Using JSContact in Registration Data Access Protocol (RDAP) JSON Responses

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Table of Contents

2. JSContact

The JSContact specification defines a data model and JSON representation of contact information that can be used for data storage and exchange in address book or directory applications. It aims to be an alternative to the vCard data format [RFC6350] and to be unambiguous, extendable and simple to process. In contrast with jCard, it is not a direct mapping from the vCard data model and expands semantics where appropriate.¶

JSCard differs from jCard in that it:¶

• follows an object-oriented rather than array-oriented approach;¶

• is simple to process;¶

• requires no extra work in serialization/deserialization from/to a data model;¶

• includes no "jagged" arrays;¶

• prefers maps rather than arrays to implement collections.¶

[RFC9555] provides guidance on the conversion of jCard into JSCard, and vice versa. Appendix A shows JSContact counterparts for the most commonly used jCard properties in an RDAP response.¶

Since JSContact is a generalized representation of contact data, many of its capabilities are not optimised for use in RDAP responses. This document defines a usage profile for JSContact which simplifies the implementation, whether for clients or servers.¶

3. Using JSContact in RDAP Responses

...
"jscard": {
  "@type": "Card",
  "version": "1.0",
  "uid": "7812cafe-336e-5969-988b-ad68f78ae90f",
  "language": "en",
  "name": {
    "full": "Vasya Pupkin"
  },
  "organizations": {
    "org": {
      "name": "My Company"
    }
  },
  "addresses": {
    "addr": {
      "components": [
        { "kind": "name", "value": "1 Street" },
        { "kind": "postOfficeBox", "value": "01001" },
        { "kind": "locality", "value": "Kyiv" }
      ],
      "countryCode": "UA"
    }
  },
  "localizations": {
    "ua": {
      "addresses": {
        "addr": {
          "components": [
           { "kind": "name", "value": "1, Улица" },
           { "kind": "postOfficeBox", "value": "01001" },
           { "kind": "locality", "value": "Киев" }
          ],
          "countryCode": "UA"
        }
      },
      "name": {
        "full": "Вася Пупкин"
      },
      "organizations": {
        "org": {
          "name": "Моя Компания"
        }
      }
    }
  }
}
...

   {
      "rdapConformance": [
         "rdap_level_0",
         "jscard"
      ],
      "objectClassName": "entity",
      "handle":"XXXX",
      "jscard":{
        "@type": "Card",
        "version": "1.0",
        "uid": "74b64df3-2d60-56b4-9df3-8594886f4456",
        "name": {
          "full": "Joe User",
          "components": [
            { "kind": "surname", "value": "User" },
            { "kind": "given", "value": "Joe" }
          ]
        },
        "organizations": {
          "org": {
            "name": "Org Example"
          }
        },
         "addresses": {
           "addr": {
             "components": [
               { "kind": "name", "value": "Main Street 1" },
               { "kind": "locality", "value": "Ludwigshafen am Rhein" },
               { "kind": "region", "value": "Rhineland-Palatinate" },
               { "kind": "postcode", "value": "67067" },
               { "kind": "country", "value": "Germany" }
             ],
             "countryCode": "DE",
             "coordinates": "geo:49.477409, 8.445180"
           },
           "addresses-1": {
             "full": "Somewhere Street 1 Mutterstadt 67112 Germany"
             "contexts": { "private": true }
           }
         },
        "phones": {
          "voice": {
            "features": { "voice": true },
            "number": "tel:+49-1522-3433333"
          },
          "fax": {
            "features": { "fax": true },
            "number": "tel:+49-30-901820"
          }
        },
        "emails": {
          "email": {
            "address": "joe.user@example.com"
          }
        },
        "links": {
          "url": {
            "uri": "https://www.example.com"
          },
          "contact-uri": {
            "kind": "contact",
            "uri": "mailto:contact@example.com"
          }
        }
      },
      "roles":[ "registrar" ],
      "publicIds":[
        {
          "type":"IANA Registrar ID",
          "identifier":"1"
        }
      ],
      "links":[
        {
          "value":"https://example.com/entity/XXXX",
          "rel":"self",
          "href":"https://example.com/entity/XXXX",
          "type" : "application/rdap+json"
        }
      ],
      "events":[
        {
          "eventAction":"registration",
          "eventDate":"1990-12-31T23:59:59Z"
        }
      ],
      "asEventActor":[
        {
          "eventAction":"last changed",
          "eventDate":"1991-12-31T23:59:59Z"
        }
      ]
   }

4. Transition Considerations

"notices": [
  {
    "title": "jCard sunset end",
    "description": ["2022-12-31T23:59:59Z"],
    "links": [
      {
        "value": "https://example.net/entity/XXXX",
        "rel": "alternate",
        "type": "application/rdap+json",
        "href": "https://example.net/entity/XXXX?versioning=versioning-0.2,jscard-0.1"
      },
      {
        "value": "https://example.net/entity/XXXX",
        "rel": "alternate",
        "type": "application/rdap-x+json;extensions=rdap_level_0 jscard",
        "href": "https://example.net/entity/XXXX"
      }
    ]
  }
]

"notices": [
  {
    "title": "jCard deprecation",
    "description": ["jCard has been deprecated"],
  }
]

5. 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 defined by this specification at the time of posting of this Internet-Draft, and is based on a proposal described in RFC 7942 [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. IANA Considerations

7. Security Considerations

Unlike what happens for the "fn" property in jCard, the only mandatory property in JSContact, namely "uid", is not a sensitive information. Nevertheless, RDAP operators can redact it to prevent results from being correlated. Hence, with reference to what is described in [RFC9537], a redaction method must be selected based on the "uid" format.¶

If "uid" is represented as a URN in the uuid namespace, the most appropriate choice is using the "Replacement Value" method along with the nil UUID as replacing value. If it is provided in the free-text format, the "Empty Value" method should be preferred. Otherwise, an URI value can be redacted by using any of the two methods above. For example, the URL of the RDAP entity corresponding to the contact (e.g. "https://example.com/rdap/entity/XYZ12345") can be redacted by replacing the entity handle with a fixed literal (e.g "https://example.com/rdap/entity/REDACTED-HANDLE").¶

8. Acknowledgements

The authors would like to acknowledge the following individuals for their contributions to this document: Jasdip Singh, Andrew Newton, Marc Blanchet, Rick Wilhelm and Francesco Donini.¶

Appendix A. jCard-JSContact Mapping

Provided that the keys defined in Section 3.7 are used for the JSContact maps, the mapping between the most commonly used jCard properties in an RDAP response and their JSContact counterparts is shown in the following. The mapping is done through the use of JSONPath expressions [RFC9535].¶

jCard property:

fn¶

Reference:

Section 6.2.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='fn')][3]¶

JSContact property:

Name.full¶

Reference:

Section 2.2.1 of [RFC9553]¶

Path:

$..jscard.[name.full,localizations.*.name.full]¶

jCard property:

"family name" component of n¶

Reference:

Section 6.2.2 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='n')][3][0]¶

JSContact property:

"postOfficeBox" NameComponent of Name.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[name.components[?(@.kind=='surname')].value,localizations.*.name.components[?(@.kind=='surname')].value]¶

jCard property:

"given name" component of n¶

Reference:

Section 6.2.2 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='n')][3][1]¶

JSContact property:

"given" NameComponent of Name.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[name.components[?(@.kind=='given')].value,localizations.*.name.components[?(@.kind=='given')].value]¶

jCard property:

n¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='n')]¶

JSContact property:

Name¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[name,localizations.*.name]¶

jCard property:

org¶

Reference:

Section 6.6.4 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='org')][3]¶

JSContact property:

Organization.name¶

Reference:

Section 2.2.3 of [RFC9553]¶

Path:

$..jscard.[organizations.org.name,localizations.*.organizations.org.name]¶

jCard property:

tel with type="voice"¶

Reference:

Section 6.4.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[1].type=='voice')][3]¶

JSContact property:

Phone.number¶

Reference:

Section 2.3.3 of [RFC9553]¶

Path:

$..jscard.phones.voice.number¶

jCard property:

tel with type="fax"¶

Reference:

Section 6.4.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[1].type=='fax')][3]¶

JSContact property:

Phone.number¶

Reference:

Section 2.3.3 of [RFC9553]¶

Path:

$..jscard.phones.fax.number¶

jCard property:

email¶

Reference:

Section 6.4.2 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='email')][3]¶

JSContact property:

Email.address¶

Reference:

Section 2.3.1 of [RFC9553]¶

Path:

$..jscard.[emails.email.address,localizations.*.emails.email.address]¶

jCard property:

"label" parameter of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][1].label¶

JSContact property:

Address.full¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.adr.full,localizations.*.addresses.adr.full]¶

jCard property:

"post office box" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][1]¶

JSContact property:

"postOfficeBox" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='postOfficeBox')].value,localizations.*.addresses.addr.components[?(@.kind=='postOfficeBox')].value]¶

jCard property:

"street address" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][2]¶

JSContact property:

"name" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='name')].value,localizations.*.addresses.addr.components[?(@.kind=='name')].value]¶

jCard property:

"locality" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][3]¶

JSContact property:

"locality" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='locality')].value,localizations.*.addresses.addr.components[?(@.kind=='locality')].value]¶

jCard property:

"region" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][4]¶

JSContact property:

"region" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='region')].value,localizations.*.addresses.addr.components[?(@.kind=='region')].value]¶

jCard property:

"postal code" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][5]¶

JSContact property:

"postcode" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='postcode')].value,localizations.*.addresses.addr.components[?(@.kind=='postcode')].value]¶

jCard property:

"country name" component of adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][3][6]¶

JSContact property:

"country" AddressComponent of Address.components¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.components[?(@.kind=='country')].value,localizations.*.addresses.addr.components[?(@.kind=='country')].value]¶

jCard property:

"cc" parameter of adr¶

Reference:

Section 3.1 of [RFC8605]¶

Path:

$..vcardArray[1][?(@[0]=='adr')][1].cc¶

JSContact property:

Address.countryCode¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr.countryCode,localizations.*.addresses.addr.countryCode]¶

jCard property:

adr¶

Reference:

Section 6.3.1 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='adr')]¶

JSContact property:

Address¶

Reference:

Section 2.5.1 of [RFC9553]¶

Path:

$..jscard.[addresses.addr,localizations.*.addresses.addr]¶

jCard property:

contact-uri¶

Reference:

Section 2.1 of [RFC8605]¶

Path:

$..vcardArray[1][?(@[0]=='contact-uri')]¶

JSContact property:

Link.uri¶

Reference:

Section 2.6.3 of [RFC9553]¶

Path:

$..jscard.links.contact-uri.uri¶

jCard property:

url¶

Reference:

Section 6.7.8 of [RFC6350]¶

Path:

$..vcardArray[1][?(@[0]=='url')]¶

JSContact property:

Link.uri¶

Reference:

Section 2.6.3 of [RFC9553]¶

Path:

$..jscard.links.url.uri¶

Authors' Addresses