . . . . . . . . . . .  34
       2.12.3.  CREATED  . . . . . . . . . . . . . . . . . . . . . .  34
       2.12.4.  NOTE . . . . . . . . . . . . . . . . . . . . . . . .  35
       2.12.5.  PRODID . . . . . . . . . . . . . . . . . . . . . . .  35
       2.12.6.  REV  . . . . . . . . . . . . . . . . . . . . . . . .  35
       2.12.7.  SOUND  . . . . . . . . . . . . . . . . . . . . . . .  36
       2.12.8.  UID  . . . . . . . . . . . . . . . . . . . . . . . .  36
       2.12.9.  URL  . . . . . . . . . . . . . . . . . . . . . . . .  36
       2.12.10. VERSION  . . . . . . . . . . . . . . . . . . . . . .  37
       2.12.11. X-ABLabel  . . . . . . . . . . . . . . . . . . . . .  37
     2.13. Security Properties . . . . . . . . . . . . . . . . . . .  37
       2.13.1.  KEY  . . . . . . . . . . . . . . . . . . . . . . . .  37
     2.14. Calendar Properties . . . . . . . . . . . . . . . . . . .  38

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       2.14.1.  CALADRURI  . . . . . . . . . . . . . . . . . . . . .  38
       2.14.2.  CALURI . . . . . . . . . . . . . . . . . . . . . . .  38
       2.14.3.  FBURL  . . . . . . . . . . . . . . . . . . . . . . .  39
     2.15. Extended Properties and Parameters  . . . . . . . . . . .  40
     2.16. New JSContact properties  . . . . . . . . . . . . . . . .  40
       2.16.1.  Property vCardProps  . . . . . . . . . . . . . . . .  40
       2.16.2.  Property vCardParams . . . . . . . . . . . . . . . .  41
   3.  Converting JSContact to vCard . . . . . . . . . . . . . . . .  41
     3.1.  Conversion Rules  . . . . . . . . . . . . . . . . . . . .  41
     3.2.  New vCard Properties and Parameters . . . . . . . . . . .  54
       3.2.1.  Property JSCONTACT-PROP . . . . . . . . . . . . . . .  54
       3.2.2.  Parameter JSPTR . . . . . . . . . . . . . . . . . . .  56
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  56
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  56
     5.1.  New vCard Properties  . . . . . . . . . . . . . . . . . .  56
     5.2.  New vCard Parameters  . . . . . . . . . . . . . . . . . .  57
     5.3.  New JSContact Properties  . . . . . . . . . . . . . . . .  57
     5.4.  New JSContact Types . . . . . . . . . . . . . . . . . . .  58
   6.  Implementation Status . . . . . . . . . . . . . . . . . . . .  58
     6.1.  CNR . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  59
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  59
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  60
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  60

1.  Introduction

1.1.  Motivation

   The JSContact data model and format [I-D.ietf-calext-jscontact] aims
   to be an alternative to the widely used vCard [RFC6350] standard and
   jCard [RFC7095].

   While applications might prefer JSContact to exchange contact card
   data with other systems, they are likely to interoperate with
   services and clients that only support vCard or jCard.  Similarly,
   existing contact data providers and consumers already using vCard or
   jCard might want to represent their contact data also in JSContact.

   To achieve this, this document defines standard rules to convert
   contact data between JSContact and vCard (and consequently jCard).

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1.2.  Notational 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.

1.3.  ABNF Notations

   The ABNF definitions in this document use the notations of [RFC5234].
   ABNF rules not defined in this document either are defined in
   [RFC5234] (such as the ABNF for CRLF, WSP, DQUOTE, VCHAR, ALPHA, and
   DIGIT) or [RFC6350].

2.  Converting vCard to JSContact

   This section contains the conversion rules from vCard to JSContact
   Card.  Its follows the same structure as the vCard v4 RFC document
   [RFC6350].  Properties and parameters of vCard extension RFCs,
   including the vCard JSContact Extension RFC
   [I-D.ietf-calext-vcard-jscontact-extensions] are added to appropriate
   subsections.

2.1.  General rules

2.1.1.  The uid property

   The UID property in vCard is optional, but the uid property in
   JSContact is mandatory.  Implementations that convert a vCard without
   UID property MUST generate a unique identifier as a value for the uid
   property.  They SHOULD generate the same identifier when repeatedly
   converting the same vCard, but they MAY generate different values.
   Consequently, a vCard without UID property MAY not convert to one
   exact instance of a JSContact card.

2.1.2.  Choosing identifiers

   Multi-valued properties in JSContact typically are represented as a
   JSON object where the object keys are of the Id type and the object
   values are the converted vCard property.  In absence of the PROP-ID
   parameter (see Section 2.3.15), implementations are free to choose
   any identifier for such entries.  Whatever identifier generation
   scheme implementations use, they SHOULD generate values of short
   character length.  For example, this could be an incrementing number
   across all Ids or only unique within one JSON object.

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2.2.  vCard Value Data Types

2.2.1.  BOOLEAN

   This converts to the JSContact Boolean type.

2.2.2.  DATE, TIME, DATE-TIME, DATE-AND-OR-TIME, and TIMESTAMP

   The TIMESTAMP type generally converts to the UTCDateTime.  It
   converts to the Timestamp type for anniversaries.

   The DATE type converts to the PartialDate type, which only is
   relevant for anniversaries.  This does not apply to DATE values that
   only define a month or a day.

   The TIME, DATE-TIME, DATE-AND-OR-TIME types and DATE type values that
   only define a month or day do not convert to any JSContact type.
   vCard properties or parameters having such values MAY convert as
   defined in Section 2.16.

2.2.3.  INTEGER

   This converts to the JSContact Int and UnsignedInt types.

2.2.4.  FLOAT

   This converts to the JSContact Number type.

2.2.5.  LANGUAGE-TAG

   This converts to the JSContact String type.

2.2.6.  TEXT

   This converts to the JSContact String type.

2.2.7.  URI

   This converts to the JSContact String type.

2.2.8.  UTC-OFFSET

   This either converts to a String containing an IANA TimeZone Database
   entry name (see Section 2.9.2), or it does not convert to any
   JSContact type.  For the latter, vCard properties or parameters
   having such values MAY convert to JSContact as defined in
   Section 2.16.

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2.3.  vCard Parameters

2.3.1.  ALTID

   This does not convert to an IANA-registered property in JSContact,
   but several conversion rules make use of this parameter to combine
   multiple vCard properties into a single JSContact object instance.
   For an example of this see Section 2.7.1.  To preserve the verbatim
   value of the ALTID parameter, set the JSContact extension properties
   props or params defined in Section 2.16.

2.3.2.  AUTHOR

   The AUTHOR parameter value of a vCard NOTE property converts to the
   uri property of the Author object for this note.  To convert this
   parameter for other vCard properties, see Section 2.16.2.

   Note: This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.3.3.  AUTHOR-NAME

   The AUTHOR-NAME parameter value of a vCard NOTE property converts to
   the name property of the Author object for this note.  To convert
   this parameter for other vCard properties, see Section 2.16.2.

   Note: This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.3.4.  CALSCALE

   This parameter set on a BDAY, DEATHDATE or ANNIVERSARY property
   converts to the calendarScale property of the PartialDate object
   type.  To convert this parameter for other vCard properties, see
   Section 2.16.2.

2.3.5.  CREATED

   The CREATED parameter value of a vCard NOTE property converts to the
   created property of the Note object.  To convert this parameter for
   other vCard properties, see Section 2.16.2.

   Note: This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

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2.3.6.  DERIVED

   If this parameter is set to true on a vCard property, then
   implementations MAY choose to not convert that property.  Note: This
   parameter is defined in [I-D.ietf-calext-vcard-jscontact-extensions].

2.3.7.  GEO

   This parameter set on an ADR property converts to the JSContact
   coordinates property of the Address object that represents the vCard
   ADR.  To convert this parameter for other vCard properties, see
   Section 2.16.2.

2.3.8.  GROUP

   This parameter exclusively is for use in jCard (see Section 7.1 of
   [RFC7095]).  It MUST NOT be set in a vCard.  Preserving the exact
   group name when converting from vCard to JSContact and back to vCard
   is not necessary.  Any group identifiers will do, as long as the
   resulting vCard groups its properties equally to the original vCard.
   Implementations that still wish to preserve the exact property group
   name of a vCard property MAY set the group parameter in the JSContact
   extension properties props or params defined in Section 2.16.

   item1.TEL;VALUE=uri:tel:+1-555-555-5555
   "phones": {
     "p1": {
       "@type": "Phone",
       "number": "tel:+1-555-555-5555",
       "vCardParams" : {
        "group" : "item1"
       }
     }
   }

    Figure 1: An example how to preserve the group name in params during
                                conversion.

   item2.X-FOO:bar
   "vCardProps": [
     ["x-foo", {
       "group": "item2"
     }, "unknown", "bar"]
   ]

        Figure 2: An example how to preserve the group name in props
                             during conversion.

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2.3.9.  INDEX

   This parameter set on the EXPERTISE, HOBBY, INTEREST and ORG-
   DIRECTORY properties defined in [RFC6715] converts to the JSContact
   listAs property of the PersonalInfo and DirectoryResource objects.
   To convert this parameter for other vCard properties, see
   Section 2.16.2.

2.3.10.  LANGUAGE

   This converts to an entry in the localizations property for the vCard
   property that this parameter is set on.  The value of the LANGUAGE
   parameter defines the language tag key in the localizations property.

   This specification does not define a single standard conversion rule
   for how to convert the property values.  Instead, building the
   localizations value is implementation-specific.

   Two options to populate the localizations property are:

   *  One Patch Per Property: For each vCard property with a LANGUAGE
      parameter, set the complete path in the PatchObject to the
      JSContact property that the vCard property converts to.  The value
      of the patch is the converted property value.  This is simple to
      process and adequate if the vCard only contains a few properties
      with LANGUAGE parameter.

   *  Bundle Patches by Parent: If a PatchObject contains multiple paths
      that have the same parent paths, then it might be possible to
      combine these patches into one patch that patches the parent
      property.  This is possible if the property in the Card is patched
      in its entirety.

   A non-localized Card SHOULD NOT provide less information than any of
   its localizations.

   As a general rule, an implementation SHOULD choose those vCard
   properties to convert to the non-localized card, that either all have
   the same LANGUAGE parameter value or none at all.  Figure 3
   illustrates this.

   FN;LANGUAGE=EN:John Doe
   TITLE;LANGUAGE=EN:Boss
   TITLE;LANGUAGE=fr:Patron

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   "locale": "en",
   "fullName": "John Doe",
   "titles": {
     "t1": {
       "@type": "Title",
       "title": "Boss"
     }
   },
   "localizations": {
     "fr": {
       "titles/t1/title": "Patron"
     }
   }

        Figure 3: LANGUAGE conversion example: one dominant language

   As a special case, if one or more vCard properties of the same type
   do not have the LANGUAGE parameter set, then choose them to the non-
   localized Card.  Convert any with LANGUAGE parameters to the
   localizations property.Figure 4 illustrates this.

   FN:John Doe
   TITLE:Boss
   TITLE;LANGUAGE=fr:Patron
   "titles": {
     "t1": {
       "@type": "Title",
       "title": "Boss"
     }
   },
   "localizations": {
     "fr": {
       "titles/t1/title": "Patron"
     }
   }

      Figure 4: LANGUAGE conversion example: property without language

   As the least preferred option, Figure 5 illustrates how all vCard
   properties of the same type have the LANGUAGE parameter set, but none
   of their language tags match the locale of the main Card.  In this
   case, implementations MAY choose to add the localized vCard
   properties only to the localizations object.  Implementations SHOULD
   avoid this scenario as much as possible.

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   LOCALE:es
   FN:Gabriel García Márquez
   TITLE;LANGUAGE=en:Boss
   TITLE;LANGUAGE=fr:Patron
   "locale": "es",
   "fullName": "Gabriel García Márquez",
   "localizations": {
     "en": {
       "titles": {
         "t1": {
           "@type": "Title",
           "title": "Novelist"
         }
     },
     "fr": {
       "titles": {
         "t1": {
           "@type": "Title",
           "title": "Écrivain"
         }
     }
   }

       Figure 5: LANGUAGE conversion example: conflicting locale and
                                  language

2.3.11.  LEVEL

   The LEVEL parameter as defined in [RFC6715] is directly converted to
   the level property of the PersonalInfo type apart from when LEVEL is
   used in the EXPERTISE property; in this case, the values convert as
   in the following:

   *  "beginner" converts to "low";
   *  "average" converts to "medium";
   *  "expert" converts to "high".

   To convert this parameter for other vCard properties, see
   Section 2.16.2.

2.3.12.  MEDIATYPE

   This converts to the mediaType property of the Resource object type.
   To convert this parameter for other vCard properties, see
   Section 2.16.2.

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2.3.13.  PID

   This does not convert to an IANA-registered property in JSContact.
   To convert this parameter, see Section 2.16.2.

2.3.14.  PREF

   This converts to the pref property.

2.3.15.  PROP-ID

   The PROP-ID parameter value of a vCard property converts to the Id of
   the JSContact property to which the vCard property converts to.

   TEL;PROP-ID=PHONE-A;VALUE=uri;PREF=1;TYPE="voice,home"
     :tel:+1-555-555-5555;ext=5555
   TEL;PROP-ID=PHONE-B;VALUE=uri;TYPE=home
     :tel:+33-01-23-45-67
   "phones": {
     "PHONE-A": {
       "@type": "Phone",
       "contexts": { "private": true },
       "features": { "voice": true },
       "number": "tel:+1-555-555-5555;ext=5555",
       "pref": 1
     },
     "PHONE-B": {
       "@type": "Phone",
       "contexts": { "private": true },
       "number": "tel:+33-01-23-45-67"
     }
   }

                    Figure 6: PROP-ID conversion example

   Note: This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.3.16.  RANKS

   The values of this parameter convert to the rank property of the
   NameComponent objects inferred from the N property value.  To convert
   this parameter for other vCard properties, see Section 2.16.2.  Note:
   This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

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2.3.17.  SERVICE-TYPE

   This converts to the service property of the OnlineService object
   type.  To convert this parameter for other vCard properties, see
   Section 2.16.2.  Note: This parameter is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.3.18.  SORT-AS

   This converts to the sortAs properties defined for the Name,
   Organization and OrgUnit object types.  To convert this parameter for
   other vCard properties, see Section 2.16.2.

2.3.19.  TYPE

   This converts to the contexts property as well as property-specific
   type property values defined in later sections.

2.3.20.  TZ

   This parameter set on an ADR property converts to the JSContact
   timeZone property of the Address object that represents the vCard
   ADR.  Also see the conversion of the TZ property in Section 2.9.2.
   To convert this parameter for other vCard properties, see
   Section 2.16.2.

2.4.  VALUE

   This does not convert to an IANA-registered property in JSContact.
   To preserve properties with experimental values, see Section 2.16.2
   and Section 2.16.1.

2.5.  General Properties

2.5.1.  BEGIN and END

   These do not convert to IANA-registered properties in JSContact.

2.5.2.  KIND

   The KIND property converts to the kind property (Figure 7).  Allowed
   values are those described in Section 6.1.4 of [RFC6350] and extended
   with the values declared in [RFC6473] and [RFC6869].

   KIND:individual
   "kind": "individual"

                     Figure 7: KIND conversion example

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2.5.3.  SOURCE

   A SOURCE property converts to an entry in the directories property
   (Figure 8).  The entry value is a DirectoryResource object whose type
   property is set to entry and uri property is set to the SOURCE value.

   The PREF and MEDIATYPE parameters convert according to the rules as
   defined in Section 2.3.

   SOURCE:http://dir.example.com/addrbook/jdoe/Jean%20Dupont.vcf
   "directories": {
      "ENTRY-1": {
        "@type": "DirectoryResource",
        "type": "entry",
        "uri": "http://dir.example.com/addrbook/jdoe/Jean%20Dupont.vcf"
      }
   }

                    Figure 8: SOURCE conversion example

2.5.4.  XML

   This does not convert to an IANA-registered property in JSContact.

2.6.  Identification Properties

2.6.1.  BDAY, BIRTHPLACE, DEATHDATE, DEATHPLACE, ANNIVERSARY

   The BDAY and ANNIVERSARY properties and the extensions BIRTHPLACE,
   DEATHDATE, DEATHPLACE described in [RFC6474] are represented as
   Anniversary objects included in the anniversaries property
   (Figure 9):

   *  BDAY and BIRTHPLACE convert to date and place where type is set to
      "birth";
   *  DEATHDATE and DEATHPLACE convert to date and place where type is
      set to "death";
   *  ANNIVERSARY converts to date where type is "wedding".

   Both birth and death places are represented as instances of the
   Address object.

   The BIRTHPLACE and DEATHPLACE properties that are represented as geo
   URIs convert to Address instances including only the coordinates
   property.  If the URI value is not a geo URI, the place is ignored.

   The ALTID and LANGUAGE parameters of both BIRTHPLACE and DEATHPLACE
   properties convert according to the rules as defined in Section 2.3.

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BDAY:19531015T231000Z
BIRTHPLACE:Mail Drop: TNE QB\n123 Main Street\nAny Town, CA 91921-1234\nU.S.A.
DEATHDATE:19960415
DEATHPLACE:4445 Courtright Street\nNew England, ND 58647\nU.S.A.
ANNIVERSARY:19860201
"anniversaries": {
  "ANNIVERSARY-1" : {
    "@type": "Anniversary",
    "type": "birth",
    "date": {
      "@type": "Timestamp",
      "utc": "1953-10-15T23:10:00Z"
    },
    "place": {
      "@type": "Address",
      "fullAddress": "Mail Drop: TNE QB\n123 Main Street\nAny Town, CA 91921-1234\nU.S.A."
    }
  },
  "ANNIVERSARY-2" : {
    "@type": "Anniversary",
    "type": "death",
    "date": {
      "@type": "PartialDate",
      "year": 1996,
      "month": 4,
      "year": 15
    },
    "place": {
      "@type": "Address",
      "fullAddress": "4445 Courtright Street\nNew England, ND 58647\nU.S.A."
    }
  },
  "ANNIVERSARY-3" : {
    "@type": "Anniversary",
    "type": "wedding",
    "date": {
      "@type": "PartialDate",
      "year": 1986,
      "month": 2,
      "day": 1
    }
  }
}

    Figure 9: BDAY, BIRTHPLACE, DEATHDATE, DEATHPLACE, ANNIVERSARY
                          conversion example

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2.6.2.  GENDER

   This does not map to an IANA-registered property in JSContact.  To
   convert this property, see Section 2.16.1.  Note the alternative
   JSContact speakToAs property which defines how to address and refer
   to an individual represented by the card, as do the newly defined
   vCard GRAMMATICAL-GENDER and PRONOUNS properties of
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.6.3.  GRAMMATICAL-GENDER and PRONOUNS

   The GRAMMATICAL-GENDER property converts to the grammaticalGender
   property of the SpeakToAs object (Figure 10).

   The PRONOUNS property converts to an entry in the pronouns property
   of the SpeakToAs object (Figure 10).

   GRAMMATICAL-GENDER:NEUTER
   PRONOUNS;PREF=2:they/them
   PRONOUNS;PREF=1:xe/xir
   "speakToAs": {
     "grammaticalGender": "neuter",
     "pronouns": {
       "PRONOUNS-1": {
         "@type": "Pronouns",
         "pronouns": "they/them",
         "pref": 2
       },
       "PRONOUNS-2": {
         "@type": "Pronouns",
         "pronouns": "xe/xir",
         "pref": 1
       }
     }
   }

       Figure 10: GRAMMATICAL-GENDER and PRONOUNS conversion example

2.6.4.  FN

   All the FN instances are represented through the fullName property
   (Figure 11).  The presence of multiple instances is implicitly
   associated with the full name translation in various languages
   regardless of the presence of the ALTID parameter.  Each translation
   converts according to the rules as defined in Section 2.3.

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2.6.5.  N and NICKNAME

   The N instances convert to equivalent items of the components array
   of the name property (Figure 11): the N components convert into
   related NameComponent objects as presented in Table 1.  Name
   components SHOULD be ordered such that their values joined by
   whitespace produce a valid full name of this entity.

   Each comma-separated item of the SORT-AS parameter value converts to
   an entry of the sortAs property where the key is the "type" value
   related to the sorted N component and the value is the corresponding
   item.  Absence of a key in the sortAs indicates that its related part
   in the SORT-AS parameter value MUST either the empty string followed
   by COMMA, or no further SORT-AS parts are defined.

                   +====================+==============+
                   | N component        | "type" value |
                   +====================+==============+
                   | Honorific Prefixes | prefix       |
                   +--------------------+--------------+
                   | Given Names        | given        |
                   +--------------------+--------------+
                   | Family Names       | surname      |
                   +--------------------+--------------+
                   | Additional Names   | middle       |
                   +--------------------+--------------+
                   | Honorific Suffixes | suffix       |
                   +--------------------+--------------+

                      Table 1: N components conversion

   A NICKNAME property converts to an entry in the nickNames property
   (Figure 11).  The entry value is a NickName object.  The name
   property is set to the NICKNAME value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

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"fullName": "Mr.  John Q.  Public, Esq.",
"name": {
    "@type": "Name",
    "components":[
      { "@type": "NameComponent", "type": "prefix", "value": "Mr."  },
      { "@type": "NameComponent", "type": "given", "value": "John" },
      { "@type": "NameComponent", "type": "surname", "value": "Public" },
      { "@type": "NameComponent", "type": "middle", "value": "Quinlan" },
      { "@type": "NameComponent", "type": "suffix", "value": "Esq." }
    ],
    "sortAs": {
        "surname": "Public",
        "given": "John"
    }
},
"nickNames": {
   "NICK-1": {
      "@type": "NickName",
      "name": "Johnny"
   }
}
"fullName": "Mr.  John Q.  Public, Esq.",
"name": {
    "@type": "Name",
    "components":[
      { "@type": "NameComponent", "type": "prefix", "value": "Mr."  },
      { "@type": "NameComponent", "type": "given", "value": "John" },
      { "@type": "NameComponent", "type": "surname", "value": "Public" },
      { "@type": "NameComponent", "type": "middle", "value": "Quinlan" },
      { "@type": "NameComponent", "type": "suffix", "value": "Esq." }
    ],
    "sortAs": {
        "surname": "Public",
        "given": "John"
    }
},
"nickNames": {
   "NICK-1": {
      "@type": "NickName",
      "name": "Johnny"
   }
}

            Figure 11: FN, N, NICKNAME conversion example

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2.6.6.  PHOTO

   A PHOTO property converts to an entry in the media property
   (Figure 12).  The entry value is a MediaResource object whose type
   property is set to photo and uri property is set to the PHOTO value.

   The PREF and MEDIATYPE parameters convert according to the rules as
   defined in Section 2.3.

   PHOTO:http://www.example.com/pub/photos/jqpublic.gif
   "media": {
      "PHOTO-1": {
        "@type": "MediaResource",
        "type": "photo",
        "uri": "http://www.example.com/pub/photos/jqpublic.gif"
      }
   }

                    Figure 12: PHOTO conversion example

2.7.  Delivery Addressing Properties

2.7.1.  ADR

   An ADR property converts to an entry in the addresses property
   (Figure 13).  The entry value is an Address object.

   The ADR components convert into the Address properties as presented
   in Table 2 and Table 3.

                    +===============+================+
                    | ADR component | Address member |
                    +===============+================+
                    | locality      | locality       |
                    +---------------+----------------+
                    | region        | region         |
                    +---------------+----------------+
                    | postal code   | postcode       |
                    +---------------+----------------+
                    | country name  | country        |
                    +---------------+----------------+

                       Table 2: ADR components vs.
                        Address members conversion

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     +===============+======================+========================+
     | ADR component | Single               | Combination of         |
     |               | StreetComponent item | StreetComponent items  |
     +===============+======================+========================+
     | post office   | postOfficeBox        |                        |
     | box           |                      |                        |
     +---------------+----------------------+------------------------+
     | extended      | extension            | extension, building,   |
     | address       |                      | floor, room, apartment |
     +---------------+----------------------+------------------------+
     | street        | name                 | name, number,          |
     | address       |                      | direction              |
     +---------------+----------------------+------------------------+

       Table 3: ADR components vs.  StreetComponent items conversion

   Applications SHOULD separate the ADR "street address" component into
   street name, number and directions.  If they can not determine the
   respective street components from the ADR "street address"", then
   they SHOULD convert these to a single name StreetComponent object.

   The "street address" and "extended address" ADR components MAY be
   converted into either a single StreetComponent item or a combination
   of StreetComponent items.

   The LABEL parameter converts to the fullAddress property.

   The GEO parameter converts to the coordinates property.

   The TZ parameter converts to the timeZone property.

   The CC parameter as defined in [RFC8605] converts to the countryCode
   property.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   The ALTID and LANGUAGE parameters convert according to the rules as
   defined in Section 2.3.  Each possible language-dependent alternative
   is represented as an entry of the PatchObject map where the key
   references the fullAddress property.

ADR;TYPE=work;CC=US:;;54321 Oak St;Reston;VA;20190;USA
ADR;TYPE=home;CC=US:;;12345 Elm St;Reston;VA;20190;USA

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"addresses": {
  "ADDR-1" : {
    "@type": "Address",
    "contexts": { "work": true },
    "fullAddress": "54321 Oak St\nReston\nVA\n20190\nUSA",
    "street": [
       { "@type": "StreetComponent", "type": "name", "value": "Oak St" },
       { "@type": "StreetComponent", "type": "number", "value": "54321" }
    ],
    "locality": "Reston",
    "region": "VA",
    "country": "USA",
    "postcode": "20190",
    "countryCode": "US"
  },
  "ADDR-2": {
    "@type": "Address",
    "contexts": { "private": true },
    "fullAddress":  "12345 Elm St\nReston\nVA\n20190\nUSA",
    "street": [
       { "@type": "StreetComponent", "type": "name", "value": "Elm St" },
       { "@type": "StreetComponent", "type": "number", "value": "12345" }
    ],
    "locality": "Reston",
    "region": "VA",
    "country": "USA",
    "postcode": "20190",
    "countryCode": "US"
  }
}

                  Figure 13: ADR conversion example

2.8.  Communications Properties

2.8.1.  CONTACT-CHANNEL-PREF

   A CONTACT-CHANNEL-PREF property converts to an entry in the
   preferredContactChannels property (Figure 14).  The entry key set is
   defined in Table 4, the related entry values are arrays of
   ContactChannelPreference objects.

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      +============================+================================+
      | CONTACT-CHANNEL-PREF value | "preferredContactChannels" key |
      +============================+================================+
      | ADR                        | addresses                      |
      +----------------------------+--------------------------------+
      | EMAIL                      | emails                         |
      +----------------------------+--------------------------------+
      | IMPP                       | onlineServices                 |
      +----------------------------+--------------------------------+
      | TEL                        | phones                         |
      +----------------------------+--------------------------------+

              Table 4: CONTACT-CHANNEL-PREF values conversion

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   If both PREF and TYPE parameters are missing, the array of
   ContactChannelPreference objects MUST be empty.

   CONTACT-CHANNEL-PREF;PREF=1:EMAIL
   CONTACT-CHANNEL-PREF;PREF=2:TEL
   "preferredContactChannels": {
     "emails":[
       {
         "@type": "ContactChannelPreference",
         "pref": 1
       }
     ],
     "phones":[
       {
         "@type": "ContactChannelPreference",
         "pref": 2
       }
     ]
   }

                     Figure 14: LANG conversion example

   Note: This property is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.8.2.  EMAIL

   An EMAIL property converts to an entry in the emails property
   (Figure 15).  The entry value is an EmailAddress object.  The address
   property is set to the EMAIL value.

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   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   EMAIL;TYPE=work:jqpublic@xyz.example.com
   EMAIL;PREF=1:jane_doe@example.com
   "emails": {
     "EMAIL-1": {
       "@type": "EmailAddress",
       "contexts": { "work": true },
       "address": "jqpublic@xyz.example.com"
     },
     "EMAIL-2": {
       "@type": "EmailAddress",
       "address": "jane_doe@example.com",
       "pref": 1
     }
   }

                    Figure 15: EMAIL conversion example

2.8.3.  IMPP

   An IMPP property converts to an entry in the onlineServices property
   (Figure 16).  The type of the OnlineService is set to impp.  The
   entry value is a OnlineService object and the user property is set to
   the IMPP value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   IMPP;PREF=1:xmpp:alice@example.com
   "onlineServices": {
     "OS-1": {
       "@type": "OnlineService",
       "user": "xmpp:alice@example.com",
       "type": "impp",
       "pref": 1
     },
   }

                     Figure 16: IMPP conversion example

2.8.4.  LANG

   A LANG property converts to an entry in the preferredLanguages
   property (Figure 17).  The entry keys correspond to the language
   tags, the related entry values are arrays of LanguagePreference
   objects.

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   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   If both PREF and TYPE parameters are missing, the array of
   LanguagePreference objects MUST be empty.

   LANG;TYPE=work;PREF=1:en
   LANG;TYPE=work;PREF=2:fr
   LANG;TYPE=home:fr
   "preferredLanguages": {
     "en":[
       {
         "@type": "LanguagePreference",
         "contexts": { "work": true },
         "pref": 1
       }
     ],
     "fr":[
       {
         "@type": "LanguagePreference",
         "contexts": { "work": true },
         "pref": 2
       },
       {
         "@type": "LanguagePreference",
         "contexts": { "private": true }
       }
     ]
   }

                     Figure 17: LANG conversion example

2.8.5.  LOCALE

   The LOCALE property converts to the locale property (Figure 18).

   LOCALE:de-AT
   "locale": "de-AT"

                    Figure 18: LOCALE conversion example

   Note: This property is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

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2.8.6.  SOCIALPROFILE

   A SOCIALPROFILE property converts to an entry in the onlineServices
   property (Figure 19).  If the value type of the SOCIALPROFILE is
   TEXT, then the type of the OnlineService is set to username.
   Otherwise, the type is set to uri.  The entry value is a
   OnlineService object and the user property is set to the property
   value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   SOCIALPROFILE;SERVICE-TYPE=Twitter:https://twitter.com/ietf
   "onlineServices": {
     ...
     "OS-1": {
       "@type": "OnlineService",
       "service": "Twitter",
       "user": "https://twitter.com/ietf",
       "type": "uri"
     }
   }

                     Figure 19: IMPP conversion example

   Note: This property is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.8.7.  TEL

   A TEL property converts to an entry in the phones property
   (Figure 20).  The entry value is a Phone object.  The TEL-specific
   values of the TYPE parameter convert to the features property keys.
   The number property is set to the TEL value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   TEL;VALUE=uri;PREF=1;TYPE="voice,home":tel:+1-555-555-5555;ext=5555
   TEL;VALUE=uri;TYPE=home:tel:+33-01-23-45-67

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   "phones": {
     "PHONE-1": {
       "@type": "Phone",
       "contexts": { "private": true },
       "features": { "voice": true },
       "number": "tel:+1-555-555-5555;ext=5555",
       "pref": 1
     },
     "PHONE-2": {
       "@type": "Phone",
       "contexts": { "private": true },
       "number": "tel:+33-01-23-45-67"
     }
   }

                     Figure 20: TEL conversion example

2.9.  Geographical Properties

2.9.1.  GEO

   This converts to the coordinates property of the Address object.
   Also see Section 2.9.3 to determine which Address object instance to
   convert to.

2.9.2.  TZ

   A value of type TEXT converts to the timeZone property in the Address
   object.

   A value of type UTC-OFFSET converts to the timeZone property in the
   Address object if the offset has zero minutes and the hour offset is
   in the range -12 <= 14:

   *  If the hour offset is zero, use the time zone name Etc/UTC.

   *  Otherwise construct the time zone name with ETC/GMT suffixed with
      the string representation of the reversed sign hour offset,
      including the sign but excluding leading zeros and minutes.  For
      example, the UTC offset value -0500 converts to ETC/GMT+5.

   For such property values, also see Section 2.9.3 to determine which
   Address object instance to convert to.

   Any other value of type UTC-OFFSET or URI does not convert to an
   IANA-registered property in JSContact.  To convert such property, see
   Section 2.16.1.

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2.9.3.  Combining geographical properties

   In vCard the properties ADR, GEO and TZ occur independently of each
   other.  In JSContact, they all convert to properties of an Address
   object.  It is implementation-specific if these vCard properties
   convert to _separate_ address instances in JSContact, or if some or
   all of them convert to the _same_ address.  That being said,
   implementations SHOULD convert the properties to the _same_ address
   for the following cases:

   *  The ALTID parameter values of the properties match.

   *  The ALTID parameters are not set, but are set on any other ADR,
      GEO and TZ properties.

2.10.  Organizational Properties

2.10.1.  CONTACT-URI

   A CONTACT-URI property as defined in [RFC8605] is represented as an
   entry of the links property (Figure 21).  The entry value is a
   LinkResource object whose type property is set to contact and uri
   property is set to the CONTACT-URI value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   CONTACT-URI;PREF=1:mailto:contact@example.com
   "links": {
     "CONTACT-1": {
       "@type": "LinkResource",
       "type": "contact",
       "uri": "mailto:contact@example.com",
       "pref": 1
     }
   }

                 Figure 21: CONTACT-URI conversion example

2.10.2.  LOGO

   A LOGO property converts to an entry in the media property
   (Figure 22).  The entry value is a MediaResource object whose type
   property is set to logo and uri property is set to the LOGO value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

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   LOGO:http://www.example.com/pub/logos/abccorp.jpg
   "media": {
     "LOGO-1": {
       "@type": "MediaResource",
       "type": "logo",
       "uri": "http://www.example.com/pub/logos/abccorp.jpg"
     }
   }

                     Figure 22: LOGO conversion example

2.10.3.  MEMBER

   The uids of the contact cards composing the group are included in the
   members property (Figure 23).

   In this case, the PREF parameter does not have a JSContact
   counterpart; however, the implementers MAY insert the map entries by
   order of preference.

   KIND:group
   FN:The Doe family
   MEMBER:urn:uuid:03a0e51f-d1aa-4385-8a53-e29025acd8af
   MEMBER:urn:uuid:b8767877-b4a1-4c70-9acc-505d3819e519
   "kind": "group",
   "fullName": "The Doe family",
   "uid": "urn:uuid:ab4310aa-fa43-11e9-8f0b-362b9e155667",
   "members": {
     "urn:uuid:03a0e51f-d1aa-4385-8a53-e29025acd8af": true,
     "urn:uuid:b8767877-b4a1-4c70-9acc-505d3819e519": true
   }

                          Figure 23: Group example

2.10.4.  ORG

   An ORG property converts to an entry in the organizations property
   (Figure 24).  The entry value is an Organization object whose name
   property contains the organizational name, and the units property is
   an array of OrgUnit objects each containing the organizational unit
   name in the name property.

   Implementations MAY allow representation of organizational units
   without the organizational name.  In this case, the first component
   of the ORG value MUST be an empty string (e.g.  ORG:;DepartmentA).

   The ALTID, LANGUAGE parameters convert according to the rules as
   defined in Section 2.3.

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   The first item of the comma-separated SORT-AS parameter value
   converts to the sortAs property of the Organization object.  The
   subsequent items convert to the sortAs property of the corresponding
   OrgUnit object

   The TYPE parameter converts according to the rules as defined in
   Section 2.3.

   ORG;SORT-AS="ABC":ABC\, Inc.;North American Division;Marketing
   "organizations": {
     "ORG-1": {
       "@type": "Organization",
       "name": "ABC, Inc.",
       "units":[
         {"@type": "OrgUnit", "name": "North American Division"},
         {"@type": "OrgUnit", "name": "Marketing"}
       ],
       "sortAs": "ABC"
     }
   }

                     Figure 24: ORG conversion example

2.10.5.  RELATED

   This converts to an entry in the relatedTo property (Figure 25).  The
   property value converts to the key in the relatedTo property.  The
   TYPE parameters convert to the relation of the Relation object value.
   Any other parameters convert as defined in Section 2.16.2.

RELATED;TYPE=friend:urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6
RELATED;TYPE=contact:http://example.com/directory/jdoe.vcf
RELATED;VALUE=text:Please contact my assistant Jane Doe for any inquiries.

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"relatedTo" : {
  "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6" : {
    "@type" : "Relation",
    "relation" : {
      "friend" : true
    }
  },
  "http://example.com/directory/jdoe.vcf" : {
    "@type" : "Relation",
    "relation" : {
      "contact" : true
    }
  },
  "Please contact my assistant Jane Doe for any inquiries." : {
    "@type" : "Relation",
    "relation" : { }
  }
}

                Figure 25: RELATED conversion example

2.10.6.  TITLE and ROLE

   Both TITLE and ROLE properties are represented as entries of the
   titles property (Figure 26).  The entry value is a Title object whose
   type property is set to title or role for TITLE and ROLE vCard
   properties, respectively.  The name property is set to the vCard
   property value.

   The value of the organization property can be derived if the TITLE or
   ROLE property is member of a vCard property group and exactly one
   other ORG property also is part of that group.

   The ALTID and LANGUAGE parameters convert according to the rules as
   defined in Section 2.3.

   TITLE:Research Scientist
   group1.ROLE:Project Leader
   group1.ORG:ABC, Inc.

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   "titles": {
     "TITLE-1": {
       "@type": "Title",
       "type": "title",
       "name": "Project Leader"
     },
     "TITLE-2": {
       "@type": "Title",
       "type": "role",
       "name": "Research Scientist",
       "organization": "ORG-1"
     }
   },
   "organizations": {
     "ORG-1": {
       "@type": "Organization",
       "name": "ABC, Inc."
     }
   }

                Figure 26: TITLE and ROLE conversion example

2.11.  Personal Information Properties

2.11.1.  EXPERTISE

   An EXPERTISE property as defined in [RFC6715] is represented as a
   PersonalInfo object in the personalInfo property (Figure 27).  The
   type property is set to "expertise".

   The INDEX parameter converts according to the rules as defined in
   Section 2.3.

   EXPERTISE;LEVEL=beginner;INDEX=2:chinese literature
   EXPERTISE;INDEX=1;LEVEL=expert:chemistry

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   "personalInfo": {
     "PERSINFO-1" : {
       "@type": "PersonalInfo",
       "type": "expertise",
       "value": "chinese literature",
        "level": "low",
        "position": 2
     },
     "PERSINFO-2" : {
       "@type": "PersonalInfo",
       "type": "expertise",
       "value": "chemistry",
       "level": "high",
       "position": 1
     }
   }

                  Figure 27: EXPERTISE conversion example

2.11.2.  HOBBY

   A HOBBY property as defined in [RFC6715] is represented as a
   PersonalInfo object in the personalInfo property (Figure 28).  The
   type property is set to "hobby".

   The INDEX parameter converts according to the rules as defined in
   Section 2.3.

   HOBBY;INDEX=1;LEVEL=high:reading
   HOBBY;INDEX=2;LEVEL=high:sewing
   "personalInfo": {
     "PERSINFO-1" : {
       "@type": "PersonalInfo",
       "type": "hobby",
       "value": "reading",
       "level": "high",
       "position": 1
     },
     "PERSINFO-2" : {
       "@type": "PersonalInfo",
       "type": "hobby",
       "value": "sewing",
       "level": "high",
       "position": 2
     }
   }

                    Figure 28: HOBBY conversion example

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2.11.3.  INTEREST

   An INTEREST property as defined in [RFC6715] is represented as a
   PersonalInfo object in the personalInfo property (Figure 29).  The
   type property is set to "interest".

   The INDEX parameter converts according to the rules as defined in
   Section 2.3.

   INTEREST;INDEX=1;LEVEL=medium:r&b music
   INTEREST;INDEX=2;LEVEL=high:rock ’n’ roll music
   "personalInfo": {
     "PERSINFO-1" : {
       "@type": "PersonalInfo",
       "type": "interest",
       "value": "r&b music",
       "level": "medium",
       "position": 1
     },
     "PERSINFO-2" : {
       "@type": "PersonalInfo",
       "type": "interest",
       "value": "rock ’n’ roll music",
       "level": "high",
       "position": 2
     }
   }

                   Figure 29: INTEREST conversion example

2.11.4.  ORG-DIRECTORY

   An ORG-DIRECTORY property as defined in [RFC6715] is represented as
   an entry of the directories property (Figure 30).  The entry value is
   a DirectoryResource object whose type property is set to directory
   and uri property is set to the ORG-DIRECTORY value.

   The INDEX, PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

  ORG-DIRECTORY;INDEX=1:http://directory.mycompany.example.com
  ORG-DIRECTORY;PREF=1:ldap://ldap.tech.example/o=Example%20Tech,ou=Engineering

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  "directories": {
    "DIRECTORY-1": {
      "@type": "DirectoryResource",
      "type": "directory",
      "uri": "http://directory.mycompany.example.com",
      "position": 1
    },
    "DIRECTORY-2": {
      "@type": "DirectoryResource",
      "type": "directory",
      "uri": "ldap://ldap.tech.example/o=Example%20Tech,ou=Engineering",
      "pref": 1
    }
  }

               Figure 30: ORG-DIRECTORY conversion example

2.12.  Explanatory Properties

2.12.1.  CATEGORIES

   A CATEGORIES property converts to a set of entries of the keywords
   property (Figure 31).  The keys are the comma-separated text values
   of the CATEGORIES property.

   In this case, the PREF parameter does not have a JSContact
   counterpart; however, the implementers MAY insert the map entries by
   order of preference.

   CATEGORIES:internet,IETF,Industry,Information Technology
   "keywords": {
     "internet": true,
     "IETF": true,
     "Industry": true,
     "Information Technology": true
   }

                  Figure 31: CATEGORIES conversion example

2.12.2.  CLIENTPIDMAP and PID Parameter

   The CLIENTPIDMAP property and the PDI parameter don't have a direct
   match with a Card feature.

2.12.3.  CREATED

   The CREATED property converts to the created property (Figure 32).

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   CREATED:19940930T143510Z
   "created": "1994-09-30T14:35:10Z"

                   Figure 32: CREATED conversion example

   Note: This property is defined in
   [I-D.ietf-calext-vcard-jscontact-extensions].

2.12.4.  NOTE

   A NOTE property converts to a Note object in the notes map
   (Figure 33)

   The ALTID and LANGUAGE parameters convert according to the rules as
   defined in Section 2.3.

   NOTE;CREATED=20221123T150132Z;AUTHOR-NAME="John":
     Office hours are from 0800 to 1715 EST\, Mon-Fri.
   "notes": {
       "NOTE-1" : {
          "note": "Office hours are from 0800 to 1715 EST, Mon-Fri.",
          "created": "2022-11-23T15:01:32Z",
          "author": {
            "@type": "Author",
            "name": "John"
          }
       }
   }

                     Figure 33: NOTE conversion example

2.12.5.  PRODID

   The PRODID property converts to the prodId property (Figure 34).

   PRODID:-//ONLINE DIRECTORY//NONSGML Version 1//EN
   "prodId": "-//ONLINE DIRECTORY//NONSGML Version 1//EN"

                    Figure 34: PRODID conversion example

2.12.6.  REV

   The REV property converts to the updated property (Figure 35).

   REV:19951031T222710Z
   "updated": "1995-10-31T22:27:10Z"

                     Figure 35: REV conversion example

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2.12.7.  SOUND

   A SOUND property converts to an entry in the media property
   (Figure 36).  The entry value is a MediaResource object whose type
   property is set to sound and uri property is set to the SOUND value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

  SOUND:CID:JOHNQPUBLIC.part8.19960229T080000.xyzMail@example.com
  "media": {
    ...
    "SOUND-1": {
      "@type": "MediaResource",
      "type": "sound",
      "uri": "CID:JOHNQPUBLIC.part8.19960229T080000.xyzMail@example.com"
    }
  }

                   Figure 36: SOUND conversion example

2.12.8.  UID

   The UID property corresponds to the uid property (Figure 37).

   UID:urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6
   "uid": "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

                     Figure 37: UID conversion example

2.12.9.  URL

   An URL property converts to an entry in the links property
   (Figure 38).  The entry value is a LinkResource object whose uri
   property is set to the URL value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   URL:http://example.org/restaurant.french/~chezchic.html
   "links": {
     "LINK-1": {
       "@type": "LinkResource",
       "uri": "http://example.org/restaurant.french/~chezchic.html"
     }
   }

                     Figure 38: URL conversion example

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2.12.10.  VERSION

   The VERSION property doesn't have a direct match with a JSContact
   feature.

2.12.11.  X-ABLabel

   This property is experimental but widely in use in existing vCard
   data.  It converts to the label property of a JSContact object type.
   The X-ABLabel property is preceded by a vCard property group name,
   and the label converts to the JSContact object which got converted
   from a vCard property having the same group.

   The group name is not preserved, implementations are free to choose
   any unique group name when converting back to vCard.  For an example
   how to preserve the group name see Section 2.3.8.

   item1.TEL;VALUE=uri:tel:+1-555-555-5555
   item1.X-ABLabel:foo
   "phones": {
     "p1": {
       "@type": "Phone",
       "number": "tel:+1-555-555-5555",
       "label": "foo"
     }
   }

                  Figure 39: X-ABLabel conversion example

2.13.  Security Properties

2.13.1.  KEY

   A KEY property converts to an entry in the cryptoKeys property
   (Figure 40).  The entry value is a CryptoResource object whose uri
   property is set to the KEY value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   KEY:http://www.example.com/keys/jdoe.cer
   "cryptoKeys": {
     "KEY-1": {
       "@type": "CryptoResource",
       "uri": "http://www.example.com/keys/jdoe.cer"
     }
   }

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                     Figure 40: KEY conversion example

2.14.  Calendar Properties

2.14.1.  CALADRURI

   A CALADRURI property converts to an entry in the schedulingAddresses
   property (Figure 41).  The entry value is a SchedulingAddress object
   whose uri property is set to the CALADRURI value.

   The PREF parameter converts according to the rules as defined in
   Section 2.3.

   CALADRURI;PREF=1:mailto:janedoe@example.com
   CALADRURI:http://example.com/calendar/jdoe
   "schedulingAddresses": {
     "SCHEDULING-1": {
       "@type": "SchedulingAddress",
       "uri": "mailto:janedoe@example.com",
       "pref": 1
     },
     "SCHEDULING-2": {
       "@type": "SchedulingAddress",
       "uri": "http://example.com/calendar/jdoe"
     }
   }

                  Figure 41: CALADRURI conversion example

2.14.2.  CALURI

   A CALURI property converts to an entry in the calendars property
   (Figure 42).  The entry value is a CalendarResource object whose type
   property is set to calendar and uri property is set to the CALURI
   value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   CALURI;PREF=1:http://cal.example.com/calA
   CALURI;MEDIATYPE=text/calendar:ftp://ftp.example.com/calA.ics

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   "calendars": {
     "CAL-1": {
       "@type": "CalendarResource",
       "type": "calendar",
       "uri": "http://cal.example.com/calA",
       "pref": 1
     },
     "CAL-2": {
       "@type": "CalendarResource",
       "type": "calendar",
       "uri": "ftp://ftp.example.com/calA.ics",
       "mediaType": "text/calendar"
     }
   }

                    Figure 42: CALURI conversion example

2.14.3.  FBURL

   An FBURL property converts to an entry in the calendars property
   (Figure 43).  The entry value is a CalendarResource object whose type
   property is set to freeBusy and uri property is set to the FBURL
   value.

   The PREF and TYPE parameters convert according to the rules as
   defined in Section 2.3.

   FBURL;PREF=1:http://www.example.com/busy/janedoe
   FBURL;MEDIATYPE=text/calendar:ftp://example.com/busy/project-a.ifb
   "calendars": {
     "FBURL-1": {
       "@type": "CalendarResource",
       "type": "freeBusy",
       "uri": "http://www.example.com/busy/janedoe",
       "pref": 1
     },
     "FBURL-2": {
       "@type": "CalendarResource",
       "type": "freeBusy",
       "uri": "ftp://example.com/busy/project-a.ifb",
       "mediaType": "text/calendar"
     }
   }

                    Figure 43: FBURL conversion example

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2.15.  Extended Properties and Parameters

   These convert as specified in Section 2.16.

2.16.  New JSContact properties

   vCards may contain properties or parameters for which no IANA-
   registered JSContact property is defined.  For example, a vCard may
   contain extended properties and parameters of which the semantics or
   purposes are unknown Section 6.10 of [RFC6350].

   This section defines JSContact extension properties by which such
   vCard properties and parameters MAY be represented in JSContact.
   Implementations MAY choose to convert differently if they deem that
   more appropriate.

2.16.1.  Property vCardProps

   Name:  vCardProps

   Type:  JCardProp[], where JCardProp denotes a jCard-encoded vCard
      property as defined in Section 3.3 of [RFC7095].

   Definition:  This property is set on a JSContact object that
      represents a vCard.  It contains properties that are set in the
      vCard represented by this JSContact object.  Each entry in this
      list typically represents a vCard property for which no conversion
      to an IANA-registered JSContact property is defined.  It MAY
      contain vCard IANA-registered properties which also got converted
      to an IANA-registered property in the same JSContact object.  In
      case of conflict, the values of the JSContact property MUST be
      used.

   Example:  This illustrates how to convert a vCard extension property:

      item1.X-FOO;X-BAR=Hello:World!
      "vCardProps": [
        ["x-foo", {
          "x-bar": "Hello",
          "group": "item1"
        }, "unknown", "World!"]
      ]

                      Figure 44: JSContact props example

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2.16.2.  Property vCardParams

   Name:  vCardParams

   Type:  String[String|String[]]

   Definition:  This property is set on a JSContact object that
      represents a vCard property.  Its value MUST be a JSON object
      containing vCard property parameters, defined as array element 2
      in Section 3.3 of [RFC7095].  Each entry represents a parameter of
      the vCard property that converts to the JSContact object.
      Typically, these are parameters for which no IANA-registered
      property is defined in the JSContact object.  It MAY contain vCard
      IANA-registered parameters which also got converted to an IANA-
      registered property in the same JSContact object.  In case of
      conflict, the values of the JSContact property MUST be used.

   Example:  This illustrates how to convert a vCard extension
      parameter:

      EMAIL;X-FOO=Bar:jane_doe@example.com
      "emails": {
        "email1": {
          "@type": "EmailAddress",
          "address": "jane_doe@example.com",
          "vCardParams": {
            "x-foo": "Bar"
          }
        }
      }

                   Figure 45: JSContact vCardParams example

3.  Converting JSContact to vCard

3.1.  Conversion Rules

   A Card converts to vCard by applying the reverse rules of converting
   vCard to JSContact.  Table 5 lists the relevant document sections for
   each JSContact object type and property.  The following additional
   rules apply:

   *  Multi-valued JSContact properties convert to separate instances of
      their equivalent vCard property, and for each the PROP-ID
      parameter MUST be set to the Id of the converted value (see
      Section 2.3.15).

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   *  The fullName property in JSContact is optional, but it is
      mandatory in vCard.  If the fullName is not set but the name
      property is, then implementations MAY derive the value of the FN
      property from it.  In this case, they MUST set the DERIVED
      parameter on the FN property.  Otherwise, they MUST set the FN
      property with an empty value.

   *  Vendor-extension and unknown properties convert to vCard as
      outlined in section Section 3.2.

   +==========================+==========================+============+
   | JSContact Type           | Property Name            | Relevant   |
   |                          |                          | Section(s) |
   +==========================+==========================+============+
   | Address                  | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Address                  | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | Address                  | coordinates              | Section    |
   |                          |                          | 2.3.7,     |
   |                          |                          | Section    |
   |                          |                          | 2.9.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | country                  | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | countryCode              | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | fullAddress              | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | locality                 | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | postcode                 | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | Address                  | region                   | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Address                  | street                   | Section    |
   |                          |                          | 2.7.1      |

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   +--------------------------+--------------------------+------------+
   | Address                  | timeZone                 | Section    |
   |                          |                          | 2.3.20,    |
   |                          |                          | Section    |
   |                          |                          | 2.9.2      |
   +--------------------------+--------------------------+------------+
   | Anniversary              | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Anniversary              | date                     | Section    |
   |                          |                          | 2.6.1      |
   +--------------------------+--------------------------+------------+
   | Anniversary              | place                    | Section    |
   |                          |                          | 2.6.1      |
   +--------------------------+--------------------------+------------+
   | Anniversary              | type                     | Section    |
   |                          |                          | 2.6.1      |
   +--------------------------+--------------------------+------------+
   | Author                   | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Author                   | name                     | Section    |
   |                          |                          | 2.3.3      |
   +--------------------------+--------------------------+------------+
   | Author                   | uri                      | Section    |
   |                          |                          | 2.3.2      |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | mediaType                | Section    |
   |                          |                          | 2.3.12     |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | type                     | Section    |
   |                          |                          | 2.14.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.14.3     |
   +--------------------------+--------------------------+------------+
   | CalendarResource         | uri                      | Section    |

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   |                          |                          | 2.14.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.14.3     |
   +--------------------------+--------------------------+------------+
   | Card                     | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Card                     | @version                 | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Card                     | addresses                | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Card                     | anniversaries            | Section    |
   |                          |                          | 2.6.1      |
   +--------------------------+--------------------------+------------+
   | Card                     | calendars                | Section    |
   |                          |                          | 2.14.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.14.3     |
   +--------------------------+--------------------------+------------+
   | Card                     | created                  | Section    |
   |                          |                          | 2.12.3     |
   +--------------------------+--------------------------+------------+
   | Card                     | directories              | Section    |
   |                          |                          | 2.5.3,     |
   |                          |                          | Section    |
   |                          |                          | 2.11.4     |
   +--------------------------+--------------------------+------------+
   | Card                     | emails                   | Section    |
   |                          |                          | 2.8.2      |
   +--------------------------+--------------------------+------------+
   | Card                     | fullName                 | Section    |
   |                          |                          | 2.6.4      |
   +--------------------------+--------------------------+------------+
   | Card                     | keywords                 | Section    |
   |                          |                          | 2.12.1     |
   +--------------------------+--------------------------+------------+
   | Card                     | kind                     | Section    |
   |                          |                          | 2.5.2      |
   +--------------------------+--------------------------+------------+
   | Card                     | links                    | Section    |
   |                          |                          | 2.10.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.12.9     |
   +--------------------------+--------------------------+------------+
   | Card                     | locale                   | Section    |
   |                          |                          | 2.8.5      |

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   +--------------------------+--------------------------+------------+
   | Card                     | localizations            | Section    |
   |                          |                          | 2.3.10     |
   +--------------------------+--------------------------+------------+
   | Card                     | media                    | Section    |
   |                          |                          | 2.6.6,     |
   |                          |                          | Section    |
   |                          |                          | 2.10.2,    |
   |                          |                          | Section    |
   |                          |                          | 2.12.7     |
   +--------------------------+--------------------------+------------+
   | Card                     | members                  | Section    |
   |                          |                          | 2.10.3     |
   +--------------------------+--------------------------+------------+
   | Card                     | name                     | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | Card                     | nickNames                | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | Card                     | notes                    | Section    |
   |                          |                          | 2.12.4     |
   +--------------------------+--------------------------+------------+
   | Card                     | onlineServices           | Section    |
   |                          |                          | 2.8.3      |
   +--------------------------+--------------------------+------------+
   | Card                     | organizations            | Section    |
   |                          |                          | 2.10.4     |
   +--------------------------+--------------------------+------------+
   | Card                     | personalInfo             | Section    |
   |                          |                          | 2.11.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.11.2,    |
   |                          |                          | Section    |
   |                          |                          | 2.11.3     |
   +--------------------------+--------------------------+------------+
   | Card                     | phones                   | Section    |
   |                          |                          | 2.8.7      |
   +--------------------------+--------------------------+------------+
   | Card                     | preferredContactChannels | Section    |
   |                          |                          | 2.8.1      |
   +--------------------------+--------------------------+------------+
   | Card                     | preferredLanguages       | Section    |
   |                          |                          | 2.8.4      |
   +--------------------------+--------------------------+------------+
   | Card                     | prodId                   | Section    |
   |                          |                          | 2.12.5     |
   +--------------------------+--------------------------+------------+

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   | Card                     | relatedTo                | Section    |
   |                          |                          | 2.10.5     |
   +--------------------------+--------------------------+------------+
   | Card                     | schedulingAddresses      | Section    |
   |                          |                          | 2.14.1     |
   +--------------------------+--------------------------+------------+
   | Card                     | speakToAs                | Section    |
   |                          |                          | 2.6.3      |
   +--------------------------+--------------------------+------------+
   | Card                     | titles                   | Section    |
   |                          |                          | 2.10.6     |
   +--------------------------+--------------------------+------------+
   | Card                     | uid                      | Section    |
   |                          |                          | 2.12.8     |
   +--------------------------+--------------------------+------------+
   | Card                     | updated                  | Section    |
   |                          |                          | 2.12.6     |
   +--------------------------+--------------------------+------------+
   | ContactChannelPreference | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | ContactChannelPreference | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | ContactChannelPreference | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | mediaType                | Section    |
   |                          |                          | 2.3.12     |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | type                     | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | CryptoResource           | uri                      | Section    |
   |                          |                          | 2.13.1     |
   +--------------------------+--------------------------+------------+

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   | DirectoryResource        | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | listAs                   | Section    |
   |                          |                          | 2.3.9      |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | mediaType                | Section    |
   |                          |                          | 2.3.12     |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | type                     | Section    |
   |                          |                          | 2.5.3,     |
   |                          |                          | Section    |
   |                          |                          | 2.11.4     |
   +--------------------------+--------------------------+------------+
   | DirectoryResource        | uri                      | Section    |
   |                          |                          | 2.5.3,     |
   |                          |                          | Section    |
   |                          |                          | 2.11.4     |
   +--------------------------+--------------------------+------------+
   | EmailAddress             | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | EmailAddress             | address                  | Section    |
   |                          |                          | 2.8.2      |
   +--------------------------+--------------------------+------------+
   | EmailAddress             | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | EmailAddress             | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | EmailAddress             | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | LanguagePreference       | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | LanguagePreference       | contexts                 | Section    |
   |                          |                          | 2.3.19     |

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   +--------------------------+--------------------------+------------+
   | LanguagePreference       | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | LinkResource             | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | LinkResource             | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | LinkResource             | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | LinkResource             | mediaType                | Section    |
   |                          |                          | 2.3.12     |
   +--------------------------+--------------------------+------------+
   | LinkResource             | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | LinkResource             | type                     | Section    |
   |                          |                          | 2.10.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.12.9     |
   +--------------------------+--------------------------+------------+
   | LinkResource             | uri                      | Section    |
   |                          |                          | 2.10.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.12.9>    |
   +--------------------------+--------------------------+------------+
   | MediaResource            | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | MediaResource            | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | MediaResource            | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | MediaResource            | mediaType                | Section    |
   |                          |                          | 2.3.12     |
   +--------------------------+--------------------------+------------+
   | MediaResource            | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | MediaResource            | type                     | Section    |
   |                          |                          | 2.6.6,     |
   |                          |                          | Section    |
   |                          |                          | 2.10.2,    |

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   |                          |                          | Section    |
   |                          |                          | 2.12.7     |
   +--------------------------+--------------------------+------------+
   | MediaResource            | uri                      | Section    |
   |                          |                          | 2.6.6,     |
   |                          |                          | Section    |
   |                          |                          | 2.10.2,    |
   |                          |                          | Section    |
   |                          |                          | 2.12.7     |
   +--------------------------+--------------------------+------------+
   | Name                     | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Name                     | components               | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | Name                     | sortAs                   | Section    |
   |                          |                          | 2.3.18     |
   +--------------------------+--------------------------+------------+
   | NameComponent            | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | NameComponent            | rank                     | Section    |
   |                          |                          | 2.3.16     |
   +--------------------------+--------------------------+------------+
   | NameComponent            | type                     | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | NameComponent            | value                    | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | NickName                 | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | NickName                 | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | NickName                 | name                     | Section    |
   |                          |                          | 2.6.5      |
   +--------------------------+--------------------------+------------+
   | NickName                 | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | Note                     | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Note                     | author                   | Section    |
   |                          |                          | 2.3.2,     |

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   |                          |                          | Section    |
   |                          |                          | 2.3.3      |
   +--------------------------+--------------------------+------------+
   | Note                     | created                  | Section    |
   |                          |                          | 2.3.5      |
   +--------------------------+--------------------------+------------+
   | Note                     | note                     | Section    |
   |                          |                          | 2.12.4     |
   +--------------------------+--------------------------+------------+
   | OnlineService            | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | OnlineService            | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | OnlineService            | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | OnlineService            | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | OnlineService            | service                  | Section    |
   |                          |                          | 2.3.17     |
   +--------------------------+--------------------------+------------+
   | OnlineService            | type                     | Section    |
   |                          |                          | 2.8.3,     |
   |                          |                          | Section    |
   |                          |                          | 2.8.6      |
   +--------------------------+--------------------------+------------+
   | OnlineService            | user                     | Section    |
   |                          |                          | 2.8.3,     |
   |                          |                          | Section    |
   |                          |                          | 2.8.6      |
   +--------------------------+--------------------------+------------+
   | OrgUnit                  | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | OrgUnit                  | name                     | Section    |
   |                          |                          | 2.10.4     |
   +--------------------------+--------------------------+------------+
   | OrgUnit                  | sortAs                   | Section    |
   |                          |                          | 2.3.18     |
   +--------------------------+--------------------------+------------+
   | Organization             | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Organization             | contexts                 | Section    |
   |                          |                          | 2.3.19     |

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   +--------------------------+--------------------------+------------+
   | Organization             | name                     | Section    |
   |                          |                          | 2.10.4     |
   +--------------------------+--------------------------+------------+
   | Organization             | sortAs                   | Section    |
   |                          |                          | 2.3.18     |
   +--------------------------+--------------------------+------------+
   | Organization             | units                    | Section    |
   |                          |                          | 2.10.4     |
   +--------------------------+--------------------------+------------+
   | PartialDate              | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | PartialDate              | calendarScale            | Section    |
   |                          |                          | 2.3.4      |
   +--------------------------+--------------------------+------------+
   | PartialDate              | day                      | Section    |
   |                          |                          | 2.2.2      |
   +--------------------------+--------------------------+------------+
   | PartialDate              | month                    | Section    |
   |                          |                          | 2.2.2      |
   +--------------------------+--------------------------+------------+
   | PartialDate              | year                     | Section    |
   |                          |                          | 2.2.2      |
   +--------------------------+--------------------------+------------+
   | PatchObject              | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | PersonalInfo             | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | PersonalInfo             | listAs                   | Section    |
   |                          |                          | 2.3.9      |
   +--------------------------+--------------------------+------------+
   | PersonalInfo             | level                    | Section    |
   |                          |                          | 2.3.11     |
   +--------------------------+--------------------------+------------+
   | PersonalInfo             | type                     | Section    |
   |                          |                          | 2.11.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.11.2,    |
   |                          |                          | Section    |
   |                          |                          | 2.11.3     |
   +--------------------------+--------------------------+------------+
   | PersonalInfo             | value                    | Section    |
   |                          |                          | 2.11.1,    |
   |                          |                          | Section    |
   |                          |                          | 2.11.2,    |

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   |                          |                          | Section    |
   |                          |                          | 2.11.3     |
   +--------------------------+--------------------------+------------+
   | Phone                    | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Phone                    | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | Phone                    | features                 | Section    |
   |                          |                          | 2.8.7      |
   +--------------------------+--------------------------+------------+
   | Phone                    | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | Phone                    | number                   | Section    |
   |                          |                          | 2.8.7      |
   +--------------------------+--------------------------+------------+
   | Phone                    | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | Pronouns                 | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Pronouns                 | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+
   | Pronouns                 | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | Pronouns                 | pronouns                 | Section    |
   |                          |                          | 2.6.3      |
   +--------------------------+--------------------------+------------+
   | Relation                 | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Relation                 | relation                 | Section    |
   |                          |                          | 2.10.5     |
   +--------------------------+--------------------------+------------+
   | Resource                 | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | SchedulingAddress        | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | SchedulingAddress        | contexts                 | Section    |
   |                          |                          | 2.3.19     |
   +--------------------------+--------------------------+------------+

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   | SchedulingAddress        | label                    | Section    |
   |                          |                          | 2.12.11    |
   +--------------------------+--------------------------+------------+
   | SchedulingAddress        | pref                     | Section    |
   |                          |                          | 2.3.14     |
   +--------------------------+--------------------------+------------+
   | SchedulingAddress        | uri                      | Section    |
   |                          |                          | 2.14.1     |
   +--------------------------+--------------------------+------------+
   | SpeakToAs                | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | SpeakToAs                | grammaticalGender        | Section    |
   |                          |                          | 2.6.3      |
   +--------------------------+--------------------------+------------+
   | SpeakToAs                | pronouns                 | Section    |
   |                          |                          | 2.6.3      |
   +--------------------------+--------------------------+------------+
   | StreetComponent          | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | StreetComponent          | type                     | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | StreetComponent          | value                    | Section    |
   |                          |                          | 2.7.1      |
   +--------------------------+--------------------------+------------+
   | Timestamp                | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Timestamp                | utc                      | Section    |
   |                          |                          | 2.2.2      |
   +--------------------------+--------------------------+------------+
   | Title                    | @type                    | not        |
   |                          |                          | applicable |
   +--------------------------+--------------------------+------------+
   | Title                    | name                     | Section    |
   |                          |                          | 2.10.6     |
   +--------------------------+--------------------------+------------+
   | Title                    | organization             | Section    |
   |                          |                          | 2.10.6     |
   +--------------------------+--------------------------+------------+
   | Title                    | type                     | Section    |
   |                          |                          | 2.10.6     |
   +--------------------------+--------------------------+------------+

             Table 5: Conversion rules by JSContact property

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3.2.  New vCard Properties and Parameters

   JSContact object types may contain properties for which no IANA-
   registered vCard property is defined.  For example, a JSContact
   object may contain vendor-specific properties of which the semantics
   or purpose are unknown.

   This section defines new vCard properties and parameters by which
   such JSContact properties MAY be represented in JSContact.
   Implementations MAY choose to convert differently if they deem that
   more appropriate.

3.2.1.  Property JSCONTACT-PROP

Property name:  JSCONTACT-PROP

Purpose:  This property represents a JSContact property in vCard.

Value type:  TEXT, also see Format Definition for value restrictions.

Conformance:  The property can be specified multiple times in a
   vCard.

Property parameters:  The JSPTR parameter MUST be set exactly once
   for this property.  The VALUE parameter MAY be set once, in which
   case its value MUST be URI.  Other IANA-registered and
   experimental property parameters can be specified on this
   property.

Description:  This property converts a JSContact property to vCard.
   The vCard property value is the JSON-encoded value of the
   JSContact property, represented as a TEXT value.  The format of
   the JSON value SHOULD be compact, e.g.  without insignificant
   whitespace.

   The value of the JSPTR parameter defines the path to that
   JSContact value within the Card.  The last segment of the JSON
   pointer either defines the property name or array position of the
   JSContact value.  The root of the JSON pointer always is the Card
   object that this vCard converts to, irrespective if the JSON
   pointer starts with the SOLIDUS (U+002F) character.  If any but
   the last segment of the JSON pointer points to a non-existent
   JSContact property or array entry in the Card, then the JSCONTACT-
   PROP property MUST be ignored and SHOULD be discarded from the
   vCard.

Format definition:  This property is defined by the following
   notation:

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   jscontact-prop = "JSCONTACT-PROP" jscontact-prop-param ":" TEXT CRLF

   jscontact-prop-param  = *(
               ; The following are MANDATORY and MUST NOT
               ; occur more than once
               ( ";" jspath-param ) /    ; see next section
               ( ";" "VALUE" "=" "TEXT")
               ;
               ; The following is OPTIONAL,
               ; and MAY occur more than once.
               ;
               (";" other-param)
               ;
               )

Example(s):  This illustrates how to convert a property at the top-
level in a Card object that is unknown to the implementation.

"someUnknownProperty": true
JSCONTACT-PROP;VALUE=TEXT;JSPTR="someUnknownProperty":true

               Figure 46: Unknown property example

This illustrates how to convert a vendor-extension property at the
top-level of a Card object.  Note the required use of quoted
string for the JSPTR value which allows the path to include the
COLON (U+003A) character.

"example.com:foo": {
  "bar": 1234
}
JSCONTACT-PROP;VALUE=TEXT;JSPTR="example.com:foo":{"bar":1234}

          Figure 47: Vendor-extension conversion example

This illustrates how to convert a vendor-extension property at a
nested level in a Card object using a path relative to the Card
object.  Although not recommended, the property name includes the
SOLIDUS (U+002F) character which requires escaping in the JSON
pointer.

"phones": {
  "phone1": {
   "@type": "Phone",
   "number": "tel:+33-01-23-45-67"
    "example.com:foo/bar": "tux hux"
 }
}

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TEL:tel:+33-01-23-45-67
JSCONTACT-PROP;VALUE=TEXT;JSPTR="phones/phone1/example.com:foo~1bar":"tux hux"

  Figure 48: Nested property example with path relative to Card

3.2.2.  Parameter JSPTR

   Parameter name:  JSPTR

   Purpose:  This parameter contains a JSON pointer [RFC6901] that
      relates its vCard property to some JSON data.  Its exact semantics
      depend on the definition of the property where this parameter is
      set on.

   Description:  This parameter has a single value that MUST be a valid
      JSON pointer as defined in [RFC6901].  Currently, its semantics
      only are defined for the JSCONTACT-PROP property (see
      Section 3.2.1), but it may also be used for other use cases in the
      future.

   Format definition:
      jspath-param  = "JSPTR" "=" DQUOTE *QSAFE-CHAR DQUOTE
                   ; also see param-value in RFC 6350, section 3.3

   Example(s):  This illustrates a simple example.  For further examples
      see Section 3.2.1.

      JSCONTACT-PROP;VALUE=TEXT;JSPTR="example.com:foo":"bar"

4.  Security Considerations

   This specification defines how to convert between the JSContact and
   vCard formats.  The security considerations for parsing and
   formatting such data apply and are outlined in Section 5 of
   [I-D.ietf-calext-jscontact] and Section 9 of [RFC6350].

5.  IANA Considerations

5.1.  New vCard Properties

   IANA is requested to add the following entries to the "vCard
   Properties" registry, defined in Section 10.3.1. of [RFC6350].

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       +===========+================+==============================+
       | Namespace | Property       | Reference                    |
       +===========+================+==============================+
       |           | JSCONTACT-PROP | This document, Section 3.2.1 |
       +-----------+----------------+------------------------------+

                       Table 6: New VCARD Properties

5.2.  New vCard Parameters

   IANA is requested to add the following entries to the "vCard
   Parameters" registry, defined in Section 10.3.2. of [RFC6350].

         +===========+===========+==============================+
         | Namespace | Parameter | Reference                    |
         +===========+===========+==============================+
         |           | JSPTR     | This document, Section 3.2.2 |
         +-----------+-----------+------------------------------+

                      Table 7: New VCARD Parameters

5.3.  New JSContact Properties

   IANA is requested to add the following entries to the "JSContact
   Properties" registry.

   +===========+==============+=========+===========+========+=======+=======+==========+
   |Property   |Property Type |Property |Reference  |Intended|Since  |Until  |Change    |
   |Name       |              |Context  |or         |Usage   |Version|Version|Controller|
   |           |              |         |Description|        |       |       |          |
   +===========+==============+=========+===========+========+=======+=======+==========+
   |vCardParams|String[String]|Any      |Section    |common  |1.0    |       |IETF      |
   |           |              |JSContact|2.16.2     |        |       |       |          |
   |           |              |object   |           |        |       |       |          |
   |           |              |type that|           |        |       |       |          |
   |           |              |contains |           |        |       |       |          |
   |           |              |the @type|           |        |       |       |          |
   |           |              |property.|           |        |       |       |          |
   +-----------+--------------+---------+-----------+--------+-------+-------+----------+
   |vCardProps |JCardProp[]   |Card     |Section    |common  |1.0    |       |IETF      |
   |           |              |         |2.16.1     |        |       |       |          |
   +-----------+--------------+---------+-----------+--------+-------+-------+----------+

      Table 8: Initial Contents of the "JSContact Properties" Registry

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5.4.  New JSContact Types

   IANA is requested to add the following entries to the "JSContact
   Types" registry.

   +===========+==============+==========+=======+=======+============+
   | Type Name | Reference or | Intended |Since  |Until  | Change     |
   |           | Description  | Usage    |Version|Version| Controller |
   +===========+==============+==========+=======+=======+============+
   | JCardProp | Section      | common   |1.0    |       | IETF       |
   |           | 2.16.1       |          |       |       |            |
   +-----------+--------------+----------+-------+-------+------------+

      Table 9: Additional Contents of the "JSContact Types" Registry

6.  Implementation Status

   NOTE: Please remove this section and the reference to RFC 7942 prior
   to publication as an RFC.

   This section records the status of known implementations of the
   protocol as defined in this specification at the time of posting of
   this Internet-Draft, and is based on a proposal described in
   [RFC7942].  The description of implementations in this section is
   intended to assist the IETF in its decision processes in progressing
   drafts to RFCs.  Please note that the listing of any individual
   implementation here does not imply endorsement by the IETF.
   Furthermore, no effort has been spent to verify the information
   presented here that was supplied by IETF contributors.  This is not
   intended as, and must not be construed to be, a catalog of available
   implementations or their features.  Readers are advised to note that
   other implementations may exist.

   According to RFC 7942, "this will allow reviewers and working groups
   to assign due consideration to documents that have the benefit of
   running code, which may serve as evidence of valuable experimentation
   and feedback that have made the implemented protocols more mature.
   It is up to the individual working groups to use this information as
   they see fit".

6.1.  CNR

   *  Responsible Organization: National Research Council (CNR) of Italy
   *  Location: https://github.com/consiglionazionaledellericerche/
      jscontact-tools
   *  Description: This implementation includes tools for JSContact
      creation, validation, serialization/deserialization, and
      conversion from vCard, xCard and jCard.

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   *  Level of Maturity: This is an "alpha" test implementation.
   *  Coverage: This implementation includes all of the features
      described in this specification.
   *  Contact Information: Mario Loffredo, mario.loffredo@iit.cnr.it

7.  References

7.1.  Normative References

   [RFC2119]  Bradner, S. and RFC Publisher, "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>.

   [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>.

   [RFC6473]  Saint-Andre, P., "vCard KIND:application", RFC 6473,
              DOI 10.17487/RFC6473, December 2011,
              <https://www.rfc-editor.org/info/rfc6473>.

   [RFC6474]  Li, K. and B. Leiba, "vCard Format Extensions: Place of
              Birth, Place and Date of Death", RFC 6474,
              DOI 10.17487/RFC6474, December 2011,
              <https://www.rfc-editor.org/info/rfc6474>.

   [RFC6715]  Cauchie, D., Leiba, B., and K. Li, "vCard Format
              Extensions: Representing vCard Extensions Defined by the
              Open Mobile Alliance (OMA) Converged Address Book (CAB)
              Group", RFC 6715, DOI 10.17487/RFC6715, August 2012,
              <https://www.rfc-editor.org/info/rfc6715>.

   [RFC6869]  Salgueiro, G., Clarke, J., and P. Saint-Andre, "vCard
              KIND:device", RFC 6869, DOI 10.17487/RFC6869, February
              2013, <https://www.rfc-editor.org/info/rfc6869>.

   [RFC6901]  Bryan, P., Ed., Zyp, K., and M. Nottingham, Ed.,
              "JavaScript Object Notation (JSON) Pointer", RFC 6901,
              DOI 10.17487/RFC6901, April 2013,
              <https://www.rfc-editor.org/info/rfc6901>.

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   [RFC7095]  Kewisch, P., "jCard: The JSON Format for vCard", RFC 7095,
              DOI 10.17487/RFC7095, January 2014,
              <https://www.rfc-editor.org/info/rfc7095>.

   [RFC7942]  Sheffer, Y. and A. Farrel, "Improving Awareness of Running
              Code: The Implementation Status Section", BCP 205,
              RFC 7942, DOI 10.17487/RFC7942, July 2016,
              <https://www.rfc-editor.org/info/rfc7942>.

7.2.  Informative References

   [I-D.ietf-calext-jscontact]
              Stepanek, R. and M. Loffredo, "JSContact: A JSON
              representation of contact data", Work in Progress,
              Internet-Draft, draft-ietf-calext-jscontact-07, 10 January
              2023, <https://datatracker.ietf.org/doc/html/draft-ietf-
              calext-jscontact-07>.

   [I-D.ietf-calext-vcard-jscontact-extensions]
              Stepanek, R. and M. Loffredo, "vCard Format Extension for
              JSContact", Work in Progress, Internet-Draft, draft-ietf-
              calext-vcard-jscontact-extensions-03, 9 December 2022,
              <https://datatracker.ietf.org/doc/html/draft-ietf-calext-
              vcard-jscontact-extensions-03>.

   [RFC8174]  Leiba, B. and RFC Publisher, "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>.

   [RFC8605]  Hollenbeck, S. and R. Carney, "vCard Format Extensions:
              ICANN Extensions for the Registration Data Access Protocol
              (RDAP)", RFC 8605, DOI 10.17487/RFC8605, May 2019,
              <https://www.rfc-editor.org/info/rfc8605>.

Authors' Addresses

   Mario Loffredo
   IIT-CNR/Registro.it
   Via Moruzzi,1
   56124 Pisa
   Italy
   Email: mario.loffredo@iit.cnr.it
   URI:   http://www.iit.cnr.it

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   Robert Stepanek
   Fastmail
   PO Box 234, Collins St West
   Melbourne  VIC 8007
   Australia
   Email: rsto@fastmailteam.com
   URI:   https://www.fastmail.com

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JSContact: Converting from and to vCard
draft-ietf-calext-jscontact-vcard-06
