JSContact: A JSON representation of contact data
draft-ietf-calext-jscontact-05
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 9553.
|
|
|---|---|---|---|
| Authors | Robert Stepanek , Mario Loffredo | ||
| Last updated | 2022-11-25 | ||
| Replaces | draft-ietf-jmap-jscontact, draft-stepanek-jscontact | ||
| Replaced by | draft-ietf-jmap-jscontact | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Formats | |||
| Reviews | |||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Document shepherd | (None) | ||
| IESG | IESG state | Became RFC 9553 (Proposed Standard) | |
| Consensus boilerplate | Yes | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-ietf-calext-jscontact-05
Calendaring Extensions R. Stepanek
Internet-Draft Fastmail
Intended status: Standards Track M. Loffredo
Expires: 29 May 2023 IIT-CNR
25 November 2022
JSContact: A JSON representation of contact data
draft-ietf-calext-jscontact-05
Abstract
This specification defines a data model and JSON representation of
contact card 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 and to be unambiguous,
extendable and simple to process. In contrast to the JSON-based
jCard format, it is not a direct mapping from the vCard data model
and expands semantics where appropriate.
Note
This note is to be removed before publishing as an RFC.
The verbatim case-insensitive string rfc0000 in this document is a
placeholder. It will be replaced with the RFC number of this
document.
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 29 May 2023.
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Copyright Notice
Copyright (c) 2022 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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Relation to the xCard and jCard formats . . . . . . . . . 5
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Type Signatures . . . . . . . . . . . . . . . . . . . . . 5
1.4. Data types . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1. Id . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.2. Int and UnsignedInt . . . . . . . . . . . . . . . . . 6
1.4.3. PatchObject . . . . . . . . . . . . . . . . . . . . . 6
1.4.4. Resource . . . . . . . . . . . . . . . . . . . . . . 7
1.4.5. UTCDateTime . . . . . . . . . . . . . . . . . . . . . 8
1.5. Common properties . . . . . . . . . . . . . . . . . . . . 8
1.5.1. The contexts property . . . . . . . . . . . . . . . . 8
1.5.2. The label property . . . . . . . . . . . . . . . . . 9
1.5.3. The pref property . . . . . . . . . . . . . . . . . . 9
1.6. Versioning . . . . . . . . . . . . . . . . . . . . . . . 10
1.7. Validating JSContact Properties . . . . . . . . . . . . . 10
1.7.1. IANA-registered Properties . . . . . . . . . . . . . 10
1.7.2. Unknown Properties . . . . . . . . . . . . . . . . . 11
1.8. Vendor-Specific Extensions . . . . . . . . . . . . . . . 11
1.8.1. Vendor-specific Properties . . . . . . . . . . . . . 11
1.8.2. Vendor-specific Values . . . . . . . . . . . . . . . 13
1.9. Reserved Property Names . . . . . . . . . . . . . . . . . 13
2. Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1. Metadata properties . . . . . . . . . . . . . . . . . . . 13
2.1.1. @type . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.2. @version . . . . . . . . . . . . . . . . . . . . . . 13
2.1.3. created . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.4. kind . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.5. locale . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.6. members . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.7. prodId . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.8. relatedTo . . . . . . . . . . . . . . . . . . . . . . 16
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2.1.9. uid . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.1.10. updated . . . . . . . . . . . . . . . . . . . . . . . 17
2.2. Name and Organization properties . . . . . . . . . . . . 17
2.2.1. fullName . . . . . . . . . . . . . . . . . . . . . . 17
2.2.2. name . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.3. nickNames . . . . . . . . . . . . . . . . . . . . . . 20
2.2.4. organizations . . . . . . . . . . . . . . . . . . . . 21
2.2.5. speakToAs . . . . . . . . . . . . . . . . . . . . . . 22
2.2.6. titles . . . . . . . . . . . . . . . . . . . . . . . 24
2.3. Contact properties . . . . . . . . . . . . . . . . . . . 25
2.3.1. emails . . . . . . . . . . . . . . . . . . . . . . . 25
2.3.2. onlineServices . . . . . . . . . . . . . . . . . . . 25
2.3.3. phones . . . . . . . . . . . . . . . . . . . . . . . 27
2.3.4. preferredContactChannels . . . . . . . . . . . . . . 28
2.3.5. preferredLanguages . . . . . . . . . . . . . . . . . 29
2.4. Calendaring and Scheduling properties . . . . . . . . . . 30
2.4.1. calendars . . . . . . . . . . . . . . . . . . . . . . 31
2.4.2. schedulingAddresses . . . . . . . . . . . . . . . . . 31
2.5. Address and Location properties . . . . . . . . . . . . . 32
2.5.1. addresses . . . . . . . . . . . . . . . . . . . . . . 32
2.6. Resource properties . . . . . . . . . . . . . . . . . . . 35
2.6.1. cryptoKeys . . . . . . . . . . . . . . . . . . . . . 35
2.6.2. directories . . . . . . . . . . . . . . . . . . . . . 36
2.6.3. links . . . . . . . . . . . . . . . . . . . . . . . . 37
2.6.4. media . . . . . . . . . . . . . . . . . . . . . . . . 38
2.7. Multilingual properties . . . . . . . . . . . . . . . . . 39
2.7.1. localizations . . . . . . . . . . . . . . . . . . . . 39
2.8. Additional properties . . . . . . . . . . . . . . . . . . 40
2.8.1. anniversaries . . . . . . . . . . . . . . . . . . . . 40
2.8.2. keywords . . . . . . . . . . . . . . . . . . . . . . 42
2.8.3. notes . . . . . . . . . . . . . . . . . . . . . . . . 43
2.8.4. personalInfo . . . . . . . . . . . . . . . . . . . . 43
3. Implementation Status . . . . . . . . . . . . . . . . . . . . 45
3.1. IIT-CNR/Registro.it . . . . . . . . . . . . . . . . . . . 45
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 45
4.1. Media Type Registration . . . . . . . . . . . . . . . . . 45
4.2. Creation of the "JSContact Properties" Registry . . . . . 47
4.2.1. Preliminary Community Review . . . . . . . . . . . . 48
4.2.2. Submit Request to IANA . . . . . . . . . . . . . . . 48
4.2.3. Designated Expert Review . . . . . . . . . . . . . . 48
4.2.4. Change Procedures . . . . . . . . . . . . . . . . . . 49
4.2.5. "JSContact Properties" Registry Template . . . . . . 49
4.2.6. Initial Contents for the "JSContact Properties"
Registry . . . . . . . . . . . . . . . . . . . . . . 50
4.3. Creation of the "JSContact Types" Registry . . . . . . . 59
4.3.1. "JSContact Types" Registry Template . . . . . . . . . 59
4.3.2. Initial Contents for the "JSContact Types"
Registry . . . . . . . . . . . . . . . . . . . . . . 59
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4.4. Creation of the "JSContact Enum Values" Registry . . . . 61
4.4.1. "JSContact Enum Values" Registry Property Template . 61
4.4.2. "JSContact Enum Values" Registry Value Template . . . 62
4.4.3. Initial Contents for the "JSContact Enum Values"
Registry . . . . . . . . . . . . . . . . . . . . . . 62
5. Security Considerations . . . . . . . . . . . . . . . . . . . 71
5.1. JSON Parsing . . . . . . . . . . . . . . . . . . . . . . 71
5.2. URI Values . . . . . . . . . . . . . . . . . . . . . . . 72
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.1. Normative References . . . . . . . . . . . . . . . . . . 72
6.2. Informative References . . . . . . . . . . . . . . . . . 74
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 75
1. Introduction
This document defines a data model for contact card data normally
used in address book or directory applications and services. It aims
to be an alternative to the vCard data format [RFC6350] and to
provide a JSON-based standard representation of contact card data.
The key design considerations for this data model are as follows:
* Most of the initial set of attributes should be taken from the
vCard data format [RFC6350] and extensions ([RFC6473], [RFC6474],
[RFC6715], [RFC6869], [RFC8605]). The specification should add
new attributes or value types, or not support existing ones, where
appropriate. Conversion between the data formats need not fully
preserve semantic meaning.
* The attributes of the cards data represented must be described as
a simple key-value pair, reducing complexity of its
representation.
* The data model should avoid all ambiguities and make it difficult
to make mistakes during implementation.
* Extensions, such as new properties and components, MUST NOT lead
to requiring an update to this document.
The representation of this data model is defined in the I-JSON format
[RFC7493], which is a strict subset of the JavaScript Object Notation
(JSON) Data Interchange Format [RFC8259]. Using JSON is mostly a
pragmatic choice: its widespread use makes Card easier to adopt, and
the availability of production-ready JSON implementations eliminates
a whole category of parser-related interoperability issues.
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1.1. Relation to the xCard and jCard formats
The xCard [RFC6351] and jCard [RFC7095] specifications define
alternative representations for vCard data, in XML and JSON format
respectively. Both explicitly aim to not change the underlying data
model. Accordingly, they are regarded as equal to vCard in the
context of this document.
1.2. Terminology
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. Type Signatures
Type signatures are given for all JSON values in this document. The
following conventions are used:
* * - The type is undefined (the value could be any type, although
permitted values may be constrained by the context of this value).
* String - The JSON string type.
* Number - The JSON number type.
* Boolean - The JSON boolean type.
* A[B] - A JSON object where the keys are all of type A, and the
values are all of type B.
* A[] - An array of values of type A.
* A|B - The value is either of type A or of type B.
1.4. Data types
In addition to the standard JSON data types, a couple of additional
data types are common to the definitions of JSContact objects and
properties.
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1.4.1. Id
Where Id is given as a data type, it means a String of at least 1 and
a maximum of 255 octets in size, and it MUST only contain characters
from the URL and Filename Safe base64url alphabet, as defined in
Section 5 of [RFC4648], excluding the pad character (=). This means
the allowed characters are the ASCII alphanumeric characters (A-Za-
z0-9), hyphen (-), and underscore (_).
In many places in JSContact a JSON map is used where the map keys are
of type Id and the map values are all the same type of object. This
construction represents an unordered set of objects, with the added
advantage that each entry has a name (the corresponding map key).
This allows for more concise patching of objects, and, when
applicable, for the objects in question to be referenced from other
objects within the JSContact object. The map keys MUST be preserved
across multiple versions of the JSContact object.
Unless otherwise specified for a particular property, there are no
uniqueness constraints on an Id value (other than, of course, the
requirement that you cannot have two values with the same key within
a single JSON map). For example, two Card objects might use the same
Ids in their respective photos properties. Or within the same Card
object the same Id could appear in the emails and phones properties.
These situations do not imply any semantic connections among the
objects.
1.4.2. Int and UnsignedInt
Where Int is given as a data type, it means an integer in the range
-2^53+1 <= value <= 2^^53-1, the safe range for integers stored in a
floating-point double, represented as a JSON Number.
Where UnsignedInt is given as a data type, it means an integer in the
range 0 <= value <= 2^53-1, represented as a JSON Number.
1.4.3. PatchObject
A PatchObject is of type String[*], and represents an unordered set
of patches on a JSON object. Each key is a path represented in a
subset of JSON pointer format [RFC6901]. The paths have an implicit
leading /, so each key is prefixed with / before applying the JSON
pointer evaluation algorithm.
A patch within a PatchObject is only valid if all the following
conditions apply:
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1. The pointer MUST NOT reference inside an array (i.e., you MUST
NOT insert/delete from an array; the array MUST be replaced in
its entirety instead).
2. All parts prior to the last (i.e., the value after the final
slash) MUST already exist on the object being patched.
3. There MUST NOT be two patches in the PatchObject where the
pointer of one is the prefix of the pointer of the other, e.g.,
addresses/1/city and addresses.
4. The value for the patch MUST be valid for the property being set
(of the correct type and obeying any other applicable
restrictions), or if null the property MUST be optional.
The value associated with each pointer determines how to apply that
patch:
* If null, remove the property from the patched object. If the key
is not present in the parent, this a no-op.
* If non-null, set the value given as the value for this property
(this may be a replacement or addition to the object being
patched).
A PatchObject does not define its own @type property. Instead, a
@type property in a patch MUST be handled as any other patched
property value.
Implementations MUST reject in its entirety a PatchObject if any of
its patches are invalid. Implementations MUST NOT apply partial
patches.
1.4.4. Resource
This data type defines a resource associated with the entity
represented by this card, identified by a URI [RFC3986]. Several
property definitions later in this document refer to the Resource
data type as the basis for their property-specific value types. The
Resource data type defines the properties that are common to all of
them. Property definitions making use of Resource MAY define
additional properties for their value types.
A Resource object has the following properties:
* @type: String (mandatory). The allowed values are defined in the
property definition that makes use of the Resource type.
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type: String (optional). The type of the resource. The allowed
values are defined in the property definition that makes use of
the Resource type.
* uri: String (mandatory). The resource value. This MUST be a
_URI_ as defined in Section 3 of [RFC3986] and updates.
* mediaType: String (optional). Used for URI resource values.
Provides the media type [RFC2046] of the resource identified by
the URI.
* contexts: String[Boolean] (optional). The contexts in which to
use this resource. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this resource in
relation to other resources. Also see Section 1.5.3.
* label: String (optional). A custom label for the value, see
Section 1.5.2.
1.4.5. UTCDateTime
This is a string in [RFC3339] date-time format, with the further
restrictions that any letters MUST be in uppercase, and the time
offset MUST be the character Z. Fractional second values MUST NOT be
included unless non-zero and MUST NOT have trailing zeros, to ensure
there is only a single representation for each date-time.
For example, 2010-10-10T10:10:10.003Z is conformant, but
2010-10-10T10:10:10.000Z is invalid and is correctly encoded as
2010-10-10T10:10:10Z.
1.5. Common properties
Most of the properties in this document are specific to a single
JSContact object type. Such properties are defined along with the
respective object type. The properties in this section however are
common to multiple data types and better be defined just once. Note
that these properties MUST only be set for a JSContact object if they
are explicitly mentioned to be allowed for this object type.
1.5.1. The contexts property
Type: String[Boolean]
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This property associates contact information with one or more
contexts in which it should be used. For example, someone might have
distinct phone numbers for work and private contexts, and may set the
desired context on the respective phone number in the phones
(Section 2.3.3) property.
This document defines the following common contexts. Additional
contexts may be defined in the properties or data types that make use
of this property, may be registered in a future RFC, or be vendor-
specific (Section 1.8.1).
* private: The contact information may be used to contact in a
private context.
* work: The contact information may be used to contact in a
professional context.
1.5.2. The label property
Type: String
This property allows to associate contact data with user-defined
labels. Such labels may be set for phone numbers, email addresses
and resources. Typically, these labels are displayed along with
their associated contact data in graphical user interfaces. While
this specification does not place further restrictions on the value,
implementors SHOULD take in mind that labels best be succinct, so
that they properly display on small graphical interfaces and screens.
1.5.3. The pref property
Type: UnsignedInt
This property allows to define a preference order for contact
information. For example, a card holder may have two email addresses
and prefer to be contacted with one of them.
Its value MUST be in the range 1 and 100. Lower values correspond to
a higher level of preference, with 1 being most preferred. If no
preference is set, then the contact information MUST be interpreted
as being least preferred.
Note that the preference only is defined in relation to contact
information of the same type. For example, the preference orders
within emails and phone numbers are independent of each other.
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1.6. Versioning
Every instance of a JSContact Card indicates which JSContact
specification its IANA-registered properties and values are based on.
This version is indicated by the @version Section 2.1.2 property.
This is to allow implementations correctly process JSContact data
even if future JSContact specifications update or obsolete current
property definitions or other significant changes to existing
JSContact specifications are introduced. All IANA-registered
properties indicate the version at which they got introduced, updated
or obsoleted.
Registering a new JSContact version MUST be done by publishing a new
standard RFC document that updates or obsoletes an existing JSContact
specification. Such RFC document MUST specify all changes to the
former JSContact version and register the new version in the
JSContact Enum Value registry Table 5.
1.7. Validating JSContact Properties
JSContact objects are represented as I-JSON objects [RFC7493] and the
keys of such objects are called properties. This specification
distinguishes between three kinds of properties with regards to
validation: IANA-registered properties and unknown properties are
defined in this section, vendor-specific properties in Section 1.8.1.
A JSContact object is invalid if any its properties are invalid. If
a JSContact object is valid, implementations MUST preserve all its
properties.
1.7.1. IANA-registered Properties
An IANA-registered property is any property that got registered
according to the IANA property registry rules as outlined in
Section 4. All properties defined in this specification are IANA-
registered properties.
Implementations MUST validate IANA-registered properties in JSContact
data, unless they are unknown to the implementation (see
Section 1.7.2). They MUST reject invalid IANA-registered properties.
A property is invalid if its name matches the name of an IANA-
registered property but the value violates its definition according
to the JSContact specification version defined in the Card object
@version property (Section 2.1.2).
IANA-registered property names MUST NOT contain US-ASCII control
characters (U+0000 to U+001F, U+007F), the COLON (U+003A) or
QUOTATION MARK (U+0022) characters. They SHOULD only contain US-
ASCII alphanumeric characters (the ALPHA and DIGIT rules defined in
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Section 6.1 of [RFC2234]), but a notable exception of this rule is
the @type property defined in later sections of this document. IANA-
registered property names SHOULD be notated in lower camel case.
1.7.2. Unknown Properties
Implementations may encounter JSContact data where a property name is
unknown to that implementation, but the name adheres to the
restrictions of an IANA-registered property.
Implementations MUST NOT treat such properties as invalid. Instead,
they MUST preserve them in the JSContact object. Implementations
that create or update JSContact data MUST only set IANA-registered
properties or vendor-specific properties, but MUST preserve any
already existing unknown properties. This is to allow applications
and services to interoperate without data loss, even if they do not
implement the same set of JSContact extensions.
1.8. Vendor-Specific Extensions
Vendors may extend properties and values for experimentation or to
store data that only is useful for a single service or application.
Such extensions need not be registered at IANA, but vendors are
strongly encouraged to do so other than for experimentation. This
specification aims to make it easy to register new entries at IANA.
Typically, sending a short description to the IETF working group
mailing list is enough for Expert Review to make a decision.
Notably, publishing a new RFC document is not required in the general
case. The following sections define the requirements for vendor-
specific properties and values. For further information on how to
register new properties or values at IANA see Section 4.
1.8.1. Vendor-specific Properties
Vendor-specific properties MAY be set in any JSContact object.
Implementations MUST preserve vendor-specific properties in JSContact
data, irrespective if they know their use. They MUST NOT reject the
property value as invalid, unless they are in control of the vendor-
specific property.
Vendor-specific property names MUST start with a vendor-specific
prefix, followed by the COLON character (U+003A), followed by a name
consisting of any other non-control ASCII or non-ASCII characters.
The vendor-specific prefix SHOULD be a domain name under control of
the service or application that sets the property, but it need not
resolve in the Domain Name System [RFC1034] and [RFC1035]. The
prefix ietf.org and its sub-domain names are reserved for IETF
specifications. The name following the prefix MUST NOT contain the
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QUOTATION MARK (U+0022) character. It SHOULD NOT contain the TILDE
(U+007E) and SOLIDUS (U+002F) characters, as these require special-
escaping when encoding a JSON Pointer [RFC6901] including that
property.
The ABNF rule v-extension formally defines valid vendor-specific
property names. Note that the vendor prefix allows for more values
than are allowed as Internationalized Domain Names (IDN) [RFC8499].
This is to allow JSContact implementations simply validate property
names without implementing the full set of rules that apply to domain
names.
v-extension = v-prefix ":" v-name
v-prefix = v-label *("." v-label)
v-label = alnum-int / alnum-int *(alnum-int / "-") alnum-int
alnum-int = ALPHA / DIGIT / NON-ASCII
; see RFC 6350 Section 3.3
v-name = 1*(WSP / "!" / %23-7e / NON-ASCII)
; any characters except CTLs and DQUOTE, also see RFC 6350 Section 3.3
; use of "/" (%x2f) and "~" (%x7e) is discouraged
The value of vendor-specific properties can be any valid JSON value,
and naming restrictions do not apply to such values. Specifically,
if the property value is a JSON object then the keys of such objects
need not be named as vendor-specific properties.
The following all are valid examples of vendor-specific properties.
{
"@type": "Card",
"@version" : "rfc0000",
...
"example.com:foo": "bar",
"example.com:foo2": {
"bar": "baz"
}
...
}
Figure 1
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1.8.2. Vendor-specific Values
Some JSContact IANA-registered properties allow their values to be
vendor-specific. One such example is the kind property
Section 2.1.4, which enumerates its standard values but also allows
for arbitrary vendor-specific values. Such vendor-specific values
MUST be valid v-extensions as defined in Section 1.8.1. This is an
example for a vendor-specific value:
...
"kind": "example.com:kind:foo",
...
Figure 2
Vendors are strongly encouraged to specify new standard values once a
vendor-specific turns out to be useful also for other systems.
1.9. Reserved Property Names
This specification reserves the property name extra at IANA. A
JSContact object MUST NOT be defined to have a property with this
name. This is to provide implementations with a name to map unknown
or vendor-specific properties to, and which never may occur as a
property in a JSContact object.
2. Card
MIME type: application/jscontact+json;type=card
A Card object stores information about a person, organization or
company.
2.1. Metadata properties
2.1.1. @type
Type: String (mandatory).
Specifies the type of this object. This MUST be Card.
2.1.2. @version
Type: String (mandatory).
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Specifies the version of the JSContact specification used to define
this card. The value MUST be rfc0000 if the JSContact object is
defined according to this RFC document. It MAY differ if future RFC
documents obsolete this specification.
2.1.3. created
Type: UTCDateTime (optional).
The date and time when this Card object was created.
...
"created": "1994-09-30T14:35:10Z",
...
Figure 3: created example
2.1.4. kind
Type: String (optional). The kind of the entity the Card represents.
The value MUST be either one of the following values, registered in a
future RFC, or a vendor-specific value (Section 1.8.1):
* individual: a single person
* group: a group person of persons or entities
* org: an organization
* location: a named location
* device: a device, such as appliances, computers, or network
elements
* application: a software application
...
"kind": "individual",
...
Figure 4: kind example
2.1.5. locale
Type: String (optional).
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This is the language tag, as defined in [RFC5646], that best
describes the locale used for text in the card or card group. Note
that such values MAY be localized in the localizations property
Section 2.7.1.
...
"locale": "de-AT",
...
Figure 5: locale example
2.1.6. members
Type: String[Boolean] (optional).
This identifies the set of cards that are members of this group card.
Each key in the set is the uid property value of the member, each
boolean value MUST be true. If this property is set, then the value
of the kind property MUST be group.
The opposite is not true. A group Card will usually contain the
members property to specify the members of the group, but it is not
required to. A group Card without the members property can be
considered an abstract grouping, or one whose members are known
empirically (e.g. "IETF Participants").
...
"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 6: members example
2.1.7. prodId
Type: String (optional).
The identifier for the product that created the Card object.
...
"prodId": "-//ONLINE DIRECTORY//NONSGML Version 1//EN",
...
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Figure 7: prodId example
2.1.8. relatedTo
Type: String[Relation] (optional).
Relates the object to other Card objects. This is represented as a
map, where each key is the uid of the related Card and the value
defines the relation. The Relation object has the following
properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Relation.
* relation: String[Boolean] (optional, default: empty Object)
Describes how the linked object is related to the linking object.
The relation is defined as a set of relation types. If empty, the
relationship between the two objects is unspecified. Keys in the
set MUST be one of the RELATED property [RFC6350] type parameter
values, or an IANA-registered value, or a vendor-specific value
(Section 1.8.1). The value for each key in the set MUST be true.
...
"relatedTo" : {
"urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6" : {
"@type" : "Relation",
"relation" : {
"friend" : true
}
},
"8cacdfb7d1ffdb59@example.com" : {
"@type" : "Relation",
"relation" : { }
},
},
...
Figure 8: relatedTo example
2.1.9. uid
Type: String (mandatory).
An identifier, used to associate the object as the same across
different systems, address books and views. The value SHOULD be a
URN [RFC8141] but for compatibility with [RFC6350] it MAY also be a
URI [RFC3986] or free-text value. The value of the URN SHOULD be in
the uuid namespace [RFC4122]. As of this writing, a revision of
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[RFC4122] is being worked on and is likely to introduce new UUID
versions and best practices to generate global unique identifiers.
Implementors SHOULD follow any recommendations described there.
Until then, implementations SHOULD generate identifiers using the
random or pseudo-random UUID version described in Section 4.4 of
[RFC4122].
...
"uid": "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6",
...
Figure 9: uid example
2.1.10. updated
Type: UTCDateTime (optional).
The date and time when the data in this Card object was last
modified.
...
"updated": "1995-10-31T22:27:10Z",
...
Figure 10: updated example
2.2. Name and Organization properties
2.2.1. fullName
Type: String (optional).
The full name (e.g. the personal name and surname of an individual,
the name of an organization) of the entity represented by this card.
The purpose of this property is to define a name, even if the
individual name components are not known. In addition, it is meant
to provide alternative versions of the name for internationalization.
Implementations SHOULD prefer using the _name_ property over this one
and SHOULD NOT store the concatenated name component values in this
property.
...
"fullName": "Mr. John Q. Public, Esq.",
...
Figure 11: fullName example
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2.2.2. name
Type: Name (optional).
The name of the entity represented by this Card.
A Name object has the following properties
* @type: Name (mandatory). Specifies the type of this object. This
MUST be Name.
* components: NameComponent[] (mandatory). The components making up
the name. The component list MUST have at least one entry.
Name components SHOULD be ordered such that their values joined as
a String produce a valid full name of this entity. This
specification does not mandate how to do this but recommends the
following: If at least one of two adjacent name components is of
type separator then implementations SHOULD join their values
without any additional character. Otherwise, inserting a single
Space character in between name component values is a good choice.
* locale: String (optional). The locale of the name. The value
MUST be a language tag as defined [RFC5646].
* sortAs: String[String] (optional).
This defines how this name lexicographically sorts in relation to
other names when compared by a name component type. The key in
the map defines the name component type. The value for that key
defines the verbatim string to compare when sorting by this name
component type. Absence of a key indicates that this name
component type should not be considered during sort. Sorting by
that missing name component type or if the sortAs is not set is
implementation-specific.
Each key in the map MUST be a valid name component type value as
defined for the type property of the NameComponent object (see
below). For each key in the map there MUST exist at least one
NameComponent object having that type in the components property
of this name.
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This illustrates the use of sortAs. It indicates that the middle
name followed by both surnames should be used when sorting this
name by surname. The absence of the middle indicates that the
middle name on its own should be disregarded during sort. Even
though the name only contains one name component for the given
name, the sortAs property still explicitly defines how to sort by
given name as otherwise sorting by it would be undefined.
...
"name": {
"@type": "Name",
"components": [{
"@type": "NameComponent",
"type": "given",
"value": "Robert"
}, {
"@type": "NameComponent",
"type": "middle",
"value": "Pau"
}, {
"@type": "NameComponent",
"type": "surname",
"value": "Shou"
}, {
"@type": "NameComponent",
"type": "surname",
"value": "Chang"
}],
"sortAs": {
"surname": "Pau Shou Chang",
"given": "Robert"
}
},
...
Figure 12: name example
A NameComponent object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be NameComponent.
* value: String (mandatory). The value of this name component.
* type: String (mandatory). The type of this name component. The
value MUST be either one of the following values, registered in a
future RFC, or a vendor-specific value (Section 1.8.1):
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- prefix. The value is an honorific title(s), e.g. "Mr", "Ms",
"Dr".
- given. The value is a given name, also known as "first name",
"personal name".
- surname. The value is a surname, also known as "last name",
"family name".
- middle. The value is a middle name, also known as "additional
name".
- suffix. The value is an honorific suffix, e.g. "B.A.",
"Esq.".
- separator. A formatting separator for two name components.
The value property of the component includes the verbatim
separator, for example a hyphen character.
* rank: UnsignedInt (optional, default: 1). Defines the rank of
this name component to other name components of the same type. If
set, the property value MUST be higher than or equal to 1.
For example, two name components of type surname may have their
rank property value set to 1 and 2, respectively. In this case,
the first name component defines the surname, and the second name
component the secondary surname.
Note that this property value does not indicate the order in which
to print name components of the same type. Some cultures print
the secondary surname before the first surname, others the first
before the second. Implementations SHOULD inspect the locale
property of the Name object to determine the appropriate
formatting. They MAY print name components in order of appearance
in the components property of the Name object.
2.2.3. nickNames
Type: Id[NickName] (optional).
The nick names of the entity represented by this card. A NickName
object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be NickName.
* name: String (mandatory). The nick name.
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* contexts: String[Boolean] (optional) The contexts in which to use
this nick name. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this nick name in
relation to other nick names. Also see Section 1.5.3.
...
"nickNames": {
"k391": {
"@type": "NickName",
"name": "Johnny"
}
},
...
Figure 13: nickNames example
2.2.4. organizations
Type: Id[Organization] (optional).
The companies or organization names and units associated with this
card. An Organization object has the following properties, of which
at least one of name and units MUST be set:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Organization.
* name: String (mandatory). The name of this organization.
* sortAs: String (optional). This defines how this organization
name lexicographically sorts in relation to other organizations
when compared by name. The value defines the verbatim string
value to compare. In absence of this property, the name property
value SHOULD be used for comparison.
* units: OrgUnit[] (optional). A list of organizational units. If
set, the list MUST contain at least one entry.
A OrgUnit object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be OrgUnit.
* name: String (optional). The name of this organizational unit.
If set, the value MUST be a non-empty string.
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* sortAs: String (optional). This defines how this organization
unit name lexicographically sorts in relation to other
organizational units of the same level when compared by name. The
level is defined by the array index of this organizational unit in
the units property of the Organization object. The property value
defines the verbatim string value to compare. In absence of this
property, the name property value SHOULD be used for comparison.
...
"organizations": {
"o1": {
"@type": "Organization",
"name": "ABC, Inc.",
"units":[
{"@type": "OrgUnit", "name": "North American Division"},
{"@type": "OrgUnit", "name": "Marketing"}
],
"sortAs": "ABC"
}
},
...
Figure 14: organizations example
2.2.5. speakToAs
Type: SpeakToAs (optional).
Provides information how to address, speak to or refer to the entity
that is represented by this card. A SpeakToAs object has the
following properties, of which at least one property other than @type
MUST be set:
* @type: String (mandatory). Specifies the type of this object.
This MUST be SpeakToAs.
* grammaticalGender: String (optional). Defines which grammatical
gender to use in salutations and other grammatical constructs.
Allowed values are:
- animate
- female
- inanimate
- male
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- neuter
Note that the grammatical gender does not allow to infer the
gender identities or assigned sex of the contact.
* pronouns: Id[Pronouns] (optional). Defines the pronouns that the
contact chooses to use for themselves.
A Pronouns object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Pronouns.
* pronouns: String (mandatory). Defines the pronouns. Any value or
form is allowed. Examples in English include she/her and
they/them/theirs. The value MAY be overridden in the
localizations property (Section 2.7.1).
* contexts: String[Boolean] (optional). The contexts in which to
use these pronouns. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of these pronouns in
relation to other pronouns in the same context. Also see
Section 1.5.3.
...
"speakToAs": {
"grammaticalGender": "neuter",
"pronouns": {
"k19": {
"@type": "Pronouns",
"pronouns": "they/them",
"pref": 2
},
"k32": {
"@type": "Pronouns",
"pronouns": "xe/xir",
"pref": 1
}
}
},
...
Figure 15: speakToAs example
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2.2.6. titles
Type : Id[Title] (optional).
The job titles or functional positions of the entity represented by
this card. A Title has object the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Title.
* name: String (mandatory). The title or role name of the entity
represented by this card.
* type: String (optional, default title). Describes the
organizational or situational type of this title. Some
organizations and individuals distinguish between _titles_ as
organizational positions and _roles_ as more temporary
assignments, such as in project management. If set, the property
value MUST either be one of title and role, or be registered in a
future RFC, or a vendor-specific value (Section 1.8.1).
* organization: Id (optional). The id of the organization in which
this title is held.
...
"titles": {
"le9": {
"@type": "Title",
"type": "title",
"name": "Research Scientist"
},
"k2": {
"@type": "Title",
"type": "role",
"name": "Project Leader",
"organization": "o2"
}
},
"organizations": {
"o2": {
"@type": "Organization",
"name": "ABC, Inc."
}
},
...
Figure 16: titles example
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2.3. Contact properties
2.3.1. emails
Type: Id[EmailAddress] (optional).
The email addresses to contact the entity represented by this card.
An EmailAddress object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be EmailAddress.
* address: String (mandatory). The email address. This MUST be an
_addr-spec_ value as defined in Section 3.4.1 of [RFC5322].
* contexts: String[Boolean] (optional). The contexts in which to
use this email address. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this email
address in relation to other email addresses. Also see
Section 1.5.3.
* label: String (optional). A custom label for the value, see
Section 1.5.2.
...
"emails": {
"e1": {
"@type": "EmailAddress",
"contexts": { "work": true },
"address": "jqpublic@xyz.example.com"
},
"e2": {
"@type": "EmailAddress",
"address": "jane_doe@example.com",
"pref": 1
}
},
...
Figure 17: emails example
2.3.2. onlineServices
Type: Id[OnlineService] (optional).
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The online services that are associated with the entity represented
by this card. This can be messaging services, social media profiles,
and other. An OnlineService object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be OnlineService.
* service: String (optional). The name of the online service or
protocol. This SHOULD be the canonical service name including
capitalization. Examples are GitHub, kakao, Mastodon.
* user: String (mandatory). This identifies the entity represented
by this card at this online service. The type property defines
the how to interpret the value.
* type: String (mandatory). This defines the type of the identifier
in the user property. The type MUST be either one of the
following values, registered in a future RFC, or a vendor-specific
value (Section 1.8.1):
- impp: The value of the user property is a URI primarily used
for instant messaging. The service property SHOULD be set.
- uri: The value of the user property is a service-specific URI,
such as for a social media service. The service property
SHOULD be set.
- username: The value of the user property is a service-specific
username, such as for a social media service. Any free-text
value is allowed. The service property MUST be set.
* contexts: String[Boolean] (optional). The contexts in which to
use this service. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this service in
relation to other services. Also see Section 1.5.3.
* label: String (optional). A custom label for the value, see
Section 1.5.2.
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...
"onlineServices": {
...
"x1": {
"@type": "OnlineService",
"user": "xmpp:alice@example.com",
"type": "impp",
"pref": 1
},
...
},
...
Figure 18: onlineServices example
2.3.3. phones
Type: Id[Phone] (optional).
The phone numbers to contact the entity represented by this card. A
Phone object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Phone.
* number: String (mandatory). The phone number, as either a URI or
free-text. Typical URI schemes are the [RFC3966] tel or [RFC3261]
sip schemes, but any URI scheme is allowed.
* features: String[Boolean] (optional). The set of contact features
that this phone number may be used for. The set is represented as
an object, with each key being a method type. The boolean value
MUST be true. The method type MUST be either one of the following
values, registered in a future RFC, or a vendor-specific value
(Section 1.8.1):
- voice The number is for calling by voice.
- fax The number is for sending faxes.
- pager The number is for a pager or beeper.
- text The number supports text messages (SMS).
- cell The number is for a cell phone.
- textphone The number is for a device for people with hearing or
speech difficulties.
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- video The number supports video conferencing.
* contexts: String[Boolean] (optional). The contexts in which to
use this number. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this number in
relation to other numbers. Also see Section 1.5.3.
* label: String (optional). A custom label for the value, see
Section 1.5.2.
...
"phones": {
"tel0": {
"@type": "Phone",
"contexts": { "private": true },
"features": { "voice": true },
"number": "tel:+1-555-555-5555;ext=5555",
"pref": 1
},
"tel3": {
"@type": "Phone",
"contexts": { "work": true },
"number": "tel:+33-01-23-45-67"
}
},
...
},
...
Figure 19: phones example
2.3.4. preferredContactChannels
Type : String[ContactChannelPreference[]] (optional).
Defines which channel the entity represented by this card prefers to
be contacted with. The keys in the object MUST be either one of the
following values, registered in a future RFC, or a vendor-specific
value (Section 1.8.1):
* addresses. The entity prefers to be contacted by postal delivery
to one of the entries in addresses (Section 2.5.1).
* emails. The entity prefers to be contacted by one of the entries
in emails (Section 2.3.1).
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* onlineServices. The entity prefers to be contacted by one of the
entries in onlineServices (Section 2.3.2).
* phones. The entity prefers to be contacted by one of the entries
in phones (Section 2.3.3).
The values in the object are a (possibly empty) list of preferences
for this contact channel. A valid ContactChannelPreference object
MUST have at least one of its properties set in addition to the @type
property.
A ContactChannelPreference object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be ContactChannelPreference.
* contexts: String[Boolean] (optional). Defines the contexts in
which to use this contact channel. Also see Section 1.5.1.
* pref: UnsignedInt (optional). Defines the preference of this
contact channel in relation to other contact channels with the
same contexts. Also see Section 1.5.3.
...
"preferredContactChannels": {
"emails":[
{
"@type": "ContactChannelPreference",
"pref": 1
}
],
"phones":[
{
"@type": "ContactChannelPreference",
"pref": 2
}
]
},
...
Figure 20: preferredContactChannels example
2.3.5. preferredLanguages
Type : String[LanguagePreference[]] (optional).
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Defines the preferred languages for contacting the entity associated
with this card. The keys in the object MUST be [RFC5646] language
tags. The values are a (possibly empty) list of contact language
preferences for this language. A valid LanguagePreference object
MUST have at least one of its properties set in addition to the @type
property.
A LanguagePreference object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be LanguagePreference.
* contexts: String[Boolean] (optional). Defines the contexts in
which to use this language. Also see Section 1.5.1.
* pref: UnsignedInt (optional). Defines the preference of this
language in relation to other languages of the same contexts.
Also see Section 1.5.3.
...
"preferredLanguages": {
"en":[
{
"@type": "LanguagePreference",
"contexts": { "work": true },
"pref": 1
}
],
"fr":[
{
"@type": "LanguagePreference",
"contexts": { "work": true },
"pref": 2
},
{
"@type": "ContactLanguage",
"contexts": { "private": true }
}
]
},
...
Figure 21: preferredLanguages example
2.4. Calendaring and Scheduling properties
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2.4.1. calendars
Type: Id[CalendarResource] (optional).
These are resources for calendaring, such as calendars to lookup
free-busy information for the entity represented by this card. A
CalendarResource object has all properties of the Resource
(Section 1.4.4) data type, with the following additional definitions:
* The @type property value MUST be CalendarResource.
The type property value MUST be one of the following, or be defined
in a future RFC or vendor-specific:
* calendar The resource is a calendar that contains entries such as
calendar events or tasks.
* freeBusy The resource allows for free-busy lookups, for example to
schedule group events.
...
"calendars": {
...
"calA": {
"@type": "CalendarResource",
"type": "calendar",
"uri": "ftp://ftp.example.com/calA.ics",
"mediaType": "text/calendar"
},
"project-a": {
"@type": "CalendarResource",
"type": "freeBusy",
"uri": "ftp://example.com/busy/project-a.ifb",
"mediaType": "text/calendar"
},
...
},
...
Figure 22: calendars example
2.4.2. schedulingAddresses
Type: Id[SchedulingAddress] (optional).
The scheduling addresses by which the entity may receive calendar
scheduling invitations. A SchedulingAddress object has the following
properties:
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* @type: String (mandatory). Specifies the type of this object.
This MUST be SchedulingAddress.
* uri: String (mandatory). The address to use for calendar
scheduling with this contact. This MUST be a URI as defined in
Section 3 of [RFC3986] and updates.
* contexts: String[Boolean] (optional). The contexts in which to
use this scheduling address. Also see Section 1.5.1.
* pref: UnsignedInt (optional). The preference of this scheduling
address in relation to other scheduling address. Also see
Section 1.5.3.
* label: String (optional). A custom label for the scheduling
address, see Section 1.5.2.
...
"schedulingAddresses": {
...
"sched1": {
"@type": "SchedulingAddress",
"uri": "mailto:janedoe@example.com"
},
...
},
...
Figure 23: schedulingAddresses example
2.5. Address and Location properties
2.5.1. addresses
Type: Id[Address] (optional).
A map of address ids to Address objects, containing physical
locations. An Address object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Address.
* fullAddress: String (optional). The complete address. This
property is mainly useful to represent addresses of which the
individual address components are unknown, or to provide localized
representations.
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* street: StreetComponent[] (optional). The street address. The
concatenation of the component values, separated by whitespace,
SHOULD result in a valid street address for the address locale.
Doing so, implementations MAY ignore any separator components.
The StreetComponent object type is defined in the paragraph below.
* locality: String (optional). The city, town, village, post town,
or other locality within which the street address may be found.
* region: String (optional). The province, such as a state, county,
or canton within which the locality may be found.
* country: String (optional). The country name.
* postcode: String (optional). The postal code, post code, ZIP code
or other short code associated with the address by the relevant
country's postal system.
* countryCode: String (optional). The ISO-3166-1 country code.
* coordinates: String (optional). A [RFC5870] "geo:" URI for the
address.
* timeZone: String (optional). Identifies the time zone this
address is located in. This MUST be a time zone name registered
in the IANA Time Zone Database (https://www.iana.org/time-zones)
* contexts: String[Boolean] (optional). The contexts of the address
information. The boolean value MUST be true. In addition to the
common contexts (Section 1.5.1), allowed key values are:
- billing An address to be used for billing.
- postal An address to be used for delivering physical items.
* pref: UnsignedInt (optional). The preference of this address in
relation to other addresses. Also see Section 1.5.3.
A StreetComponent object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be StreetComponent.
* type: String (mandatory). The type of this street component. The
value MUST be either one of the following values, registered in a
future RFC, or a vendor-specific value (Section 1.8.1):
- name. The street name.
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- number. The street number.
- apartment. The apartment number or identifier.
- room. The room number or identifier.
- extension. The extension designation or box number.
- direction. The cardinal direction, e.g. "North".
- building. The building or building part this address is
located in.
- floor. The floor this address is located on.
- postOfficeBox. The post office box number or identifier.
- separator. A separator for two street components. The value
property of the component includes the verbatim separator, for
example a newline character.
- unknown. A street component value for which no type is known.
* value: String (mandatory). The value of this street component.
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...
"addresses": {
"k23" : {
"@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"
},
"k24": {
"@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 24: addresses example
2.6. Resource properties
2.6.1. cryptoKeys
Type: Id[CryptoResource] (optional).
These are cryptographic resources such as public keys and
certificates associated with the entity represented by this card. A
CryptoResource object has all properties of the Resource
(Section 1.4.4) data type, with the following additional definitions:
* The @type property value MUST be CryptoResource.
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* The type property value either is not set, is defined in a future
RFC or vendor-specific.
...
"cryptoKeys": {
...
"mykey": {
"@type": "CryptoResource",
"uri": "http://www.example.com/keys/jdoe.cer"
},
...
},
...
Figure 25: cryptoKeys example
2.6.2. directories
Type: Id[DirectoryResource] (optional).
These are directory service resources, such as entries in a directory
or organizational directories for lookup. A DirectoryResource object
has all properties of the Resource (Section 1.4.4) data type, with
the following additional definitions:
* The @type property value MUST be DirectoryResource.
The type property value MUST be one of the following, or be defined
in a future RFC or vendor-specific:
* directory The resource is a directory service where the entity
represented by this card is part of. This typically is an
organizational directory that also contains associated entities,
e.g. co-workers and management in a company directory.
* entry The resource is a directory entry of the entity represented
by this card. In contrast to the directory type, this is the
specific URI for the entity _within_ a directory.
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...
"directories": {
...
"dir1": {
"@type": "DirectoryResource",
"type": "entry",
"uri": "http://directory.example.com/address books/jdoe/Jean%20Dupont.vcf"
},
"dir2": {
"@type": "DirectoryResource",
"type": "directory",
"uri": "ldap://ldap.tech.example/o=Example%20Tech,ou=Engineering",
"pref": 1
},
...
},
...
Figure 26: directories example
2.6.3. links
Type: Id[LinkResource] (optional).
These are links to resources that do not fit any of the other use-
case specific resource properties. A LinkResource object has all
properties of the Resource (Section 1.4.4) data type, with the
following additional definitions:
* The @type property value MUST be LinkResource.
The type property value either is not set, or MUST be one of the
following, or be defined in a future RFC or vendor-specific:
* contact The resource is an URI by which the entity represented by
this card may be contacted, including web forms or other media
that require user interaction.
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...
"links": {
...
"link3": {
"@type": "LinkResource",
"type": "contact",
"uri": "mailto:contact@example.com",
"pref": 1
},
...
},
...
Figure 27: links example
2.6.4. media
Type: Id[MediaResource] (optional).
These are media resources such as photographs, avatars, or sounds
associated with the entity represented by this card. A MediaResource
object has all properties of the Resource (Section 1.4.4) data type,
with the following additional definitions:
* The @type property value MUST be MediaResource.
The type property value must be one of the following, or be defined
in a future RFC or vendor-specific:
* photo The resource is a photograph or avatar.
* sound The resource is audio media, e.g. to specify the proper
pronunciation of the name property contents.
* logo The resource is a graphic image or logo associated with
entity represented by this card.
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...
"media": {
...
"res45": {
"@type": "MediaResource",
"type": "sound",
"uri": "CID:JOHNQPUBLIC.part8.19960229T080000.xyzMail@example.com"
},
"res47": {
"@type": "MediaResource",
"type": "logo",
"uri": "http://www.example.com/pub/logos/abccorp.jpg"
},
"res1": {
"@type": "MediaResource",
"type": "photo",
"uri": "http://www.example.com/pub/photos/jqpublic.gif"
},
...
},
...
Figure 28: media example
2.7. Multilingual properties
2.7.1. localizations
Type: String[PatchObject] (optional).
A map of language tags [RFC5646] to patches, which localize a
property value into the locale of the respective language tag. The
paths in the PatchObject keys are relative to the Card object that
includes the localizations property. A patch MUST NOT target the
localizations property.
A localized Card SHOULD NOT contain more information than its non-
localized variant. If only localized values are available for
properties of a Card, then implementations SHOULD choose one of them
to be the main locale and set the locale property accordingly.
The following example shows a Card object, where one of its addresses
Tokyo is localized for the jp locale.
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...
"locale": "en",
"addresses": {
"addr1": {
"@type": "Address",
"locality": "Tokyo",
}
},
"localizations": {
"jp": {
"addresses/addr1/locality":"東京"
}
...
}
Figure 29
2.8. Additional properties
2.8.1. anniversaries
Type : Id[Anniversary] (optional).
These are memorable dates and events for the entity represented by
this card. An Anniversary object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Anniversary.
* type: String (optional). Specifies the type of the anniversary.
This RFC predefines the following types, but implementations MAY
use additional values:
- birth: a birthday anniversary
- death: a deathday anniversary
- wedding: a wedding day anniversary
* date: Timestamp|PartialDate (mandatory).
The date of this anniversary in the Gregorian calendar. This MUST
either be a whole or partial calendar date or a complete UTC
timestamp (see the definition of the Timestamp and PartialDate
object types below).
* place: Address (optional). An address associated with this
anniversary, e.g. the place of birth or death.
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A Timestamp object has the following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Timestamp.
* utc: UTCDateTime (mandatory). Specifies the point in time in UTC
time.
A PartialDate object represents a complete or partial calendar date
in the Gregorian calendar. It represents either a complete date, or
a year, or a month in a year, or a day in a month. It has the
following properties, of which at least year or month and day MUST be
set:
* @type: String (mandatory). Specifies the type of this object.
This MUST be PartialDate.
* year: UnsignedInt (optional). This is the calendar year.
* month: UnsignedInt (optional). This is the calendar month,
represented as the integers 1 <= month <= 12. If this property is
set then either year or day MUST be set.
* day: UnsignedInt (optional). This is the calendar month day,
represented as the integers 1 <= day <= 31, depending on the
validity within the month and year. If this property is set then
month MUST be set.
* calendarScale: String (optional). This is the calendar system in
which this date occurs, in lowercase. This MUST be either a CLDR-
registered calendar system name [RFC7529] or a vendor-specific
value). Note that the year, month and day still MUST be
represented in the Gregorian calendar.
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...
"anniversaries": {
"k8" : {
"@type": "Anniversary",
"type": "birth",
"date": "1953-10-15T23:10:00Z",
"place": {
"@type": "Address",
"fullAddress": "Mail Drop: TNE QB\n123 Main Street\nAny Town, CA 91921-1234\nU.S.A."
}
},
"k9" : {
"@type": "Anniversary",
"type": "death",
"date": "1996-04-15",
"place": {
"@type": "Address",
"fullAddress": "4445 Courtright Street\nNew England, ND 58647\nU.S.A."
}
},
"k12" : {
"@type": "Anniversary",
"type": "wedding",
"date": "1986-02-01"
}
},
...
Figure 30: anniversaries example
2.8.2. keywords
Type: String[Boolean] (optional). A set of free-text keywords, also
known as _tags_. The set is represented as an object, with each key
being a keyword. The boolean value MUST be true.
...
"keywords": {
"internet": true,
"IETF": true
},
...
Figure 31: keywords example
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2.8.3. notes
Type: Id[Note] (optional).
Free-text notes associated with this card. A Note object has the
following properties:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Note.
* note: String (mandatory). The free text value of this note.
* created: UTCDateTime (optional). The date and time when this note
was created.
* author: Author (optional). The author of this note.
An Author object has the following properties, of which at least one
other than @type MUST be defined:
* @type: String (mandatory). Specifies the type of this object.
This MUST be Author.
* name: String (optional). The name of this author.
* uri: String (optional). A URI value that identifies the author.
...
"notes": {
"n1" : {
"note": "This fax number is operational 0800 to 1715 EST, Mon-Fri.",
"created": "2022-11-23T15:01:32Z",
"author": {
"@type": "Author",
"name": "John"
}
}
},
...
Figure 32: notes example
2.8.4. personalInfo
Type: Id[PersonalInformation] (optional).
Defines personal information about the entity represented by this
card. A PersonalInformation object has the following properties:
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* @type: String (mandatory). Specifies the type of this object.
This MUST be PersonalInformation.
* type: String (mandatory). Specifies the type for this personal
information. The value MUST be one of the following, or be
registered in a future RFC or vendor-specific (Section 1.8.1):
- expertise: a field of expertise or credential
- hobby: a hobby
- interest: an interest
* value: String (mandatory). The actual information. This
generally is free-text, but future specifications MAY restrict
allowed values depending on the type of this PersonalInformation.
* level: String (optional). Indicates the level of expertise, or
engagement in hobby or interest. The value MUST be one of the
following, or be registered in a future RFC or vendor-specific
(Section 1.8.1): high, medium and low.
...
"personalInfo": {
...
"pi2" : {
"@type": "PersonalInformation",
"type": "expertise",
"value": "chemistry",
"level": "high"
},
"pi1" : {
"@type": "PersonalInformation",
"type": "hobby",
"value": "reading",
"level": "high"
},
"pi6" : {
"@type": "PersonalInformation",
"type": "interest",
"value": "r&b music",
"level": "medium"
},
...
},
...
Figure 33: personalInfo example
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3. Implementation Status
NOTE: Please remove this section and the reference to [RFC7942] 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 [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
[RFC7942], "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".
3.1. IIT-CNR/Registro.it
* Responsible Organization: Institute of Informatics and Telematics
of National Research Council (IIT-CNR)/Registro.it
* Location: https://rdap.pubtest.nic.it/
(https://rdap.pubtest.nic.it/)
* Description: This implementation includes support for RDAP queries
using data from the public test environment of .it ccTLD. The
RDAP server returns responses including Card in place of jCard
when queries contain the parameter jscard=1.
* 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
4. IANA Considerations
4.1. Media Type Registration
This document defines a media type for use with JSContact data
formatted in JSON.
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Type name: application
Subtype name: jscontact+json
Required parameters: type
The type parameter conveys the type of the JSContact data in the
body part. The allowed parameter values correspond to the @type
property of the JSON-formatted JSContact object in the body. This
RFC specifies a single type, but future RFC documents MAY extend
this list:
card: The @type property value of the JSContact object MUST be
Card.
The parameter MUST NOT occur more than once.
Optional parameters: version
The version parameter conveys the version of the JSContact object
in the body part. Its value MUST match the value of the version
property of the JSContact object.
Encoding considerations: This is the same as the encoding
considerations of application/json, as specified in Section 11 of
[RFC8259].
Security considerations: See Section 5 of this document.
Interoperability considerations: While JSContact is designed to
avoid ambiguities as much as possible, when converting objects
from other contact formats to/from JSContact, it is possible that
differing representations for the same logical data or ambiguities
in interpretation might arise. The semantic equivalence of two
JSContact objects may be determined differently by different
applications, for example, where URL values differ in case between
the two objects.
Published specification: TBD
Applications that use this media type: Applications that currently
make use of the text/vcard media type can use this as an
alternative.
Fragment identifier considerations: A JSON Pointer fragment
identifier may be used, as defined in [RFC6901], Section 6.
Additional information: Magic number(s): N/A
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File extensions(s): N/A
Macintosh file type code(s): N/A
Person & email address to contact for further information: calsify@i
etf.org
Intended usage: COMMON
Restrictions on usage: N/A
Author: See the "Author's Address" section of this document.
Change controller: IETF
4.2. Creation of the "JSContact Properties" Registry
IANA has created the "JSContact Properties" registry to allow
interoperability of extensions to JSContact objects.
This registry follows the Expert Review process ([RFC8126],
Section 4.5). If the "Intended Usage" field is common, sufficient
documentation is required to enable interoperability. Preliminary
community review for this registry is optional but strongly
encouraged.
A registration can have an intended usage of common, reserved, or
obsolete. IANA will list registrations with a common usage
designation prominently and separately from those with other intended
usage values.
A reserved registration reserves a property name without assigning
semantics to avoid name collisions with future extensions or protocol
use.
An obsolete registration denotes a property that is no longer
expected to be added by up-to-date systems. A new property has
probably been defined covering the obsolete property's semantics.
Every registration MUST define the version of the JSContact
specification on which the definition of the newly registered,
updated or obsoleted item is based on. This typically is the latest
specification version that is in effect when the property gets
registered. The version MUST be one of the allowed values of the
@version property in the JSContact Enum Value registry (see Table 5).
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The JSContact property registration procedure is not a formal
standards process but rather an administrative procedure intended to
allow community comment and check it is coherent without excessive
time delay. It is designed to encourage vendors to document and
register new properties they add for use cases not covered by the
original specification, leading to increased interoperability.
4.2.1. Preliminary Community Review
Notice of a potential new registration SHOULD be sent to the Calext
mailing list <calsify@ietf.org> for review. This mailing list is
appropriate to solicit community feedback on a proposed new property.
Property registrations must be marked with their intended use:
"common", "reserved", or "obsolete".
The intent of the public posting to this list is to solicit comments
and feedback on the choice of the property name, the unambiguity of
the specification document, and a review of any interoperability or
security considerations. The submitter may submit a revised
registration proposal or abandon the registration completely at any
time.
4.2.2. Submit Request to IANA
Registration requests can be sent to <iana@iana.org>.
4.2.3. Designated Expert Review
The primary concern of the designated expert (DE) is preventing name
collisions and encouraging the submitter to document security and
privacy considerations. For a common-use registration, the DE is
expected to confirm that suitable documentation, as described in
Section 4.6 of [RFC8126], is available to ensure interoperability.
That documentation will usually be in an RFC, but simple definitions
are likely to use a web/wiki page, and if a sentence or two is deemed
sufficient, it could be described in the registry itself. The DE
should also verify that the property name does not conflict with work
that is active or already published within the IETF. A published
specification is not required for reserved or obsolete registrations.
The DE will either approve or deny the registration request and
publish a notice of the decision to the Calext WG mailing list or its
successor, as well as inform IANA. A denial notice must be justified
by an explanation, and, in the cases where it is possible, concrete
suggestions on how the request can be modified so as to become
acceptable should be provided.
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4.2.4. Change Procedures
Once a JSContact property has been published by IANA, the change
controller may request a change to its definition. The same
procedure that would be appropriate for the original registration
request is used to process a change request.
JSContact property registrations may not be deleted; properties that
are no longer believed appropriate for use can be declared obsolete
by a change to their "intended usage" field; such properties will be
clearly marked in the IANA registry.
Significant changes to a JSContact property's definition should be
requested only when there are serious omissions or errors in the
published specification, as such changes may cause interoperability
issues. When review is required, a change request may be denied if
it renders entities that were valid under the previous definition
invalid under the new definition.
The owner of a JSContact property may pass responsibility to another
person or agency by informing IANA; this can be done without
discussion or review.
4.2.5. "JSContact Properties" Registry Template
Property Name: This is the name of the property. The property name
MUST NOT already be registered for any of the object types listed
in the "Property Context" field of this registration. Other
object types MAY already have registered a different property with
the same name; however, the same name SHOULD only be used when the
semantics are analogous.
Property Type: This is the type of this property, using type
signatures, as specified in Section 1.3. The property type MUST
be registered in the "JSContact Types" registry.
Property Context: This is a comma-separated list of JSContact object
types this property is allowed on.
Reference or Description: This is a brief description or RFC number
and section reference where the property is specified (omitted for
"reserved" property names).
Intended Usage: This may be "common", "reserved", or "obsolete".
Version: This defines the JSContact specification version on which
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this property definition is based on. The version MUST be one of
the allowed values of the @version property in the JSContact Enum
Value registry (see Table 5).
Change Controller: This is who may request a change to this entry's
definition (IETF for RFCs from the IETF stream).
4.2.6. Initial Contents for the "JSContact Properties" Registry
The following table lists the initial common usage entries of the
"JSContact Properties" registry. All properties are for version
rfc0000. All RFC section references are for this document. The
change controller for all these properties is IETF.
+========================+==================================+================================+============+
|Property Name |Property Type |Property Context |Reference or|
| | | |Description |
+========================+==================================+================================+============+
|@type |String |Address, Anniversary, Author, |Section |
| | |Card, CalendarResource, |2.5.1, |
| | |ContactChannelPreference, |Section |
| | |CryptoResource, |2.8.1, |
| | |DirectoryResource, EmailAddress,|Section |
| | |LanguagePreference, |2.1.1, |
| | |LinkResource, MediaResource, |Section |
| | |Name, NameComponent, NickName, |2.4.1, |
| | |Note, OnlineService, |Section |
| | |Organization, OrgUnit, |2.3.4, |
| | |PartialDate,PersonalInformation,|Section |
| | |Phone, Pronouns, Relation, |2.6.1, |
| | |Resource, SchedulingAddress, |Section |
| | |SpeakToAs, StreetComponent, |2.6.2, |
| | |Timestamp, Title |Section |
| | | |2.3.1, |
| | | |Section |
| | | |2.3.5, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.2.2, |
| | | |Section |
| | | |2.2.3, |
| | | |Section |
| | | |2.8.3, |
| | | |Section |
| | | |2.3.2, |
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| | | |Section |
| | | |2.2.4, |
| | | |Section |
| | | |2.8.4, |
| | | |Section |
| | | |2.3.3, |
| | | |Section |
| | | |2.2.5, |
| | | |Section |
| | | |2.1.8, |
| | | |Section |
| | | |1.4.4, |
| | | |Section |
| | | |2.4.2, |
| | | |Section |
| | | |2.2.6 |
+------------------------+----------------------------------+--------------------------------+------------+
|@version |String |Card |Section |
| | | |2.1.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|address |String |EmailAddress |Section |
| | | |2.3.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|addresses |Id[Address] |Card |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|anniversaries |Id[Anniversary] |Card |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|author |Author |Note |Section |
| | | |2.8.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|calendars |Id[CalendarResource] |Card |Section |
| | | |2.4.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|calendarScale |String |PartialDate |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|components |NameComponent[] |Name |Section |
| | | |2.2.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|contexts |String[Boolean] |Address, NickName, Pronouns, |Section |
| | |EmailAddress, OnlineService, |1.5.1, |
| | |Phone, ContactChannelPreference,|Section |
| | |LanguagePreference, |2.5.1, |
| | |CalendarResource, |Section |
| | |CryptoResource, |2.2.3, |
| | |DirectoryResource, LinkResource,|Section |
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| | |MediaResource, SchedulingAddress|2.2.5, |
| | | |Section |
| | | |2.3.1, |
| | | |Section |
| | | |2.3.2, |
| | | |Section |
| | | |2.3.3, |
| | | |Section |
| | | |2.3.4, |
| | | |Section |
| | | |2.3.5, |
| | | |Section |
| | | |1.4.4, |
| | | |Section |
| | | |2.4.1, |
| | | |Section |
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.4.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|coordinates |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|country |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|countryCode |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|created |UTCDateTime |Card, Note |Section |
| | | |2.1.3, |
| | | |Section |
| | | |2.8.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|date |Timestamp|PartialDate |Anniversary |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|day |UnsignedInt |PartialDate |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|directories |Id[DirectoryResource] |Card |Section |
| | | |2.6.2 |
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+------------------------+----------------------------------+--------------------------------+------------+
|emails |Id[EmailAddress] |Card |Section |
| | | |2.3.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|features |String[Boolean] |Phone |Section |
| | | |2.3.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|fullAddress |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|fullName |String |Card |Section |
| | | |2.2.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|grammaticalGender |String |SpeakToAs |Section |
| | | |2.2.5 |
+------------------------+----------------------------------+--------------------------------+------------+
|keywords |String[Boolean] |Card |Section |
| | | |2.8.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|kind |String |Card |Section |
| | | |2.1.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|label |String |EmailAddress, OnlineService, |Section |
| | |Phone, CalendarResource, |1.5.2, |
| | |CryptoResource, |Section |
| | |DirectoryResource, LinkResource,|2.3.1, |
| | |MediaResource, SchedulingAddress|Section |
| | | |2.3.2, |
| | | |Section |
| | | |2.3.3, |
| | | |Section |
| | | |1.4.4, |
| | | |Section |
| | | |2.4.1, |
| | | |Section |
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.4.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|level |String |PersonalInformation |Section |
| | | |2.8.4 |
+------------------------+----------------------------------+--------------------------------+------------+
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|links |Id[LinkResource] |Card |Section |
| | | |2.6.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|locale |String |Card, Name |Section |
| | | |2.1.5, |
| | | |Section |
| | | |2.2.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|locality |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|localizations |String[PatchObject] |Card |Section |
| | | |2.7.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|media |Id[MediaResource] |Card |Section |
| | | |2.6.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|mediaType |String |CalendarResource, |Section |
| | |CryptoResource, |1.4.4, |
| | |DirectoryResource, LinkResource,|Section |
| | |MediaResource |2.4.1, |
| | | |Section |
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|members |String[Boolean] |Card |Section |
| | | |2.1.6 |
+------------------------+----------------------------------+--------------------------------+------------+
|month |UnsignedInt |PartialDate |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|name |Name |Card |Section |
| | | |2.2.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|name |String |Author, NickName, Organization, |Section |
| | |OrgUnit, Title |2.8.3, |
| | | |Section |
| | | |2.2.3, |
| | | |Section |
| | | |2.2.4, |
| | | |Section |
| | | |2.2.6 |
+------------------------+----------------------------------+--------------------------------+------------+
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|nickNames |Id[NickName] |Card |Section |
| | | |2.2.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|note |String |Note |Section |
| | | |2.8.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|notes |Id[Note] |Card |Section |
| | | |2.8.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|number |String |Phone |Section |
| | | |2.3.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|onlineServices |Id[OnlineService] |Card |Section |
| | | |2.3.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|organization |String |Title |Section |
| | | |2.2.6 |
+------------------------+----------------------------------+--------------------------------+------------+
|organizations |Id[Organization] |Card |Section |
| | | |2.2.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|personalInfo |Id[PersonalInformation] |Card |Section |
| | | |2.8.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|phones |Id[Phone] |Card |Section |
| | | |2.3.3 |
+------------------------+----------------------------------+--------------------------------+------------+
|place |Address |Anniversary |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|postcode |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|pref |UnsignedInt |Address, NickName, Pronouns, |Section |
| | |EmailAddress, OnlineService, |1.5.3, |
| | |Phone, ContactChannelPreference,|Section |
| | |LanguagePreference, |2.5.1, |
| | |CalendarResource, |Section |
| | |CryptoResource, |2.2.3, |
| | |DirectoryResource, LinkResource,|Section |
| | |MediaResource, SchedulingAddress|2.2.5, |
| | | |Section |
| | | |2.3.1, |
| | | |Section |
| | | |2.3.2, |
| | | |Section |
| | | |2.3.3, |
| | | |Section |
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| | | |2.3.4, |
| | | |Section |
| | | |2.3.5, |
| | | |Section |
| | | |1.4.4, |
| | | |Section |
| | | |2.4.1Section|
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.4.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|preferredContactChannels|String[ContactChannelPreference[]]|Card |Section |
| | | |2.3.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|preferredLanguages |String[LanguagePreference[]] |Card |Section |
| | | |2.3.5 |
+------------------------+----------------------------------+--------------------------------+------------+
|prodId |String |Card |Section |
| | | |2.1.7 |
+------------------------+----------------------------------+--------------------------------+------------+
|pronouns |Id[Pronouns] |SpeakToAs |Section |
| | | |2.2.5 |
+------------------------+----------------------------------+--------------------------------+------------+
|pronouns |String |Pronouns |Section |
| | | |2.2.5 |
+------------------------+----------------------------------+--------------------------------+------------+
|rank |UnsignedInt |NameComponent |Section |
| | | |2.2.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|region |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|relatedTo |String[Relation] |Card |Section |
| | | |2.1.8 |
+------------------------+----------------------------------+--------------------------------+------------+
|relation |String[Boolean] |Relation |Section |
| | | |2.1.8 |
+------------------------+----------------------------------+--------------------------------+------------+
|schedulingAddresses |Id[SchedulingAddress] |Card |Section |
| | | |2.4.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|service |String |OnlineService |Section |
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| | | |2.3.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|sortAs |String[String] |Name |Section |
| | | |2.2.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|sortAs |String |Organization, OrgUnit |Section |
| | | |2.2.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|speakToAs |SpeakToAs |Card |Section |
| | | |2.2.5 |
+------------------------+----------------------------------+--------------------------------+------------+
|street |StreetComponent[] |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|timeZone |String |Address |Section |
| | | |2.5.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|titles |Id[Title] |Card |Section |
| | | |2.2.6 |
+------------------------+----------------------------------+--------------------------------+------------+
|type |String |Anniversary, NameComponent, |Section |
| | |Title, CalendarResource, |2.8.1, |
| | |CryptoResource, |Section |
| | |DirectoryResource, LinkResource,|2.2.2, |
| | |MediaResource, OnlineService, |Section |
| | |StreetComponent, |2.2.6, |
| | |PersonalInformation |Section |
| | | |1.4.4, |
| | | |Section |
| | | |2.4.1, |
| | | |Section |
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.3.2, |
| | | |Section |
| | | |2.5.1, |
| | | |Section |
| | | |2.8.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|uid |String |Card |Section |
| | | |2.1.9 |
+------------------------+----------------------------------+--------------------------------+------------+
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|units |OrgUnit[] |Organization |Section |
| | | |2.2.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|updated |UTCDateTime |Card |Section |
| | | |2.1.10 |
+------------------------+----------------------------------+--------------------------------+------------+
|uri |String |Author, CalendarResource, |Section |
| | |CryptoResource, |2.8.3, |
| | |DirectoryResource, LinkResource,|Section |
| | |MediaResource, SchedulingAddress|1.4.4, |
| | | |Section |
| | | |2.4.1, |
| | | |Section |
| | | |2.6.1, |
| | | |Section |
| | | |2.6.2, |
| | | |Section |
| | | |2.6.3, |
| | | |Section |
| | | |2.6.4, |
| | | |Section |
| | | |2.4.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|user |String |OnlineService |Section |
| | | |2.3.2 |
+------------------------+----------------------------------+--------------------------------+------------+
|utc |UTCDateTime |Timestamp |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
|value |String |NameComponent, StreetComponent, |Section |
| | |PersonalInformation |2.2.2, |
| | | |Section |
| | | |2.5.1, |
| | | |Section |
| | | |2.8.4 |
+------------------------+----------------------------------+--------------------------------+------------+
|year |UnsignedInt |PartialDate |Section |
| | | |2.8.1 |
+------------------------+----------------------------------+--------------------------------+------------+
Table 1: Initial Contents of the "JSContact Properties" Registry
The following table lists the initial reserved usage entries of the
"JSContact Properties" registry. All RFC section references are for
this document. The change controller for all these properties is
IETF.
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+===============+============+============+==============+==========+
| Property | Property | Property | Reference or | Intended |
| Name | Type | Context | Description | Usage |
+===============+============+============+==============+==========+
| extra | not | not | Section 1.9 | reserved |
| | applicable | applicable | | |
+---------------+------------+------------+--------------+----------+
Table 2: Initial Contents of the "JSContact Properties" Registry
4.3. Creation of the "JSContact Types" Registry
IANA has created the "JSContact Types" registry to avoid name
collisions and provide a complete reference for all data types used
for JSContact property values. The registration process is the same
as for the "JSContact Properties" registry, as defined in
Section 4.2.
4.3.1. "JSContact Types" Registry Template
Type Name: the name of the type
Reference or Description: a brief description or RFC number and
section reference where the Type is specified (may be omitted for
"reserved" type names)
Intended Usage: common, reserved, or obsolete
Version: This defines the JSContact specification version on which
this type definition is based on. The version MUST be one of the
allowed values of the @version property in the JSContact Enum
Value registry (see Table 5).
Change Controller: who may request a change to this entry's
definition (IETF for RFCs from the IETF stream)
4.3.2. Initial Contents for the "JSContact Types" Registry
The following table lists the initial entries of the JSContact Types
registry. All types are for common use and their version is rfc0000.
All RFC section references are for this document. The change
controller for all these properties is "IETF".
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+==========================+==========================+
| Type Name | Reference or Description |
+==========================+==========================+
| Address | Section 2.5.1 |
+--------------------------+--------------------------+
| Anniversary | Section 2.8.1 |
+--------------------------+--------------------------+
| Author | Section 2.8.3 |
+--------------------------+--------------------------+
| Boolean | Section 1.3 |
+--------------------------+--------------------------+
| CalendarResource | Section 2.4.1 |
+--------------------------+--------------------------+
| Card | Section 2 |
+--------------------------+--------------------------+
| ContactChannelPreference | Section 2.3.4 |
+--------------------------+--------------------------+
| CryptoResource | Section 2.6.1 |
+--------------------------+--------------------------+
| DirectoryResource | Section 2.6.2 |
+--------------------------+--------------------------+
| EmailAddress | Section 2.3.1 |
+--------------------------+--------------------------+
| Id | Section 1.4.1 |
+--------------------------+--------------------------+
| Int | Section 1.4.2 |
+--------------------------+--------------------------+
| LanguagePreference | Section 2.3.5 |
+--------------------------+--------------------------+
| LinkResource | Section 2.6.3 |
+--------------------------+--------------------------+
| MediaResource | Section 2.6.4 |
+--------------------------+--------------------------+
| Name | Section 2.2.2 |
+--------------------------+--------------------------+
| NameComponent | Section 2.2.2 |
+--------------------------+--------------------------+
| NickName | Section 2.2.3 |
+--------------------------+--------------------------+
| Note | Section 2.8.3 |
+--------------------------+--------------------------+
| OnlineService | Section 2.3.2 |
+--------------------------+--------------------------+
| Organization | Section 2.2.4 |
+--------------------------+--------------------------+
| OrgUnit | Section 2.2.4 |
+--------------------------+--------------------------+
| PartialDate | Section 2.8.1 |
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+--------------------------+--------------------------+
| PersonalInformation | Section 2.8.4 |
+--------------------------+--------------------------+
| Phone | Section 2.3.3 |
+--------------------------+--------------------------+
| Pronouns | Section 2.2.5 |
+--------------------------+--------------------------+
| Relation | Section 2.1.8 |
+--------------------------+--------------------------+
| Resource | Section 1.4.4 |
+--------------------------+--------------------------+
| SchedulingAddress | Section 2.4.2 |
+--------------------------+--------------------------+
| SpeakToAs | Section 2.2.5 |
+--------------------------+--------------------------+
| StreetComponent | Section 2.5.1 |
+--------------------------+--------------------------+
| Timestamp | Section 2.8.1 |
+--------------------------+--------------------------+
| Title | Section 2.2.6 |
+--------------------------+--------------------------+
| UnsignedInt | Section 1.4.2 |
+--------------------------+--------------------------+
| UTCDateTime | Section 1.4.5 |
+--------------------------+--------------------------+
Table 3: Initial Contents of the "JSContact Types"
Registry
4.4. Creation of the "JSContact Enum Values" Registry
IANA has created the "JSContact Enum Values" registry to allow
interoperable extension of semantics for properties with enumerable
values. Each such property will have a subregistry of allowed
values. The registration process for a new enum value or adding a
new enumerable property is the same as for the "JSContact Properties"
registry, as defined in Section 4.2.
4.4.1. "JSContact Enum Values" Registry Property Template
This template is for adding a subregistry for a new enumerable
property to the "JSContact Enum" registry.
Property Name: These are the name(s) of the property or properties
where these values may be used. This MUST be registered in the
"JSContact Properties" registry.
Context: This is the list of allowed object types where the property
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or properties may appear, as registered in the "JSContact
Properties" registry. This disambiguates where there may be two
distinct properties with the same name in different contexts.
Version: This defines the JSContact specification version on which
this enum value definition is based on. The version MUST be one
of the allowed values of the @version property in the JSContact
Enum Value registry (see Table 5).
Change Controller: (IETF for properties defined in RFCs from the
IETF stream).
Initial Contents: This is the initial list of defined values for
this enum, using the template defined in Section 4.4.2. A
subregistry will be created with these values for this property
name/context tuple.
4.4.2. "JSContact Enum Values" Registry Value Template
This template is for adding a new enum value to a subregistry in the
JSContact Enum registry.
Enum Value: the verbatim value of the enum
Reference or Description: a brief description or RFC number and
section reference for the semantics of this value
4.4.3. Initial Contents for the "JSContact Enum Values" Registry
For each subregistry created in this section, all RFC section
references are for this document.
Property Name: kind
Context: Card
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+=============+==========================+
| Enum Value | Reference or Description |
+=============+==========================+
| individual | Section 2.1.4 |
+-------------+--------------------------+
| group | Section 2.1.4 |
+-------------+--------------------------+
| org | Section 2.1.4 |
+-------------+--------------------------+
| location | Section 2.1.4 |
+-------------+--------------------------+
| device | Section 2.1.4 |
+-------------+--------------------------+
| application | Section 2.1.4 |
+-------------+--------------------------+
Table 4: JSContact Enum Values for
kind (Context: Card)
Property Name: @version
Context: Card
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| rfc0000 | Section 2.1.2 |
+------------+--------------------------+
Table 5: JSContact Enum Values for
@version (Context: Card)
Property Name: contexts
Context: NickName, Pronouns, EmailAddress, OnlineService,
Phone, ContactChannelPreference,
LanguagePreference, CalendarResource,
CryptoResource, DirectoryResource, LinkResource,
MediaResource, SchedulingAddress
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| private | Section 1.5.1 |
+------------+--------------------------+
| work | Section 1.5.1 |
+------------+--------------------------+
Table 6: JSContact Enum Values for
contexts (Context: NickName,
Pronouns, EmailAddress,
OnlineService, Phone,
ContactChannelPreference,
LanguagePreference, CalendarResource,
CryptoResource, DirectoryResource,
LinkResource, MediaResource,
SchedulingAddress)
Property Name: contexts
Context: Address
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| private | Section 1.5.1 |
+------------+--------------------------+
| work | Section 1.5.1 |
+------------+--------------------------+
| billing | Section 2.5.1 |
+------------+--------------------------+
| postal | Section 2.5.1 |
+------------+--------------------------+
Table 7: JSContact Enum Values for
contexts (Context: Address)
Property Name: features
Context: Phone
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| voice | Section 2.3.3 |
+------------+--------------------------+
| fax | Section 2.3.3 |
+------------+--------------------------+
| pager | Section 2.3.3 |
+------------+--------------------------+
| text | Section 2.3.3 |
+------------+--------------------------+
| cell | Section 2.3.3 |
+------------+--------------------------+
| textphone | Section 2.3.3 |
+------------+--------------------------+
| video | Section 2.3.3 |
+------------+--------------------------+
Table 8: JSContact Enum Values for
features (Context: Phone)
Property Name: type
Context: StreetComponent
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+===============+==========================+
| Enum Value | Reference or Description |
+===============+==========================+
| name | Section 2.5.1 |
+---------------+--------------------------+
| number | Section 2.5.1 |
+---------------+--------------------------+
| apartment | Section 2.5.1 |
+---------------+--------------------------+
| room | Section 2.5.1 |
+---------------+--------------------------+
| extension | Section 2.5.1 |
+---------------+--------------------------+
| direction | Section 2.5.1 |
+---------------+--------------------------+
| building | Section 2.5.1 |
+---------------+--------------------------+
| floor | Section 2.5.1 |
+---------------+--------------------------+
| postOfficeBox | Section 2.5.1 |
+---------------+--------------------------+
| separator | Section 2.5.1 |
+---------------+--------------------------+
| unknown | Section 2.5.1 |
+---------------+--------------------------+
Table 9: JSContact Enum Values for type
(Context: StreetComponent)
Property Name: type
Context: NameComponent
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| prefix | Section 2.2.2 |
+------------+--------------------------+
| given | Section 2.2.2 |
+------------+--------------------------+
| surname | Section 2.2.2 |
+------------+--------------------------+
| middle | Section 2.2.2 |
+------------+--------------------------+
| suffix | Section 2.2.2 |
+------------+--------------------------+
| separator | Section 2.2.2 |
+------------+--------------------------+
Table 10: JSContact Enum Values for
type (Context: NameComponent)
Property Name: type
Context: Title
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| title | Section 2.2.6 |
+------------+--------------------------+
| role | Section 2.2.6 |
+------------+--------------------------+
Table 11: JSContact Enum Values for
type (Context: Title)
Property Name: grammaticalGender
Context: SpeakToAs
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| animate | Section 2.2.5 |
+------------+--------------------------+
| female | Section 2.2.5 |
+------------+--------------------------+
| inanimate | Section 2.2.5 |
+------------+--------------------------+
| male | Section 2.2.5 |
+------------+--------------------------+
| neuter | Section 2.2.5 |
+------------+--------------------------+
Table 12: JSContact Enum Values for
type (Context: SpeakToAs)
Property Name: preferredContactChannels
Context: Card
Change Controller: IETF
Version: rfc0000
Initial Contents:
+================+==========================+
| Enum Value | Reference or Description |
+================+==========================+
| addresses | Section 2.3.4 |
+----------------+--------------------------+
| emails | Section 2.3.4 |
+----------------+--------------------------+
| onlineServices | Section 2.3.4 |
+----------------+--------------------------+
| phones | Section 2.3.4 |
+----------------+--------------------------+
Table 13: JSContact Enum Values for
preferredContactChannels (Context: Card)
Property Name: type
Context: CalendarResource
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| calendar | Section 2.4.1 |
+------------+--------------------------+
| freeBusy | Section 2.4.1 |
+------------+--------------------------+
Table 14: JSContact Enum Values for
type (Context: CalendarResource)
Property Name: type
Context: DirectoryResource
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| directory | Section 2.6.2 |
+------------+--------------------------+
| entry | Section 2.6.2 |
+------------+--------------------------+
Table 15: JSContact Enum Values for
type (Context: DirectoryResource)
Property Name: type
Context: LinkResource
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| contact | Section 2.6.3 |
+------------+--------------------------+
Table 16: JSContact Enum Values for
type (Context: LinkResource)
Property Name: type
Context: MediaResource
Change Controller: IETF
Version: rfc0000
Initial Contents:
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+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| photo | Section 2.6.4 |
+------------+--------------------------+
| sound | Section 2.6.4 |
+------------+--------------------------+
| logo | Section 2.6.4 |
+------------+--------------------------+
Table 17: JSContact Enum Values for
type (Context: MediaResource)
Property Name: type
Context: Anniversary
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| birth | Section 2.8.1 |
+------------+--------------------------+
| death | Section 2.8.1 |
+------------+--------------------------+
| wedding | Section 2.8.1 |
+------------+--------------------------+
Table 18: JSContact Enum Values for
type (Context: Anniversary)
Property Name: type
Context: OnlineService
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| impp | Section 2.3.2 |
+------------+--------------------------+
| uri | Section 2.3.2 |
+------------+--------------------------+
| username | Section 2.3.2 |
+------------+--------------------------+
Table 19: JSContact Enum Values for
type (Context: OnlineService)
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Property Name: type
Context: PersonalInformation
Change Controller: IETF
Version: rfc0000
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| expertise | Section 2.8.4 |
+------------+--------------------------+
| hobby | Section 2.8.4 |
+------------+--------------------------+
| interest | Section 2.8.4 |
+------------+--------------------------+
Table 20: JSContact Enum Values for
type (Context: PersonalInformation)
5. Security Considerations
Contact information is very privacy sensitive. It can reveal the
identity, location and credentials information, employment status,
interests and hobbies, and social network of a user. Its
transmission and storage must be done carefully to protect it from
possible threats, such as eavesdropping, replay, message insertion,
deletion, modification, and on-path attacks.
The data being stored and transmitted may be used in systems with
real-world consequences. For example, a malicious actor might
provide JSContact data that uses the name of another person but
insert their contact details to impersonate the unknown victim. Such
systems must be careful to authenticate all data they receive to
prevent them from being subverted and ensure the change comes from an
authorized entity.
This document only defines the data format; such considerations are
primarily the concern of the API or method of storage and
transmission of such files.
5.1. JSON Parsing
The security considerations of [RFC8259] apply to the use of JSON as
the data interchange format.
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As for any serialization format, parsers need to thoroughly check the
syntax of the supplied data. JSON uses opening and closing tags for
several types and structures, and it is possible that the end of the
supplied data will be reached when scanning for a matching closing
tag; this is an error condition, and implementations need to stop
scanning at the end of the supplied data.
JSON also uses a string encoding with some escape sequences to encode
special characters within a string. Care is needed when processing
these escape sequences to ensure that they are fully formed before
the special processing is triggered, with special care taken when the
escape sequences appear adjacent to other (non-escaped) special
characters or adjacent to the end of data (as in the previous
paragraph).
If parsing JSON into a non-textual structured data format,
implementations may need to allocate storage to hold JSON string
elements. Since JSON does not use explicit string lengths, the risk
of denial of service due to resource exhaustion is small, but
implementations may still wish to place limits on the size of
allocations they are willing to make in any given context, to avoid
untrusted data causing excessive memory allocation.
5.2. URI Values
Several JSContact properties contain URIs as values, and processing
these properties requires extra care. Section 7 of [RFC3986]
discusses security risks related to URIs.
Fetching remote resources carries inherent risks. Connections must
only be allowed on well-known ports, using allowed protocols
(generally, just HTTP/HTTPS on their default ports). The URL must be
resolved externally and not allowed to access internal resources.
Connecting to an external source reveals IP (and therefore often
location) information.
A maliciously constructed JSContact object may contain a very large
number of URIs. In the case of published address books with a large
number of subscribers, such objects could be widely distributed.
Implementations should be careful to limit the automatic fetching of
linked resources to reduce the risk of this being an amplification
vector for a denial-of-service attack.
6. References
6.1. Normative References
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[RFC1034] Mockapetris, P., "Domain names - concepts and facilities",
STD 13, RFC 1034, DOI 10.17487/RFC1034, November 1987,
<https://www.rfc-editor.org/info/rfc1034>.
[RFC1035] Mockapetris, P., "Domain names - implementation and
specification", STD 13, RFC 1035, DOI 10.17487/RFC1035,
November 1987, <https://www.rfc-editor.org/info/rfc1035>.
[RFC2046] Freed, N. and N. Borenstein, "Multipurpose Internet Mail
Extensions (MIME) Part Two: Media Types", RFC 2046,
DOI 10.17487/RFC2046, November 1996,
<https://www.rfc-editor.org/info/rfc2046>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC2234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, DOI 10.17487/RFC2234,
November 1997, <https://www.rfc-editor.org/info/rfc2234>.
[RFC4122] Leach, P., Mealling, M., and R. Salz, "A Universally
Unique IDentifier (UUID) URN Namespace", RFC 4122,
DOI 10.17487/RFC4122, July 2005,
<https://www.rfc-editor.org/info/rfc4122>.
[RFC5646] Phillips, A., Ed. and M. Davis, Ed., "Tags for Identifying
Languages", BCP 47, RFC 5646, DOI 10.17487/RFC5646,
September 2009, <https://www.rfc-editor.org/info/rfc5646>.
[RFC5870] Mayrhofer, A. and C. Spanring, "A Uniform Resource
Identifier for Geographic Locations ('geo' URI)",
RFC 5870, DOI 10.17487/RFC5870, June 2010,
<https://www.rfc-editor.org/info/rfc5870>.
[RFC6350] Perreault, S., "vCard Format Specification", RFC 6350,
DOI 10.17487/RFC6350, August 2011,
<https://www.rfc-editor.org/info/rfc6350>.
[RFC6351] Perreault, S., "xCard: vCard XML Representation",
RFC 6351, DOI 10.17487/RFC6351, August 2011,
<https://www.rfc-editor.org/info/rfc6351>.
[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>.
[RFC7493] Bray, T., Ed., "The I-JSON Message Format", RFC 7493,
DOI 10.17487/RFC7493, March 2015,
<https://www.rfc-editor.org/info/rfc7493>.
[RFC7529] Daboo, C. and G. Yakushev, "Non-Gregorian Recurrence Rules
in the Internet Calendaring and Scheduling Core Object
Specification (iCalendar)", RFC 7529,
DOI 10.17487/RFC7529, May 2015,
<https://www.rfc-editor.org/info/rfc7529>.
[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>.
[RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for
Writing an IANA Considerations Section in RFCs", BCP 26,
RFC 8126, DOI 10.17487/RFC8126, June 2017,
<https://www.rfc-editor.org/info/rfc8126>.
[RFC8141] Saint-Andre, P. and J. Klensin, "Uniform Resource Names
(URNs)", RFC 8141, DOI 10.17487/RFC8141, April 2017,
<https://www.rfc-editor.org/info/rfc8141>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8259] Bray, T., Ed., "The JavaScript Object Notation (JSON) Data
Interchange Format", STD 90, RFC 8259,
DOI 10.17487/RFC8259, December 2017,
<https://www.rfc-editor.org/info/rfc8259>.
6.2. Informative References
[RFC3261] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
A., Peterson, J., Sparks, R., Handley, M., and E.
Schooler, "SIP: Session Initiation Protocol", RFC 3261,
DOI 10.17487/RFC3261, June 2002,
<https://www.rfc-editor.org/info/rfc3261>.
[RFC3339] Klyne, G. and C. Newman, "Date and Time on the Internet:
Timestamps", RFC 3339, DOI 10.17487/RFC3339, July 2002,
<https://www.rfc-editor.org/info/rfc3339>.
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[RFC3966] Schulzrinne, H., "The tel URI for Telephone Numbers",
RFC 3966, DOI 10.17487/RFC3966, December 2004,
<https://www.rfc-editor.org/info/rfc3966>.
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, DOI 10.17487/RFC3986, January 2005,
<https://www.rfc-editor.org/info/rfc3986>.
[RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data
Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006,
<https://www.rfc-editor.org/info/rfc4648>.
[RFC5322] Resnick, P., Ed., "Internet Message Format", RFC 5322,
DOI 10.17487/RFC5322, October 2008,
<https://www.rfc-editor.org/info/rfc5322>.
[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>.
[RFC8499] Hoffman, P., Sullivan, A., and K. Fujiwara, "DNS
Terminology", BCP 219, RFC 8499, DOI 10.17487/RFC8499,
January 2019, <https://www.rfc-editor.org/info/rfc8499>.
[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
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Robert Stepanek
Fastmail
PO Box 234, Collins St West
Melbourne VIC 8007
Australia
Email: rsto@fastmailteam.com
Mario Loffredo
IIT-CNR
Via Moruzzi,1
56124 Pisa
Italy
Email: mario.loffredo@iit.cnr.it
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