JSContact: A JSON representation of contact data

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 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 and extensions (, , , , ). 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 , which is a strict subset of the JavaScript Object Notation (JSON) Data Interchange Format . Using JSON is mostly a pragmatic choice: its widespread use makes JSCard easier to adopt, and the availability of production-ready JSON implementations eliminates a whole category of parser-related interoperability issues.

The xCard and jCard 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.

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 when, and only when, they appear in all capitals, as shown here.

Vendors MAY add additional properties to JSContact objects to support their custom features. The names of these properties MUST be prefixed with a domain name controlled by the vendor to avoid conflict, e.g. "example.com/customprop". Some JSContact properties allow vendor-specific value extensions. If so, vendor-specific values MUST be prefixed with a domain name controlled by the vendor, e.g. "example.com/customrel". Vendors are strongly encouraged to register any new property values or extensions that are useful to other systems as well, rather than using a vendor-specific prefix.

MIME type: application/jscontact+json;type=jscard A JSCard object stores information about a person, organization or company.

Type: String (mandatory). An identifier, used to associate the object as the same across different systems, addressbooks and views. describes a range of established algorithms to generate universally unique identifiers (UUID), and the random or pseudo-random version is recommended. For compatibility with UIDs, implementations MUST accept both URI and free-form text.

Type: String (optional). The identifier for the product that created the JSCard object.

Type: String (optional). The date and time when the data in this JSCard object was last modified. The timestamp MUST be formatted as specified in .

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: individual: a single person org: an organization location: a named location device: a device, such as appliances, computers, or network elements application: a software application

Type: String[Relation] (optional). Relates the object to other JSCard objects. This is represented as a map of the URI (or single text value) of the related objects to a possibly empty set of relation types. The Relation object has the following properties: 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 type parameter values, or an IANA-registered value, or a vendor-specific value. The value for each key in the set MUST be true. Note, the Relation object only has one property; it is specified as an object with a single property to allow for extension in the future.

Type: LocalizedString (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.

Type: NameComponent[] (optional). The name components of the name of the entity represented by this JSCard. Name components SHOULD be ordered such that their values joined by whitespace produce a valid full name of this entity. A NameComponent has the following properties: 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: prefix. The value is a honorific title(s), e.g. "Mr", "Ms", "Dr". personal. The value is a personal name(s), also known as "first name", "given name". surname. The value is a surname, also known as "last name", "family name". additional. The value is an additional name, also known as "middle name". suffix. The value is a honorific suffix, e.g. "B.A.", "Esq.". nickname. The value is a nickname.

Type: LocalizedString[] (optional). The company or organization name and units associated with this card. The first entry in the list names the organization, and any following entries name organizational units.

Type : LocalizedString[] (optional). The job title(s) or functional position(s) of the entity represented by this card.

Type : LocalizedString[] (optional). The role(s), function(s) or part(s) played in a particular situation by the entity represented by this card. In contrast to a job title, the roles might differ for example in project contexts.

Type: Resource[] (optional). An array of Resource objects where the values are URLs in the mailto scheme or free-text email addresses. The default value of the type property is email. If set, the type MUST be email or other.

Type: Resource[] (optional). An array of Resource objects where the values are URIs scheme or free-text phone numbers. Typical URI schemes are the tel or sip schemes, but any URI scheme is allowed. Types are: voice The number is for calling by voice. fax The number is for sending faxes. pager The number is for a pager or beeper. other The number is for some other purpose. A label property MAY be included to display next to the number to help the user identify its purpose.

Type: Resource[] (optional). An array of Resource objects where the values are URIs or usernames associated with the card for online services. Types are: uri The value is a URI, e.g. a website link. username The value is a username associated with the entity represented by this card (e.g. for social media, or an IM client). A label property SHOULD be included to identify what service this is for. For compatibility between clients, this label SHOULD be the canonical service name, including capitalisation. e.g. Twitter, Facebook, Skype, GitHub, XMPP. other The value is something else not covered by the above categories. A label property MAY be included to display next to the number to help the user identify its purpose.

Type: File[] (optional). An array of File objects that contain photographs or images associated with this card. A typical use case is to include an avatar for display along the contact name. A File object has the following properties: href: String (mandatory). A URI where to fetch the data of this file. mediaType: String (optional). The content-type of the file, if known. size: UnsignedInt (optional). The size, in octets, of the file when fully decoded (i.e., the number of octets in the file the user would download), if known. isPreferred: Boolean (optional, default: false). Whether this file is preferred as photo for this card. This SHOULD only be one.

Type : String (optional) Defines the preferred contact method or resource with additional information about this card. The value MUST be the property name of one of the Resource lists: emails, phones, online.

Type : String[ContactLanguage[]] (optional) Defines the preferred languages for contacting the entity associated with this card. The keys in the object MUST be language tags. The values are a (possibly empty) list of contact language preferences for this language. Also see the definition of the VCARD LANG property (Section 6.4.4., ). A ContactLanguage object has the following properties: type: String (optional). Defines the context of this preference. This could be work, home or another value. preference: Number (optional). Defines the preference order of this language for the context defined in the type property. If set, the property value MUST be between 1 and 100 (inclusive). Lower values correspond to a higher level of preference, with 1 being most preferred. If not set, the default MUST be to interpret the language as the least preferred in its context. Preference orders SHOULD be unique across language for a specific type. A valid ContactLanguage object MUST have at least one of its properties set.

Type: Address[] (optional). An array of Address objects, containing physical locations. An Address object has the following properties: context: String (optional, default other). Specifies the context of the address information. The value MUST be either one of the following values, registered in a future RFC, or a vendor-specific value: private An address of a residence. work An address of a workplace. billing An address to be used for billing. postal An address to be used for delivering physical items. other An address not covered by the above categories. label: String (optional). A label describing the value in more detail. fullAddress: LocalizedString (optional). The complete address, excluding type and label. This property is mainly useful to represent addresses of which the individual address components are unknown, or to provide localized representations. street: String (optional). The street address. This MAY be multiple lines; newlines MUST be preserved. extension: String (optional) The extended address, such as an apartment or suite number, or care-of address. 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. postOfficeBox: String (optional) The post office box. 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 "geo:" URI for the address. timeZone: String (optional) Identifies the time zone this address is located in. This SHOULD be a time zone name registered in the IANA Time Zone Database. Unknown time zone identifiers MAY be ignored by implementations. isPreferred: Boolean (optional, default: false). Whether this Address is the preferred for its type. This SHOULD only be one per type.

Type : Anniversary[] (optional). 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 the anniversary. This RFC predefines the following types, but implementations MAY use additional values: birth: a birth day anniversary death: a death day anniversary other: an anniversary not covered by any of the known types. label: String (optional). A label describing the value in more detail, especially if the type property has value other (but MAY be included with any type). date: String (mandatory). The date of this anniversary, in the form "YYYY-MM-DD" (any part may be all 0s for unknown) or a timestamp. place: Address (optional). An address associated with this anniversary, e.g. the place of birth or death.

Type: PersonalInformation[] (optional). A list of personal information about the entity represented by this card. A PersonalInformation object has the following properties: type: String (mandatory). Specifies the type for this personal information. Allowed values are: expertise: a field of expertise or credential hobby: a hobby interest: an interest other: an information not covered by the above categories 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. Allowed values are: high, medium and low.

Type: LocalizedString[] (optional). Arbitrary notes about the entity represented by this card.

Type: String[Boolean] (optional). The set of free-text or URI categories that relate to the card. The set is represented as an object, with each key being a category. The value for each key in the object MUST be true.

MIME type: application/jscontact+json;type=jsgroupcard A JSGroupCard object represents a group of cards. Its members may be JSCards or JSGroupCards. Both JSGroupCard and JSCard share the same namespace for the uid property. All properties for a JSCard are also defined for JSGroupCard, with the exception that the kind property MUST be set to group.

Type: String[Boolean] (mandatory). The members of this group. The set is represented as an object, with each key being the uid of another JSCard or JSGroupCard. The value for each key in the object MUST be true.

A LocalizedString object has the following properties: value: String (mandatory). The property value. language: String (optional). The language tag of this value, if any. localizations: String[String] (optional). A map from language tags to the value localized in that language.

A Resource object has the following properties: context: String (optional) Specifies the context in which to use this resource. Pre-defined values are: private: The resource may be used to contact the card holder in a private context. work: The resource may be used to contact the card holder in a professional context. other: The resource may be used to contact the card holder in some other context. A label property MAY be help to identify its purpose. type: String (optional). Specifies the property-specific variant of the resource. This MUST be taken from the set of allowed types specified in the respective contact method property. labels: String[Boolean] (optional). A set of labels that describe the value in more detail, especially if the type property has value other (but MAY be included with any type). The keys in the map define the label, the values MUST be true. value: String (mandatory). The actual resource value, e.g. an email address or phone number. mediaType: String (optional). Used for properties with URI values. Provides the media type of the resource identified by the URI. isPreferred: Boolean (optional, default: false). Whether this resource is the preferred for its type. This SHOULD only be one per type.

NOTE: Please remove this section and the reference to 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 . 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 , "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".

Responsible Organization: Institute of Informatics and Telematics of National Research Council (IIT-CNR)/Registro.it Location: 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 does not implement any security policy because data returned by this server are only for experimental testing purposes. The RDAP server returns responses including JSCard in place of jCard when queries contain the parameter jscard=1. Level of Maturity: This is a "proof of concept" research implementation. Coverage: This implementation includes all of the features described in this specification. Contact Information: Mario Loffredo, mario.loffredo@iit.cnr.it

TBD