Internet-Draft JSON vCon September 2026
Petrie Expires 11 March 2027 [Page]
Workgroup:
Virtualized Conversations
Internet-Draft:
draft-ietf-vcon-vcon-core-04
Published:
Intended Status:
Standards Track
Expires:
Author:
D. G Petrie
SIPez LLC

The JSON format for vCon - Conversation Data Container

Abstract

vCon is a standardized framework for the exchange of conversational data. Conversations, which may involve one or more participants, occur across a wide variety of modes and application platforms. This document defines a JSON format for representing conversational data, encompassing metadata, conversation media, related documents, and analysis. The goal of this standard is to provide an abstracted, platform-independent data format for conversations, regardless of the mode or application platform. By doing so, it facilitates the integration and seamless exchange of conversational data across application platforms, enterprises, and trust boundaries.

About This Document

This note is to be removed before publishing as an RFC.

The latest revision of this draft can be found at https://ietf-wg-vcon.github.io/draft-ietf-vcon-vcon-core/draft-ietf-vcon-vcon-core.html. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-ietf-vcon-vcon-core/.

Discussion of this document takes place on the Virtualized Conversations Working Group mailing list (mailto:vcon@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/vcon/. Subscribe at https://www.ietf.org/mailman/listinfo/vcon/.

Source for this draft and an issue tracker can be found at https://github.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core.

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 11 March 2027.

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Table of Contents

1. Introduction

This document specifies the vCon (Conversational Data Exchange) standard, which defines a unified format for representing and exchanging conversational data across different communication platforms and modalities. The goal of vCon is to provide a standardized, platform-agnostic structure for capturing and sharing conversational information, allowing for seamless integration between systems, enterprises, and trust boundaries.

1.1. Purpose of vCon

The vCon standard enables the abstraction of conversation data, making it easier to integrate communication platforms with external services, including post-conversation analysis tools, customer support systems, and business intelligence platforms. By defining a consistent data format, vCon ensures interoperability across various platforms, regardless of the communication mode - whether text, audio, video, or other formats.

The vCon format captures the essential components of a conversation, including metadata, media content, related documents, and post-conversation analysis. This abstraction simplifies data exchange, enables AI-driven analysis, and supports model training and testing.

1.2. Extending the vCon Schema

In addition to the core vCon schema, this document provides a framework for extending the vCon format to support specialized use cases. The vCon schema can be customized to address the needs of specific industries or applications, such as:

  • Contact Centers: Adding specific metadata related to customer service interactions, case management, and priority tracking.

  • Messaging Platforms: Supporting the integration of different message formats, including SMS, email, and chat, group concepts, along with platform-specific information.

  • ECRIT (Emergency Communication) Centers: Extending the schema to capture critical data such as location, urgency, and incident details for emergency communications.

The ability to add extensions ensure that vCon remains flexible and adaptable, enabling its use in a wide range of domains while maintaining a consistent format for data exchange.

1.3. Benefits of vCon

The vCon standard offers several key benefits:

  • Interoperability: A consistent data format for conversational data facilitates integration across diverse platforms and systems.

  • AI-Driven Analysis: By capturing data in a structured format, vCon enables the application of AI analysis such as sentiment analysis, categorization, transcription, and decision-making.

  • Data Automation: The vCon format simplifies the automation of processes involving conversational data, improving efficiency and reducing the risk of errors.

  • Enterprise Integration: The ability to integrate conversation data with third-party tools and services enhances the value of conversations by providing deeper insights and driving business decisions.

1.4. Scope of the Document

This document defines the core structure and schema for vCon as a JSON format. Detailed specifications for the various parameters and the extension framework will be provided in subsequent sections. The primary focus is on creating a flexible, extensible standard for the exchange of conversational data that can be easily adopted across industries, use cases, and communication technologies.

2. Conventions and Definitions

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.

2.1. Terminology

  • analysis - analysis, transformations, summary, sentiment, or translation typically of the dialog data

  • conversation - an exchange of communication using text, audio or video medium between at least one human and one or more bots or humans

  • de-identification - removal of all information that could identify a party in a conversation. This includes PII as well as audio and video recordings. Voice recordings might be re-vocalized with a different speaker.

  • dialog - the captured conversation in its original form (e.g. text, audio or video)

  • encrypted form - encrypted JWE document with the JWS signed vCon form contained in the ciphertext

  • file - a data block either included or referenced in a vCon

  • object - JSON object containing key and value pairs

  • parameter - JSON key and value pair

  • party - an observer or participant to the conversation, either passive or active

  • payload - the contents or bytes that make up a file

  • PII - Personal Identifiable Information

  • PII masked - may include voice recordings, but PII is removed from transcripts and recordings (audio and video).

  • vCon - container for conversational information

  • vCon instance - a vCon populated with data for a specific conversation

  • vCon instance version - a single version of an instance of a conversation, which may be modified to redact or amend additional information forming a subsequent vCon instance version

  • vCon syntax version - the version for the data syntax used for form a vCon

  • signed form - JWS signed document with the unsigned vCon form contained in the payload

2.2. JSON Notation

For the ease of documentation, the convention for [JSON] notation used in this document is copied from sections 1.1-1.5 of [JMAP].

  • Date - A string that MUST have the form of an [RFC3339] date string as defined for the Date type in section 1.4 of [JMAP].

  • "*" - The type is undefined; the value can be any JSON type, although permitted values may be constrained by the context of the value, as defined in section 1.1 of [JMAP].

  • "String" - a JSON string type.

  • "UnsignedInt" - a positive JSON integer as defined in section 1.3 of [JMAP].

  • "UnsignedFloat" - a positive JSON floating point number containing a decimal point as defined in section 6 of [JSON].

  • "Mediatype" - A "String" value that MUST be of the following form as defined in section 5.1 of [MIME]:

    type "/" subtype

  • "ContentHash" - The string token value is generated using the same approach used in section 6 of [STIR-PASS]. The relevant text is copied here for convenience and to remove the normative dependency. The hash string token values are formed from combining a string that defines the crypto algorithm used to generate the digest along with the Base64Url Encoded value of the SHA-512 hash, as defined in section 6.3 and 6.4 [SHA-512], of the body of the content at the given url. The hash algorithm is identified by "sha512". SHA-512 is part of the SHA-2 set of cryptographic hash functions [SHA-512] defined by the US National Institute of Standards and Technology (NIST). Implementations MAY support additional recommended hash algorithms in [IANA-COSE-ALG]; that is, the hash algorithm has "Yes" in the "Recommended" column of the IANA registry. Hash algorithm identifiers MUST use only lowercase letters, and they MUST NOT contain hyphen characters. The character following the algorithm string MUST be a hyphen character, "-", or ASCII 45. The subsequent characters are the Base64Url encoded (see Section 2 [JWS]) digest of a canonicalized and concatenated string or binary data based on the JSON pointer referenced elements of "rcd" claim or the URI referenced content contained in the claim.

  • "SessionId" - An object with the String parameters: "local" and "remote". The String values of these parameters are UUIDs as defined in section 5 of [SESSION-ID] as "local-uuid" and "remote-uuid". This is designed to also work with the H.323 correlated [H-460-27] which refers to them as "Sender-UUID" and "Recipient-UUID".

    { "local": String, "remote": String }

  • "A[]" and array of values of type A.

All parameters are assumed to be mandatory unless otherwise noted.

Objects or arrays with no or null values MAY be excluded from the vCon.

2.3. Inline Files

Objects that contain a file or data inline (i.e. within the vCon) MUST have the parameters: body and encoding. JSON does not support binary data values. For this reason inline files MUST be Base64url (see Section 2 [JWS]) encoded to be included as a valid JSON string value if they are not already valid JSON strings.

2.3.1. body

The body parameter contains the payload of the file to be included inline. Depending upon the data in the file, it may require encoding to be represented as a valid JSON value.

  • body: "*"

2.3.2. encoding

The encoding parameter describes the type of encoding, if any, that was performed to represent the file payload as the value of the body parameter. If the body parameter is provided and is not an empty string, the encoding parameter MUST be provided. In the interest of being tolerant for interoperability, if the encoding value is not provided, applications can attempt to derive the encoding token value based upon the mediatype parameter or filename extension if either is provided.

  • encoding: "String"

This MUST be one of the following strings:

  • "base64url": The payload of the file has been Base64Url encoded and provided as the string value of the body parameter.

  • "json": The value of the body parameter is a JSON value (object, array, number, string, or one of the literals true, false, or null) as defined in [JSON].

  • "none": The payload of the file is a valid JSON string and can be included without modification as the string value to the body parameter.

2.4. Externally Referenced Files

Files and data stored externally from the vCon MUST be "signed" to ensure that they have not been modified. Objects that refer to a file which is externally stored from the vCon MUST have the parameters: url, content_hash. These parameters are defined in the following subsections. The values and format of the hashes are defined in Section 2.2 type: ContentHash. The use of [SHA-512] hash for ensuring that the externally referenced data or file has not been modified, is defined in this document. Other methods of ensuring integrity may be added in the future.

2.4.1. url

The url value contains the [HTTPS] URL where the externally referenced file is stored. HTTPS MUST be used for retrieval to protect the privacy of the contents of the file.

  • url: "String"

2.4.2. content_hash

The integrity of externally referenced files are protected using a hash of the external content. The algorithm and hash value are contained in the content_hash parameter. The value of the content_hash can be a single token or an array of tokens if multiple hash algorithms are desired to be provided. The SHA-512 [SHA-512] algorithm MUST be supported. Other algorithms MAY be included. The algorithm used for signing the externally referenced file is defined in section 6.3 and 6.4 of [SHA-512].

  • content_hash: "ContentHash" | "ContentHash[]"

2.5. Extending vCon

vCon provides a means to extend the schema defined in this document. A vCon extension can define new parameters at any level of the schema. It can also redefine the semantics of or deprecate existing parameters. A vCon extension is defined in its own document. In addition to the standard sections of an Internet-Draft, a vCon extension document MUST also contain the following sections.

  • Extension Name: State the registered extensions token name for the extension. State whether and under what conditions the name appears in the extensions (Section 4.1.3) parameter, the critical (Section 4.1.4) parameter, or both. This is the name registered in the vCon Extensions Names Registry (Section 6.4) and the name against which implementations determine whether they support the extension.

  • Parameter Definitions: Define each new parameter, the level of the schema at which it appears, its value type, and its semantics. For any existing parameter whose meaning or permitted values are redefined, state the new semantics and values. For any deprecated parameter, state what is to be used in its stead and the migration approach. Use the snake case naming convention for all parameter names, as opposed to camel case. Register each new parameter in the appropriate Object registry with IANA.

  • Compatibility Considerations: Describe how the extension behaves in the presence of implementations that do not support it. Identify the parameters and semantics the extension introduces or changes, and explain for each why an implementation that does not recognize the extension can continue to process the vCon correctly by ignoring the additions, or state the conditions under which that holds. An extension that is Compatible under all conditions states so explicitly and justifies that claim.

  • Incompatibility Considerations: Demonstrate either that the extension introduces no incompatibilities, or enumerate each incompatibility that it does introduce. For each incompatibility, state the processing that is affected, for example redaction versus transcription, whether the extension name is therefore required in the critical (Section 4.1.4) parameter, and the behavior required of implementations that do not support the extension. An extension that claims to be Compatible uses this section to show why no incompatibility exists.

  • Privacy and Integrity Considerations: Describe how the extension's parameters interact with redaction and de-identification, including whether any of them can carry party-identifying data or PII and how a redactor is expected to handle them. State whether the extension introduces any new external content references, and if so, the integrity mechanism that protects them, such as Section 2.4.2.

Extensions to the vCon schema can be classified into two categories:

  • Compatible: These extensions introduce additional data or fields without altering the meaning or structure of existing elements. Implementations that do not recognize these extensions can safely ignore them while maintaining valid processing of the vCon.

  • Incompatible: These extensions modify existing semantics or schema definitions in ways that render a vCon incompatible with implementations that do not support the extension. Interpreting such a vCon correctly requires explicit awareness of the extension.

Wherever feasible, extensions SHOULD be designed as Compatible to preserve compatibility with existing implementations. The question of Compatible vs Incompatible is a little subjective. A transcriber for vCon can be fairly tolerant of changes adding new parameters or objects to a vCon. On the other hand, a redactor must be aware of the implications of all parameters in the vCon to be sure to redact all of the objective information. In these cases a transcriber will likely only need to look at the critical extensions. However the redactor perhaps should reject vCons with any extension that it does not support.

However, when disruptive extensions are necessary, the names of all such extensions MUST be listed in the critical (Section 4.1.4) parameter of the vCon. This allows implementations to determine whether they are capable of processing the vCon safely and accurately.

Implementations that encounter a vCon containing a disruptive extension listed in the critical parameter, but do not support that extension, MUST NOT process the vCon except to reject it or notify the user.

3. vCon JSON Object

The JSON form of a vCon is contained in a JSON object in one of three forms:

The unsigned form of the vCon has a single top level object. This top level vCon object is also contained as described in the signed (Section 5.2) and encrypted (Section 5.3) forms of the vCon. The selection of the JSON format enables interchange between application and lower layers of the network stack, critical for enablement of analysis of conversations. The signed form of vCon is defined in Section 5.2 using [JWS] to provide integrity and proof of the conversation data. The encrypted form of vCon is defined in Section 5.3 using [JWE] to provide complete privacy of the conversational data. Partial privacy or data minimization can be provide for a vCon using the Section 4.1.8 construct.

4. Unsigned Form of vCon Object

The unsigned form of the top level vCon object is necessary as in many cases, a vCon will be partially constructed and in process as conversation data is collected. This may change while the conversation is in progress or on-going. The vCon may start with only meta data and party information, then progress to contain dialog information. It may then get analysis added or it could be passed to another security domain for analysis. A vCon in the unsigned form SHOULD contain at least one of the parties, dialog, analysis or attachments parameters.

A vCon may be constructed across several security domains. When a vCon is to be exported from one security domain to another, it SHOULD be signed or encrypted by the domain that constructed it. The subsequent domain may have need to redact or amend data to the vCon. Alternatively the originating domain may want to redact the vCon before providing it to an other domain. The second or subsequent domain, MAY modify the prior vCon instance version and when complete or exporting to another security domain, it SHOULD sign or encrypt the new vCon instance version. The new vCon instance version SHOULD refer to the prior vCon instance version via the redacted (Section 4.1.8) or amended (Section 4.1.9) parameters.

4.1. vCon JSON Object Keys and Values

The keys and values for the top level vCon JSON object are defined in the following subsections.

4.1.1. vcon

The "vcon" parameter is DEPRECATED as of the publication of this document as an RFC. The "vcon" parameter was used to differentiate schema changes to the vCon core container when incompatibilities were created in Internet-Draft versions. The extension mechanism replaces the need for schema versioning. The vcon parameter was used to contain the syntactic version of the JSON format used in the vCon. (see Non-Upward Compatible Changes to the vCon Container (Section 7))

  • vcon: "String"

For syntax defined in this document, the string MUST have the value: "0.4.0"

4.1.2. uuid

The [UUID] for the vCon is used to refer to it when privacy or security may not allow for inclusion or URL reference to a vCon. The UUID value MUST be globally unique. All vCon documents MUST have the uuid parameter and value set.

  • uuid: "String"

The value of the string SHOULD be generated using the version 8 UUID defined in [UUID] which is generated identically to a version 7 UUID with the exception that:

  • rand_b/custom_c is generated from the high 62 bits of the SHA-1 hash of the FQHN string

  • the variant and version fields are set as described for version 8 UUID

The DNS name string used in generating the uuid value SHOULD be the same FQHN, or a subdomain to allow for more distributed generation of UUIDs, as would used in the signing certificate as they are the same domains of uniqueness.

4.1.3. extensions

The vCon schema can be extended through the definition of new extensions. The extensions parameter SHOULD contain the list of names of all vCon extensions for any parameters used that are not defined in this core vCon schema document.

  • extensions: "String[]"

4.1.4. critical

Implementations that include extensions which are incompatible with the core vCon schema MUST list the names of those extensions in the critical parameter. A vCon that includes a critical parameter indicates that correct interpretation of the vCon requires explicit support for the listed extensions. An implementation that does not recognize or support the extensions listed in the critical parameter MUST NOT attempt to process or operate on the vCon, except to reject it or report unsupported content.

  • critical: "String[]"

4.1.5. created_at

The created_at parameter provides the creation time of this vcon, which MUST be present, and should not change once the vcon object is created.

  • created_at: "Date"

4.1.6. updated_at

The updated_at parameter provides the last modified time of this vcon, which MAY be present. For unsigned forms, the updated_at of the vcon object SHOULD be updated as it is modified. For signed forms of the vCon object, the updated_at contains the time when this vcon was last signed. Future updates MUST first set the updated_at to the new signing time as the vcon object is signed again.

  • updated_at: "Date"

4.1.7. subject

The subject or the topic of the conversation is provided in the subject parameter. This parameter is optional as not all conversations have a defined subject. Email threads and prescheduled calls and video conferences typically have a subject which can be captured here. The subject may also be derived from analysis of the dialog.

  • subject: "String" (optional)

The string value of the subject parameter is a free formed JSON string with no constrained syntax.

4.1.8. redacted

A redacted vCon SHOULD provide a reference to the unredacted or prior, less redacted, vCon instance version of itself. The purpose of the Redacted Object (Section 4.1.8.1) is to provide the reference to the unredacted or less redacted version of the vCon from which this vCon was derived. For privacy reasons, it may be necessary to redact a vCon to construct another vCon without the PII. This allows the non-PII portion of the vCon to still be analyzed or used in a broader scope. The Redacted Object (Section 4.1.8.1) SHOULD contain the uuid parameter and MAY include the url, content_hash parameters (see Externally Referenced Files (Section 2.4)). If a reference to the unredacted vCon is provided in the url parameter, the access to that URL MUST be restricted to only those who should be allowed to see the identity or PII for the redacted vCon.

The method(s) for redaction of text, audio and video can be done with existing post processing of media. The method of redaction is out of scope of this document. The assurance of the accuracy of the redaction is made by the entity that creates the redaction which SHOULD sign the redacted version of the vCon.

All data and parameters in the prior, less redacted, vCon instance version are either:

  • Removed entirely in the redacted version

  • Copied and partially redacted

  • Copied as is

Data which is to be completely removed from the redacted version, that is contained in a JSON array in the unredacted vCon, SHOULD create an empty placeholder such that object array indices do not change for the rest of the elements of the array.

  • redacted: "Redacted" (optional, mutually exclusive with amended parameter)

4.1.8.1. Redacted Object

A Redacted Object contains the following parameters:

  • uuid: "String"

The value contains the uuid string value (Section 4.1.2) of the unredacted/prior vCon instance version. The absence of a value for uuid indicates that the less redacted version of this vCon is not available or does not exist.

  • type: "String"

The value of the redacted type parameter is used to indicate the type of redaction that was performed on this vCon relative to the less redacted version referenced by the redacted uuid parameter. This should indicate the type of information that was redacted.

The the location of the referenced vCon MAY be provided as defined in Externally Referenced Files (Section 2.4) by including url and content_hash. content_hash MUST be included if url is provided.

  • url: "String"

  • content_hash: "ContentHash" | "ContentHash[]"

The following diagram illustrates an example partial JSON object tree for a redacted vCon. The top level object is a JWS signed vCon which contains a vCon in the unsigned form in the payload parameter. The second level object is the redacted vcon which refers to the encrypted unredacted vCon in it's redacted parameter. Note that the redacted vCon references the JWE encrypted vCon by UUID and may reference it by URL. The JWE encrypted unredacted vCon contains the signed version of the unredacted vCon in the ciphertext parameter. The signed unredacted vCon contains the unredacted vCon in the unsigned form in it's payload parameter.

                --------------
Signed          | JWS   uuid-|-- redacted vCon uuid in header
redacted vCon:  |            |
                |    payload-|-- unsigned redacted vCon in
                -------------- / payload parameter
                              /
            -------------    /
vCon which  |vCon       |<---
has been    |           |
redacted:   |  redacted-|-- Redacted Object
            ------------- / refers to JWE
                         / encrypted unredacted vCon
                        /
                       /
                      /
                     /
                    / ---------------   signed unredacted vCon
                    ->| JWE    uuid-|-- uuid in unprotected
Encrypted signed      |             |
unredacted vCon:      |  cyphertext-|--- JWS signed
                      ---------------  / unredacted vCon
                                      / in cyphertext
                 /-------------------/ parameter
                /
               /  -------------
Signed         -> |JWS   uuid-|-- unredacted vCon uuid in header
unredacted vcon:  |           |
                  |   payload-|-- unsigned unredacted vCon
                  -------------  \ in payload
                                  \   ----------
                                   -->| vCon   |
Unsigned unredacted vCon:             |        |
                                      ----------
Figure 1: redacted vCon object tree

4.1.9. amended

A signed or encrypted vCon cannot be modified without invalidating it. In these cases, to allow for adding of additional information a new vCon instance version MUST be created. The prior vCon instance version is referenced by the Amended Object (Section 4.1.9.1). The vCon with amended data contains all of the data that is in the referenced vCon with the exception of data that is amended. That is to say that the newer version of the vCon is a deep copy of the prior version with the amended and additional data added to it.

The prior vCon instance version SHOULD be referenced via the uuid of the prior vCon instance version, and MAY include the url and content_hash parameters (see Externally Referenced Files (Section 2.4)).

  • amended: "Amended" (optional, mutually exclusive with redacted parameter)

4.1.9.1. Amended Object

The Amended Object contains the following parameters:

  • uuid: "String" (optional if external reference provided)

The value contains the uuid string value (Section 4.1.2) of the unredacted/original vCon instance version.

The location of the referenced vCon MAY be provided, as defined in Externally Referenced Files (Section 2.4) by including url and content_hash. content_hash MUST be provided if url is provided.

  • url: "String"

  • content_hash: "ContentHash" | "ContentHash[]"

The following figure illustrates an example partial JSON object tree for an amended vCon. The top level object is the JWS signed amended vCon which contains the unsigned form of the vCon in it's payload parameter. The second level object is the amended vCon with additional conversational data (e.g. analysis data). It refers to its original parent (or prior vCon instance version) of the vCon in its amended parameter. Note: the amended parameter may refer to the prior version of the vCon via URL. The amended vCon in this figure refers to the JWS signed version of the vCon, which in turn contains the original vCon in unsigned form in its payload parameter.

                --------------
Signed          | JWS   uuid-|-- amended vCon uuid in header
amended vCon:   |            |
                |    payload-|-- payload parameter
                -------------- / contains unsigned
                              / amended vCon
            -------------    /
vCon with   |vCon       |<---
amended     |           |
data:       |   amended-|--- amended parameter
            |  analysis-|  / refers to JWS
            ------------- / signed original vCon
                         / along with additional
                        / conversational data
                       / (e.g. analysis)
                      /
                     /
                    / ------------
                    ->| JWS uuid-|-- original vCon uuid in header
signed                |          |
original vCon:        |  payload-|--- payload parameter
                      ------------  / contains unsigned
                                   / original vCon
                  -------------   /
Original vCon:    |vCon       |<--
                  |           |
                  |   parties |
                  |   dialog  |
                  -------------
Figure 2: amended vCon object tree

4.1.10. parties Objects Array

The name, identity or contact information of all of the parties involved with the conversation are included in the parties object array. Whether the parties were observers, passive or active participants in the conversation, they each are included as a Party Object in the parties array.

  • parties: "Party[]" (optional)

The value of the parties parameter is an array of Party Objects (Section 4.2).

4.1.11. dialog Objects Array

The actual conversation which occurred over text, audio or video that was captured, is contained in the dialog Objects Array.

  • dialog: "Dialog[]" (optional)

The value of the dialog parameter is an array of Dialog Objects (Section 4.3). It should be noted that the Dialog Objects may not be sorted in chronological order. They are in the order that they were added. It is the applications responsibility to sort dialog and transcriptions if they are needed in chronological order.

4.1.12. analysis Objects Array

Analysis, which is performed on the conversational data, is stored in the analysis Objects array.

  • analysis: "Analysis[]" (optional)

The value of the analysis parameter is an array of Analysis Objects (Section 4.5).

4.1.13. attachments Objects Array

Ancillary documents, discussed, presented, referenced or related to the conversation may be stored in the attachments array. It should be noted that the Attachment Objects may not be sorted in chronological order. They are in the order that they were added.

  • attachments: "Attachment[]" (optional)

The value of the attachments parameter is an array of Attachment Objects (Section 4.4).

4.2. Party Object

A Party Object contains information about a specific party or participant in the conversation. The information that is available about the party varies with the context, the communication mode and platform. There are times when no information is available for a party either initially or over the entire life of the vCon. In such situations, it is possible to have a Party Object with no parameters in it. A Party Object SHOULD be created for each participant. This may result in more than one empty Party Object. They are distinct by the order or index in the Party Object array.

4.2.1. tel

If the tel URL for the party is known, it can be included in the tel parameter.

  • tel: "String" (optional)

The value of the tel parameter SHOULD be a valid [TEL] URL. The URL scheme prefix (i.e. "tel:") is optional.

4.2.2. sip

The [SIP] URL for the party can be provided in the sip parameter.

  • sip: "String" (optional)

    The value of the sip parameter is the addr-spec as defined in section 25.1 of [SIP].

4.2.3. stir

If the STIR [PASSporT] was provided to identify the party, the PASSporT can be included in the stir parameter for the party.

  • stir: "String" (optional)

The string value of the stir parameter contains the [PASSporT] in the JWS Compact Serialization form.

4.2.4. mailto

If the mailto URL is known for the party, it can be included in the mailto parameter.

  • mailto: "String" (optional)

The value of the mailto parameter is a string containing an email address for the party. It MAY be provided in any common form, such as a bare address or a [MAILTO] URL; when a [MAILTO] URL is used, the "mailto:" scheme prefix is optional.

4.2.5. name

If the party's name is known, it can be included in the name parameter.

  • name: "String" (optional)

The string value of the name parameter is a free form JSON string in which part or all of the party's name can be included. It may be necessary, for privacy reasons, to not identify any information about the party. This MAY be indicated by creating a Party Object with only the name parameter and setting its value to "anonymous". A Party Object SHOULD be create for each anonymous party in the conversation. This is necessary to capture the number of parties and distinction between which party contributed what data or dialog in the conversation. Hence it is possible to have multiple anonymous Party Objects in the vCon. They are distinct by the order or index in the Party Object array.

4.2.6. did

If a Decentralized Identifier [DID] is known for the party, it can be included in the did parameter.

  • did: "String" (optional)

The value of the did parameter MUST be a valid DID URI that enables verifiable, decentralized digital identity for the party. DIDs are designed to be decoupled from centralized registries and identity providers, allowing the controller of the DID to prove control without requiring permission from other parties. The DID can refer to any subject (person, organization, thing, etc.) as determined by the controller of the DID.

4.2.7. validation

Proof of authorization of the communication channel through STIR, login or possession of a device, is often not sufficient proof of the identity of the person at the other end of the communications channel. It is common in call centers to validate the identity of the person on the communication channel through verification of some sort of personal identification information. The methods used, often varies with the situation and is business practices specific. The purpose of the validation parameter, is to allow the validator to save a label or token which identifies the method of identity validation used to identify the person at the other end of the communication channel. For confidentially reasons, it SHOULD NOT contain the data used to validate the name. However it MAY name the data used to validate the name (e.g. "SSN", "DOB", "user ID and password"). It is up to the domain creating the vCon to define the set of tokens or values to be used for the validation parameter.

  • validation: "String" (SHOULD be provided if name parameter is provided)

The value of the validation string MAY be "none" or enterprise or domain defined token or string values.

4.2.8. gmlpos

If the geolocation of the party is known, it can be added in the gmlpos parameter. The gmlpos parameter contains the latitude and longitude of the location of the party at the time of the conversation start.

  • gmlpos: "String" (optional)

The gmlpos parameter value contains a string of the same format as the gml:pos element defined in section 3.2 of the [PIDF-LO] PIDF.

4.2.9. civicaddress

The the civicaddress parameter value contains a Civicaddress Object which is optional and contains civic address information about the location for the party.

  • civicaddress: "Civicaddress" (optional)

The Civicaddress Object MAY contain any or all of the following parameters: country, a1, a2, a3, a4, a5, a6, prd, pod, sts, hno, hns, lmk, loc, flr, nam, pc as defined in section 2.2.1 of [GEOPRIV]. The values of all of these parameters are of type String. Note that the parameter names MUST be in lower case when contained in the Civicaddress Object even though they are in upper case in [GEOPRIV].

  • country: "String" (optional)

  • a1: "String" (optional)

  • a2: "String" (optional)

  • a3: "String" (optional)

  • a4: "String" (optional)

  • a5: "String" (optional)

  • a6: "String" (optional)

  • prd: "String" (optional)

  • pod: "String" (optional)

  • sts: "String" (optional)

  • hno: "String" (optional)

  • hns: "String" (optional)

  • lmk: "String" (optional)

  • loc: "String" (optional)

  • flr: "String" (optional)

  • nam: "String" (optional)

  • pc: "String" (optional)

4.2.10. uuid

The uuid is a unique identifier for the participant. In a contact center, this is particularly important for the call agent participant, and must be static across interactions to allow correlation with the actual agent configuration provisioned into the systems. The value of the uuid parameter is a free form unique identifier string for the participant. The value is not constrained to the syntax defined in [UUID]. Operators often have existing methods of generating unique participant identifiers and MAY use any unique string value.

  • uuid: "String" (optional)

4.2.11. type

There are different types of parties that participate in or contribute information to a conversation. The type parameter may be used to indicate the type of participant represented by the Party Object.

  • type: "String" (optional)

The value of the type parameter SHOULD be one of the following: "person", "bot", "organization"

4.2.12. org

The party may belong to or be an organization. The org parameter is a free form text string for containing the organization identifier.

  • org: "String" (optional)

4.2.13. dept

The party may belong to a department with in an organization. The dept parameter is a free form text string for containing the party's department identifier.

  • dept: "String" (optional)

4.3. Dialog Object

The Dialog object references or contains text, audio or video captured from the conversation. Currently five types of dialog objects are defined in this document:

  • Text based media communications

  • Audio or Video recorded media communications

  • Metadata for failed or incompleted communications

  • Metadata for providing relationships between other Dialog Objects in transfer scenarios

  • Metadata for providing relationships between recording Dialog Objects in recording-set scenarios

Media captured in a media-based Dialog Object (type text and recording) SHOULD satisfy two constraints: the media is part of the conversation itself, and the media is transcribable. Media is part of the conversation when it is the communication exchanged between the parties, as opposed to a document or item that is referenced, discussed or presented within the conversation. Media that is transcribable can be converted into a textual representation of sequential communication between parties. Text media is already in textual form and is therefore always transcribable. While images such as sunsets, cows, photographs of documents, or application forms may be describable, they are not transcribable in a concise manner and SHOULD NOT be included as Dialog Objects. They SHOULD be included as Attachment Objects.

Text and audio may be subject to interpretation, but they are transcribable to a precise dialog representation. Although transcriptions may not always be accurate, there exists a single correct transcription for any given content.

Media that is not transcribable SHOULD be included in the vCon as Attachment Objects rather than Dialog Objects.

Whether a fax or photograph of a text-based letter belongs in a Dialog Object depends upon its role in the conversation. A letter faxed to the other party as the communication itself, such as a letter faxed to a doctor, is both transcribable and part of the conversation and MAY be included as a Dialog Object. The same letter shared or discussed within some other conversation is referenced material rather than the conversation itself and SHOULD be included as an Attachment Object, even though it is transcribable. Most other faxes and photographs SHOULD be included as Attachment Objects and SHOULD NOT be included as Dialog Objects. Similarly, a musical recording, even if it is in MP3 audio format, SHOULD be included as an Attachment and SHOULD NOT be included as a Dialog Object.

It may not always be known at the time of vCon construction whether an image or recording is transcribable.

This distinction is important for interoperability. If it is ambiguous as to what belongs in a Dialog Object versus an Attachment Object, interoperability cannot be achieved, as vCon constructors will not be able to consistently determine where content should be placed and users of vCons will not know where content can be found within the vCon.

There are situations when little or no information is available for a dialog either initially or over the entire life of the vCon and yet it is known that the dialog occurred. For example this may occur in some call transfer cases where there is nothing known about the consultative call. In such situations, it is possible to have a placeholder Dialog Object which contains only the type parameter and, for the "incomplete" type, the required disposition parameter. As the consultative call is a call, a placeholder Dialog Object for it MUST be of type "recording" if the call was set up, or of type "incomplete" if it was not. There may be more than one placeholder Dialog Object in the vCon. They are distinct by the order or index in the Dialog Object array.

4.3.1. type

  • type: "String"

The string MUST have the value of either "recording", "recording-set", "text", "transfer" or "incomplete". The semantics of each Dialog Object type are described in the following subsections. The applicability of each of the Dialog Object parameters to each of the types is summarized in Section 4.3.1.6.

4.3.1.1. recording

A dialog of type "recording" has Dialog Content that either contains a body or refers to via url, which is a recording of the video and/or audio of a segment of the conversation. A recording Dialog Object that is part of a set of recordings which collectively represent a call or session, may reference the associated recording-set Dialog Object via the recording_set parameter (see Section 4.3.7).

4.3.1.2. recording-set

A dialog of type "recording-set" contains metadata describing a set of "recording" Dialog Objects that collectively represent a call or session. The conversation itself is captured in the referenced "recording" Dialog Objects; a recording-set Dialog Object does not have Dialog Content (see Section 4.3.10). The recordings parameter identifies the "recording" Dialog Objects in the set (see Section 4.3.6). The start, duration, parties and session_id parameters of a recording-set Dialog Object describe the call or session as a whole (see Section 4.3.2, Section 4.3.3, Section 4.3.4 and Section 4.3.12).

4.3.1.3. text

A dialog of type "text" has Dialog Content that either contains a body or refers to via url, which contains the text from one of the parties for a segment of the conversation.

4.3.1.4. transfer

A dialog of type "transfer" does not capture actual conversation exchange, but rather captures operations, parties and relations between dialog segments. The conversation is captured in other Dialog Objects; a transfer Dialog Object does not have Dialog Content (see Section 4.3.10). The Dialog Transfer parameters are used to show the roles and relationships between the parties and other Dialog Objects as the transfer process occurred (see Section 4.3.14).

4.3.1.5. incomplete

A dialog of type "incomplete" captures a call or conversation that failed to be setup to the point of exchanging any conversation. As no conversation was exchanged, an incomplete Dialog Object does not have Dialog Content (see Section 4.3.10). An incomplete Dialog Object has a required disposition parameter which indicates why the call or conversation failed (see Section 4.3.11).

4.3.1.6. Dialog Object Parameter Applicability by Type

The following table summarizes which Dialog Object parameters apply to each Dialog Object type. The parameter definitions in the subsections of this document are definitive; this table is provided as a summary.

The symbols used in the table are defined as follows.

M

The parameter MUST be present.

S

The parameter SHOULD be present.

O

The parameter is optional.

SN

The parameter SHOULD NOT be present.

X

The parameter MUST NOT be present.

-

The parameter has no defined meaning for this type; it MAY be present but its semantics are undefined.

Table 1
Parameter recording recording-set text transfer incomplete
type M M M M M
start S S S O S
duration O O O - O
parties S S S X O
originator O O O X O
recordings X M X X X
recording_set O X X X X
mediatype M (1) X M (1) X X
filename O X O X X
body S (2) X S (2) X X
encoding S (3) X S (3) X X
url S (2) X S (2) X X
content_hash S (4) X S (4) X X
disposition SN SN SN SN M
session_id O O O X O
party_history O O O X O
transferee X X X S X
transferor X X X S X
transfer_target X X X O X
original X X X S X
consultation X X X O X
target_dialog X X X S X
application O O O O O
message_id O X O X X

(1) MUST be present for inline Dialog Content; optional for externally referenced Dialog Content when the media type is provided in the [HTTPS] Content-Type header; not required when Dialog Content is absent, such as in a placeholder Dialog Object or a redacted vCon.

(2) body or url MAY be absent in a redacted vCon.

(3) MUST be present when the body parameter is present and is not an empty string (see Inline Files (Section 2.3)).

(4) MUST be present when the url parameter is present (see Section 2.4.2).

4.3.2. start

The start parameter contains the date and time for the beginning of the captured piece of dialog. The start parameter SHOULD be present unless it is not known. For text it is the time that the party started typing or if not available, then it is the time the text was sent. For audio and video recordings, it is the time which corresponds to the beginning of the recording. For a recording-set Dialog Object, it is the time corresponding to the beginning of the call or session. It should be noted that Dialog Objects may not be ordered by the value of the start parameter. Dialog Objects in the dialog array are in order that they were added to the vCon and cannot be reordered with out correcting the dialog indices which occur in other Objects in the vCon. The start parameter is optional for the "transfer" type Dialog Object as it may not always be known.

  • start: "Date"

4.3.3. duration

The duration parameter contains the duration in seconds of the referenced or included piece of dialog. For text, if known, it is the time duration from when the party started typing to when they completed typing and the text was sent. For recordings, it is the duration of the recording. For a recording-set Dialog Object, it is the duration of the call or session. The start and duration parameters of a recording-set Dialog Object identify the complete time interval represented by the associated recording Dialog Objects. The duration parameter is not applicable to the "transfer" type Dialog Object. For an "incomplete" type Dialog Object, the duration parameter may capture the time from the attempt to setup the call or conversation until it failed.

  • duration: "UnsignedInt" | "UnsignedFloat" (optional)

The value MUST be the dialog duration in seconds.

4.3.4. parties

The party(s) which generated the text or recording for this piece of dialog are indicated in the parties parameter. The parties parameter SHOULD be present in "recording", "recording-set" and "text" type Dialog Objects. The parties parameter MUST NOT be present in "transfer" type Dialog Objects (see Section 4.3.14). The parties parameter is optional for "incomplete" type Dialog Objects, where it indicates the parties between which the call or conversation setup was attempted.

  • parties: "UnsignedInt" | "UnsignedInt[]" | ("UnsignedInt" | "UnsignedInt[]")[]

Single channel recordings should have a parties value of the form: "UnsignedInt" or "UnsignedInt[]" where the integer value or array of integer values are the indices to the Party Object(s) in the parties array that contributed to the mix for the single channel recording. The index for the Party Object SHOULD be included even if the indicated party was silent the entire piece of dialog.

Multi-channel recordings MUST have a parties value that is an array of the same size as the number of channels in the recording. The values in that array are either an integer or an array of integers which are the indices to the parties that contributed to the mix for the associated channel of the recording. The index for Party Objects SHOULD be included even if the party was silent the entire conversation. If not all channels are used in a recording, such that no parties are recorded on one or more channels, a null placeholder MUST be inserted into the parties array for the corresponding channel.

Some recording systems represent a single call or session using multiple recording Dialog Objects. This may occur when recordings are periodically segmented or when separate recordings are created for each party and talk spurt. In these cases, a single recording Dialog Object identifies only the parties captured, or potentially captured, in that recording. Other participants are identified only in the recording Dialog Objects in which they are captured or potentially captured. As a result, no single recording Dialog Object necessarily identifies all parties participating in the conversation. Similarly, party_events need to be associated with a Dialog Object, but a recording Dialog Object may not exist for the point in time at which the event occurs. A recording-set Dialog Object MAY be used to represent the complete call or session. The start parameter of a recording-set Dialog Object identifies the beginning of the call or session. The duration parameter of a recording-set Dialog Object identifies the duration of the call or session. The parties parameter of a recording-set Dialog Object SHOULD contain all parties known to participate in the call or session, regardless of whether they contribute recorded media.

It is implied that the first party in the dialog Object parties list, is the originator of the dialog. However, in some situations, it is difficult to impose the constraint that the first channel of a recording is the originator. If ensuring that the first channel and party listed is the originator is not possible, the optional originator parameter indicates the originator party. In other cases, there may be a separate recording file for each party in a conversation, where only one party is recorded per file. In this situation, it is necessary to indicate the originator as the dialog Object parties parameter may contain only one party and may not be the originator. It should be noted that the recordings may be shorter than the collective conference when there is a separate recording per speaker/party. For example the recording(s) of the individual speaker may be trimmed to only the parts where they are actually speaking.

In the email context, [SMTP] messages have the headers From, To, Cc and Bcc that all correspond to parties to the text Dialog Object. The From header should be the first party index in the parties parameter for the text Dialog Object. They are the implied originator. The parties listed in the To, Cc and Bcc [SMTP] headers (if present) should all be added in that order to the parties parameter in the text Dialog Object. The sender SHOULD be allowed to set a policy, through out of band means, as to whether they would like their application or server to include the Bcc parties in the vCon. A text Dialog Object should only contain a single [SMTP] message. Each may have a different set of parties.

4.3.5. originator

The originator party for this dialog. For email and text, this is the sender of the text. For audio and video calls, this is the calling party. For a scheduled meeting or conference, this is the organizer, the party that scheduled or created the meeting. The organizer may be a party that never joins the conference; such a party may still be included in the parties array. The organizer is distinct from the party acting as host or controller of the conference at any point during the meeting; identifying the host or controller is out of scope for this document. If the originator is not known, an empty Party Object (see Party Object (Section 4.2)) may be used as the first party or as the party referenced by the originator parameter. The originator parameter is only provided if the first party of the dialog Object parties list is NOT the originator. The originator parameter MUST NOT be present in "transfer" type Dialog Objects (see Section 4.3.14).

  • originator: "UnsignedInt" (optional)

The originator value is the index into the parties Objects Array, to the party that originated the dialog.

4.3.6. recordings

The recordings parameter identifies the recording Dialog Objects that are part of the recording-set Dialog Object.

  • recordings: "UnsignedInt[]"

The recordings parameter contains the indices of all recording Dialog Objects that are part of the recording-set. The recordings parameter MUST be present in recording-set Dialog Objects. The recordings parameter MUST NOT be present in other Dialog Object types.

4.3.7. recording_set

The recording_set parameter identifies the recording-set Dialog Object to which the recording Dialog Object belongs.

  • recording_set: "UnsignedInt" (optional; SHOULD be present when the recording is part of a recording-set)

The recording_set parameter SHOULD be present when a recording Dialog Object is part of a recording-set Dialog Object. The recording_set parameter MUST NOT be present in other Dialog Object types.

4.3.8. mediatype

The media type for the piece of dialog included or referenced is provided in the mediatype parameter. The mediatype parameter MUST be provided for inline dialog files and MUST be provided if the Content-Type header in the [HTTPS] response for the externally referenced URL is not provided. The mediatype parameter is not required when the Dialog Content is absent, such as in a placeholder Dialog Object or when the body and url have been redacted. The mediatype parameter MUST NOT be present in "recording-set", "transfer" or "incomplete" type Dialog Objects as they do not have Dialog Content.

  • mediatype: "Mediatype" (optional for externally referenced files, if absent, this is provided in the [HTTPS] Content-Type header)

The media types SHOULD be one of the following strings:

  • "text/plain"

  • "audio/x-wav"

  • "audio/x-mp3"

  • "audio/x-mp4"

  • "audio/ogg"

  • "video/x-mp4"

  • "video/ogg"

  • "multipart/mixed"

    Note: multi-part will also likely include the boundary parameter

4.3.9. filename

It is sometimes useful to preserve the name of the file which originally contained this piece of dialog. This can be done in the filename parameter. The filename parameter MUST NOT be present in "recording-set", "transfer" or "incomplete" type Dialog Objects as they do not have Dialog Content.

  • filename: "String" (optional)

4.3.10. Dialog Content

The Dialog Object SHOULD contain the body and encoding parameters or the url and content_hash parameters for all dialog types other than "incomplete", "transfer" and "recording-set", these parameters MUST NOT be present for "incomplete", "transfer" or "recording-set" dialog types (see Inline Files (Section 2.3) and Externally Referenced Files (Section 2.4)). The exception to this is that the body or url MAY be absent if it is redacted.

For inline included dialog:

  • body: "*" (optional in a redacted vCon)

  • encoding: "String"

Alternatively, for externally referenced dialog:

  • url: "String" (optional in a redacted vCon)

  • content_hash: "ContentHash" | "ContentHash[]"

4.3.11. disposition

If the dialog type is "incomplete", it MUST have a disposition parameter. If the reason that the call or conversation failed is not known, such as in a placeholder Dialog Object, the disposition value "failed" SHOULD be used. The value of the disposition parameter provides the reason that the "call control" failed. The term: "call control" is used in a loose sense, as there in not always a call involved, to differentiate from a call disposition that an agent may assign to a call to indicate the reason, issue addressed or outcome of a conversation. This latter definition of call disposition is not dialog, but analysis of the conversation and is not included in the dialog portion.

  • disposition: "String" (required for incomplete type Dialog Objects, SHOULD NOT be present for other dialog types)

The value of the disposition parameter MUST be one of the following string:

  • "no-answer" - a call or connection was attempted, but no one answered or accepted the connection

  • "congestion" - a call or connection was attempted, but was unable to be completed due to system load

  • "failed" - a call or connection was attempted, but failed

  • "busy" - a call or connection was attempted, but the party was busy with another conversation

  • "hung-up" - a call or connection was made, but the party hung-up before any conversation occurred

  • "voicemail-no-message" - a call or connection was made, the voicemail system answered, but no message was left

    Note: if a message was left with the voicemail system this is no longer an "incomplete" type dialog, it is a "recording" type and the conversation SHOULD be included in the Dialog Content.

4.3.12. session_id

The [SESSION-ID] MAY be included for the dialog. If the same [SESSION-ID] applies to all the parties in a dialog, than a single instance of the SessionId Object is provided as the value of session_id. If some parties have a different or no associated [SESSION-ID] for this Dialog Object, then the array structure of the session_id objects MUST correlate to the array structure of the Dialog Object's parties index array. Parties which do not have a [SESSION-ID] associated with this dialog, MUST have an empty object ({}) for the SessionId Object. That an empty Object and not an Object with two "nil UUIDs" as defined in section 7 of [SESSION-ID]. It is also possible that the SessionId Object will not have values for both the local and remote parameters in some conferencing situations (See [SESSION-ID]). In the case that one end of the [SESSION-ID] does not have a UUID, the "nil UUID" String value SHOULD be used as defined in section 7 of [SESSION-ID]. For a recording-set Dialog Object, a single SessionId Object value applies to the whole call or session represented by the set. The individual recording Dialog Objects in the set may each capture only a leg or subset of the parties of the call or session; the session_id values on those recording Dialog Objects follow the party correlation rules above. The recording-set Dialog Object is the appropriate place to capture a session identifier that applies to the call or session as a whole. The session_id parameter MUST NOT be present in "transfer" type Dialog Objects.

  • session_id: "SessionId" | "SessionId[]" | ("SessionId" | "SessionId[]")[] (optional)

4.3.13. party_history Objects Array

Participants in a dialog may not all join and leave at the same time. To support the capturing of the information when parties join, drop, go on hold or mute and unmute, the party_history array may be added to the Dialog Object. The party_history parameter MUST NOT be present in "transfer" type Dialog Objects.

  • party_history: "Party_History[]" (optional)

4.3.13.1. Party_History Object

The Party_History Object contains the following parameters:

  • party: "UnsignedInt"

    The index of the party for this event.

  • time: "Date"

    The time at which this event occurred.

  • event: "String"

    The string token for the event which MUST be one of the following:

    • "join" - when the party joins the dialog

    • "drop" - when the party drops out of the dialog

    • "hold" - when the party is put on hold

    • "unhold" - when the part is taken off hold

    • "mute" - when the party is muted

    • "unmute" - when the part is taken off mute

    • "keydown" - when a DTMF or application key/button was pressed

    • "keyup" - when a DTMF or application key/button was released

  • button: "String" - (optional, required for keydown and keyup events)

The button parameter value is the String value of the DTMF digit, character or string label for the button that was pressed or released.

4.3.14. Dialog Transfer

A dialog of type "transfer" documents the roles of three parties and the relationship between 2 or three dialog segments. In a transfer operation, the roles of the three parties to a transfer are defined in [SIP-XFER] as:

  • Transferee

  • Transferor

  • Transfer Target

There are two or three calls in which the parties are connected:

  • original call

  • consultative call (optional as this call may not get created)

  • target call

To capture the above roles and dialog segments, the following parameters are defined for the "transfer" type dialog and MUST NOT be present in other dialog types. Each of these parameters SHOULD be present in the "transfer" type Dialog Object unless noted as optional.

  • transferee: "UnsignedInt"

The value of the transferee parameter is the index into the parties Object array to the party that played the role of the Transferee.

  • transferor: "UnsignedInt"

The value of the transferor parameter is the index into the parties Object array to the party that played the role of the Transferor.

  • transfer_target: "UnsignedInt" (optional)

The value of the transfer_target parameter is the index into the parties Object array to the party that played the role of the Transfer Target. The transfer_target is optional in the case where the transfer is abandoned before the target was identified.

The consultation, target_dialog and original parameters all refer to the Dialog Objects that correspond to the 2 to 3 calls that are part of a transfer. These calls may end up spread across multiple Dialog Objects due to the nature of how the calls are recorded. For example each party may be recorded in a separate file which will result in a dialog for each. Alternatively a call may go on hold where recording is stopped and back off again resulting where recording is started again in a separate recording file, resulting in multiple Dialog Objects. The values for the consultation, target_dialog and original parameters each reference a single Dialog Object. When a call is represented by multiple recording Dialog Objects, a recording-set type Dialog Object which represents that call MAY be referenced (see Section 4.3.1.2).

There are scenarios where we know that a transfer has occurred, but we have no Dialog Object information for one or two of the consultation, target or transfer calls. In this case a placeholder Dialog Object is created and its index is used for the consultation, target_dialog or original parameter. A unique Dialog Object SHOULD be referenced for each role in the transfer. However a Dialog Object may be referenced in more than one transfer dialogs when multiple transfers occur.

  • original: "UnsignedInt"

The value of the original parameter is the index into the dialog Object array to the "recording", "recording-set" or "text" type Dialog Object for the original dialog between the Transferee and the Transferor.

  • consultation: "UnsignedInt" (optional)

The value of the consultation parameter is the index into the Dialog Object array to the "recording", "recording-set", "text" or "incomplete" type Dialog Object for the consultative dialog between the Transferor and the Transfer Target. It is also possible for there to be more than one consultation. This may occur for a number of reasons. Call attempts may fail. The caller may decide the consultation with a party is not the desired transfer target.

  • target_dialog: "UnsignedInt"

The value of the target_dialog parameter is the index into the Dialog Object array to the "recording", "recording-set", "text" or "incomplete" type Dialog Object for the target dialog between the Transferee and the Transfer Target.

A number of Dialog Object parameters are prohibited in "transfer" type Dialog Objects; see Section 4.3.1.6 for a summary and the individual parameter definitions for the normative statements.

The "transfer" type dialog only captures the roles, operations and events of the parties and the dialog setup. It does not capture the purpose or reason for the transfer as that is analysis to be captures in the analysis section of the Vcon after the conversation has occurred.

4.3.15. application

The application parameter is used to capture the application, communication channel or context over which the conversation was held. The conversation mode can be identified by looking at the dialog type. However that does not different between different communication platform service providers or hosting service. For example, the application parameter can be used to identify the web conference hosting service.

  • application "String" (optional)

4.3.16. message_id

Some messaging systems assign a unique message identifier to each message. The message_id parameter is applicable to "recording" and "text" type Dialog Objects and MUST NOT be present in "recording-set", "transfer" or "incomplete" type Dialog Objects. The message_id parameter may be used to label the message for either cross referencing back to the messaging system or to prevent the addition of duplicate messages to the vCon. For example SMTP [SMTP] messages have a message-id in the SMTP header. In the SMTP case a message may exist in multiple mailboxes or tags. When exporting these SMTP messages, the message_id parameter may be used to avoid adding the same message, to the vCon containing the email thread, more than once.

  • message_id: "String" (optional)

4.4. Attachment Object

Ancillary documents to the conversation are included or referenced in the Attachment Object. There is no constraint on the types files which can be included or referenced. As most modes of communication, that allow the exchange of files, do not constrain the file type, any file type may be included here.

4.4.1. purpose

The purpose parameter may be used to provide a text base description of the purpose or point of the attachment. There is no restricted set of values for this description.

  • purpose: "String" (optional)

4.4.2. start

The start parameter contains the date and time that the Attachment Object was sent/exchanged. It should be noted that Attachment Objects may not be ordered by the value of the start parameter. Attachment Objects in the attachments array are in order that they were added to the vCon and cannot be reordered with out correcting the attachment indices which may occur in other Objects in the vCon.

  • start: "Date"

4.4.3. party

In most conversations, ancillary documents originate from one of the parties involved in the conversation. This party is not necessarily the document's author, but rather the party that distributed the document. The distributing party is identified by the party parameter in the Attachment Object. To provide provenance for the attachment, the party index MUST be specified. The identified party need not be a participant in the conversation itself. For example, an organization that processes or constructs the vCon may add attachments containing information about the conversation. The organization or entity that adds the attachment SHOULD be represented as a Party Object.

  • party: "UnsignedInt"

The value of the party parameter is the index into the Party Object array to the party that contributed the attachment.

4.4.4. dialog

Attachments are added as data related to the dialog. The dialog parameter is used to identify the dialog that the attachment is part of. The dialog is identified by the index to the dialog Object in the dialog objects array.

  • dialog: "UnsignedInt"

4.4.5. mediatype

The media type for the included or referenced attachment file is provided in the mediatype parameter. The mediatype parameter MUST be provided for inline attachment files and MUST be provided if the Content-Type header in the [HTTPS] response for the externally referenced URL is not provided. The mediatype parameter is not required when the Attachment Content is absent, such as when the body and url have been redacted.

  • mediatype: "Mediatype" (optional for externally referenced files, if absent, this is provided in the [HTTPS] Content-Type header)

The mediatype string contains the media type or [MIME] type of the attached file.

4.4.6. filename

It is sometimes useful to preserve the name of the file which originally contained this attachment file. This can be done in the filename parameter.

  • filename: "String" (optional)

The file name string contains an optional name for the attachment file referenced in this Attachment Object.

4.4.7. Attachment Content

The Attachment Object SHOULD contain the body and encoding parameters or the url and content_hash parameters (see Inline Files (Section 2.3) and Externally Referenced Files (Section 2.4)). The exception to this is that the body or url MAY be absent if it is redacted.

For inline included attachments:

  • body: "*"

  • encoding: "String"

Alternatively, for externally referenced attachments:

  • url: "String"

  • content_hash: "ContentHash" | "ContentHash[]"

4.5. Analysis Object

Analysis is a broad and in some cases developing field. This document does not attempt to suggest a SHOULD support list of types. Nor are formats for analysis data defined in this document. That is for research and specification outside the scope of this document. For this reason the Analysis Object provides multiple ways to define the media type of the analysis file. If a well known media type is defined, it SHOULD be used. For analysis data or files types for which a media type is not defined, the vendor and schema parameters SHOULD be used.

4.5.1. type

The type parameter is used to label the semantic type of analysis data.

  • type: "String"

The string value SHOULD be one of the following:

  • "report"

  • "sentiment"

  • "summary"

  • "transcript"

  • "translation"

  • "tts"

4.5.2. dialog

Analysis typically pertains to one or more of the Dialog Objects in the dialog array. The dialog parameter is used to indicate which Dialog Objects this analysis was based upon.

  • dialog: "UnsignedInt" | "UnsignedInt[]" (optional only if the analysis was not derived from any of the dialog)

The value of the dialog parameter is the index to the dialog or array of indices to the Dialog Object array to which this analysis object corresponds.

4.5.3. attachment

The analysis may pertain to one or more of the Attachment Objects in the attachment array. The attachment parameter is used to indicate which Attachment Objects this analysis was based upon.

  • attachment: "UnsignedInt" | "UnsignedInt[]" (optional only if the analysis was not derived from any of the attachments)

The value of the attachment parameter is the index to the attachment or array of indices to the Attachment Object array to which this analysis object corresponds.

4.5.4. mediatype

The media type for the included or referenced analysis file is provided in the mediatype parameter. The mediatype parameter SHOULD be provided for inline analysis files and for externally referenced analysis files when the Content-Type header in the [HTTPS] response is not provided. A media type may not be defined for the format of the analysis data; in this case the vendor, product and schema parameters SHOULD be used to identify the data format instead.

  • mediatype: "Mediatype" (optional)

The mediatype string contains the media type or [MIME] type of the analysis file.

4.5.5. filename

It is sometimes useful to preserve the name of the file which originally contained this analysis data. This can be done in the filename parameter.

  • filename: "String" (optional)

The file name string contains an optional name for the analysis data file referenced in this Analysis Object.

4.5.6. vendor

There may not be a IANA registered media type for the file format containing the analysis data. Even if a media type is defined, it is often useful to keep a record of the vendor that produced the software that produced the analysis. Different implementations perform differently and knowing the implementation can be useful in interpreting the analysis. For this reason, the vendor or product name is provided in the vendor parameter.

  • vendor: "String"

The vendor string value contains the vendor or product name of the software which generated this analysis.

4.5.7. product

As the vendor may have more than one product, the product parameter may be used to differentiate it from other products which may have different schemas of analysis data.

  • product: "string" (optional)

4.5.8. schema

The same vendor or software product may produce different formats or data for the same analysis. The schema parameter allows the data format, schema or configuration used to generate the analysis to be saved with the included or referenced analysis data.

  • schema: "String" (optional)

The schema string contains a token or label for the data format or schema for the analysis data. As the vendor name may not be specific enough to identify the format of the analysis, the schema value is provide to differentiate from potentially multiple data formats for analysis provided by the same vendor or software.

4.5.9. Analysis Content

The Analysis Object SHOULD contain the body and encoding parameters or the url and content_hash parameters (see Inline Files (Section 2.3) and Externally Referenced Files (Section 2.4)). The exception to this is that the body or url MAY be absent if it is redacted.

For inline included analysis:

  • body: "*"

  • encoding: "String"

Alternatively, for externally referenced analysis:

  • url: "String"

  • content_hash: "ContentHash" | "ContentHash[]"

5. Security Considerations

The security concerns for vCons can put into two categories: making the conversation immutable through integrity verification and protecting the confidentiality of privacy of the parties to the conversation and/or their PII. These requirements along with need to evolve a vCon (e.g. adding analysis, translations and transcriptions) conflict in some ways. To enable this, multiple versions of a vCon may be created. Versions of a vCon may add information (e.g. analysis added to a prior vCon referenced by the amended (Section 4.1.9)) and versions that remove information (e.g. redactions of privacy information removed from the vCon referenced in the redacted (Section 4.1.8)). Redactions may be at different levels for example:

Different parts and versions of a vCon may be created in different security domains over a period of time. In addition, some conversation data may be referenced externally through an HTTPS URL as opposed to completely contained within the vCon. Typically a conversation of one mode, will be hosted or observed in a single domain. This will likely fall into one of the following hosting situations:

The distinction among these has gotten clouded over recent years. The import consideration is that each is a different security domain. Information about a conversation captured in an enterprise communications system (e.g. meta data and Dialog Object(s) recorded in an IP PBX) is a different security domain from a SaaS transcription service (i.e. an Analysis Object). Before a vCon leaves a security domain, it SHOULD be signed to prevent it from being altered. If the new security domain needs to alter it, a new vCon is created with the removed or added data and the prior version is referenced (i.e. via the redacted (Section 4.1.8) or amended (Section 4.1.9)). See the redacted vCon object tree figure-1 and amended vCon object tree figure-2. If information is redacted for privacy reasons, the vCon referenced in the redacted (Section 4.1.8), if inline, SHOULD be encrypted to protect the privacy information in the unredacted version of the vCon.

The secure storage and access of externally referenced conversation data is considered out of scope from this document. Secure mechanisms for HTTPS access and storage of files are well defined. Identity and credentials for accessing externally stored data will be exchanged out of band from the vCon. The one requirement for externally referenced data from the perspective of this document, is proof of integrity of that data.

Using the above described approach for redaction and amending of data, we can reduce the security operations on a vCon to signing and encryption. Two approaches to signing are needed as we have data, in JSON format, that is contained within the vCon and may have data (typically media and file formats, often binary) not contained, inline in the vCon, that is externally referenced.

Externally referenced data will be "signed" using [SHA-512] hash which along with the URL of the externally referenced data is included in the vCon. [SHA-512] was chosen due to the relatively low cost to generate and verify the signature for what could be very large externally referenced media files. As the hash for each externally referenced file is contained in the vCon which will be signed, the chain of authentication is provided via the signature on the vCon itself.

This document specifies the JSON format for vCons. So it seemed the logical solution for signing vCons, is JOSE [JWS] JSON Serialization and likewise for encrypting vCons is JOSE [JWE] JSON Serialization. The solutions are well documents, implementations are readily available and tested.

Methods of redaction exist for text, audio and video using post processing of the media. The method of redaction used is out of the scope of this document. A redacted vCon SHOULD reference it's non-redacted version. The non-redacted version of the vCon referenced from the redacted vCon MUST be encrypted such that only those with permission to view the non-redacted content can decrypt it.

Any time a vCon is shared outside its original security domain, it SHOULD be signed and optionally encrypted. Files externally referenced by a vCon SHOULD always be signed with the verification information included in the vCon that references the external file as defined in Externally Referenced Files (Section 2.4) and Signing Externally Referenced Files (Section 5.1). Externally referenced files SHOULD only be transported over [HTTPS] and SHOULD be access controlled to those who are permitted to read the contents of that non-redacted vCon. vCons transported over non-secure channels such as email MUST be in the encrypted form.

5.1. Signing Externally Referenced Files

In some deployments, it is not practical to include all of the file contents of a vCon inline. In support of that, a file may be externally referenced. When external files are referenced, the signature on the vCon does not secure the file contents from modification. For this reason any externally referenced files SHOULD also have a signature. vCons use the [SHA-512] hash method for integrity checking of externally referenced file content and include its url and content_hash in the vCon which are included in the integrity signature for the whole vCon.

After retrieving externally referenced files, before using its content, the payload of the HTTPS request should be verified using the signature parameter value for the hash for the url body using the procedure defined in section 6.3 and 6.4 of [SHA-512].

5.2. Signed Form of vCon Object

A signed vCon uses [JWS] and takes the General JWS JSON Serialization Syntax form as defined in section 7.2.1 of [JWS]. The vCon General JWS JSON Serialization MUST include x5c or x5u in the unprotected header.

  • payload: "String"

The value of the payload is the Base64Url Encoded string containing either: the unsigned form of the JSON vCon; or the gzipped [GZIP] unsigned form of the JSON vCon. The general construction of the payload string value is described in section 7.2.1 of [JWS]

  • signatures: "Signature[]"

The value of signatures is an array of Signature Objects (Section 5.2.1)

5.2.1. Signature Object

The Signature Object MUST contain a header, protected and signature parameter as defined in section 7.2.1 of [JWS].

  • header: "Header"

The value of header is defined in Header Object (Section 5.2.2)

  • protected: "String"

  • signature: "String"

5.2.2. Header Object

The Header Object and its contents are defined in section 4 of [JWS]. The Header Object for a signed vCon MUST include the alg and either the x5c or x5u arrays. The x5c or x5u requirement makes the management and use of vCons easier, allowing the certificate chain to be found as the vCon is moved.

  • alg: "String"

The string value of alg is defined in section 4.1.1 of [JWS]. For a signed vCon this value SHOULD be "RS256" to maximize interoperability.

  • x5c: "String[]" (MUST provide x5c or x5u)

The array of string values for x5c are defined in section 4.1.6 of [JWS].

  • x5u: "String" (MUST provide x5c or x5u)

The string value of x5u MUST contain an [HTTPS] URL as defined in section 4.1.5 of [JWS].

  • uuid: "String" (SHOULD be provided)

The string value of the UUID for the vCon contained in the payload parameter. This is added for convenience to not require verification of the signed vCon to get it's UUID. When the vCon is verified, the value of this uuid parameter SHOULD be verified against the UUID in the signed vCon.

5.2.3. Long Term Archiving of Signed vCons

In some use cases, it may be necessary to store or archive signed vCons for compliances or records purposes for as long as 10 years or more. In most cases the keys and certificates used to sign the vCon and construct the [JWS] or signed form of the vCon, will have an expiration on the order of a few years at best. Below is an approach on how integrity may be maintained on the archived vCon. There may be other approaches to this as well.

For our example illustrated below, we have a vCon which was signed (labeled as JWS1). The certificate used to sign JWS1 has an expiration date. Before the expiration of the JWS1 signing certificate, the content of JWS1 (the vCon) is verified and then JWS1 is signed as the payload to construct JWS2. Before the expiration of the JWS2 certificate, the contents of JWS2 (JWS1) is verified and then JWS2 is signed as the payload to construct JWS3. The process is continued for the life of the vCon archiving.

When it is desired to access the data in the archived vCon, first the outer JWS (JWS3 in diagram) is verified (payload of JWS2), then the vCon (payload in JWS1) is assumed to have valid integrity.

 ____________
|    JWS3    |
| __________ |
||   JWS2   ||
|| ________ ||
|||  JWS1  |||
||| ______ |||
|||| vCon ||||
||||______||||
|||________|||
||__________||
|____________|

5.3. Encrypted Form of vCon Object

A vCon MUST be signed first using JWS as defined in Signed Form of vCon Object (Section 5.2), then encrypted using JWE as opposed to just encrypted with integrity protection. The rationale is that meta data and dialog will typically be collected in one security domain, then may be stored or exported to another. The signing is likely for the lifetime of the vCon, where the encryption may be shorter term or domain specific. vCons may be stored in unencrypted form, but the signed form MUST be maintained to ensure its integrity.

A encrypted vCon uses [JWE] and takes the General JWE JSON Serialization Syntax form as defined in section 7.2.1 of [JWE].

  • unprotected: "Unprotected"

  • recipients: "Recipient[]"

  • iv: "String"

The string value of iv is the Initialization Vector as constructed as defined in section 7.2.1 of [JWE].

  • ciphertext: "String"

The string value of ciphertext is constructed as defined in section 7.2.1 of [JWE] using the signed form of the vCon as the plaintext input for encryption.

  • tag: "String"

The string value of tag is the the Authentication Tag as defined in section 7.2.1 of [JWE].

5.3.1. Unprotected Object

  • cty: "String"

The string value of cty SHOULD be either "application/vcon" or "application/vcon+gzip"

  • enc: "String"

The string value of enc SHOULD be "A256CBC-HS512"

  • uuid: "String" (SHOULD be provided)

The string value of the UUID for the vCon contained in the ciphertext parameter. This is provided for identification of the encrypted vCon without the need of the key to decrypt the vCon. The value of this uuid parameter SHOULD be verified when the vCon is decrypted.

5.3.2. Recipient Object

  • header: "Header"

  • encrypted_key: "String"

The string value of encrypted_key is defined in section 7.2.1 of [JWE].

5.3.3. Header Object

  • alg: "String"

The string value of alg SHOULD be "RSA-OAEP".

5.4. Differentiation of vCon forms

vCons in the unsigned, signed and encrypted form are all valid JSON. A vCon in any of these forms may additionally be compressed using [GZIP] as described in Section 6.2. It is necessary to distinguish which form a vCon is in, and whether it is compressed, in order to properly handle it. For example a signed vCon needs to be verified. The following is the recommended approaches to identifying which form a particular vCon is in:

  • unsigned

    The presence of one or more of the following parameters indicates that the vCon is in the unsigned form:

    • parties

    • dialog

    • analysis

    • attachments

  • signed (JWS)

    The presence of both of the following parameters indicates that the vCon is in the signed (JWS) form:

    • payload

    • signatures

  • encrypted (JWE)

    The presence of both of the following parameters indicates that the vCon is in the encrypted (JWE) form:

    • ciphertext

    • recipients

A gzip compressed vCon is not JSON and is differentiated from the JSON forms before the above parameter based rules can be applied. The gzip compressed vCon SHOULD be identified by the media type "application/vcon+gzip" when a media type is available, such as in the [HTTPS] Content-Type header. When no media type is available, a gzip compressed vCon can be identified by the gzip member header magic numbers defined in section 2.3.1 of [GZIP]. Once decompressed, the contained vCon is in one of the JSON forms and is differentiated using the parameter based rules above.

6. IANA Considerations

This section includes the information required for IANA to register the application/vcon media type per [MEDIATYPE].

6.1. JSON Format vCon Mediatype

The JSON format for vCon is mandatory to implement.

  • Type name: application

  • Subtype name: vcon

  • Required parameters: N/A

  • Optional parameters: N/A; unrecognized parameters should be ignored.

  • Encoding considerations: 8bit

  • Additional information: [JSON] format

  • Security considerations: See Security Considerations section of this document.

  • Interoperability considerations: The vCon schema is defined in RFC XXXX. The schema may be extended through extensions as defined there.

  • Published specification: [VCON], this document: RFC XXXX

  • Applications that use this media type:

  • Fragment identifier considerations: N/A

  • Additional Information:

    • Deprecated alias names for this type: N/A

    • Magic number(s): N/A

    • File extension(s): "vcon"

    • Macintosh file type code(s): N/A

    • Windows Clipboard Name: VCON

  • Author: See the Author's Addresses section of this document.

  • Change controller: IETF

6.2. gzip Format vCon Mediatype

A gzip format vCon is a JSON format vCon that has been compressed using the gzip [GZIP] compression algorithm. The gzip format is used to reduce the size of potentially very large vCons containing audio or video media in dialog objects. Applications SHOULD support the receiving of gzip format vCons, but do not need to use the gzip format when sending.

  • Type name: application

  • Subtype name: vcon+gzip

  • Required parameters: N/A

  • Optional parameters: N/A; unrecognized parameters should be ignored.

  • Encoding considerations: binary

  • Additional information: [GZIP] compression of [JSON] format

  • Security considerations: See Security Considerations section of this document.

  • Interoperability considerations: The vCon schema is defined in RFC XXXX. The schema may be extended through extensions as defined there.

  • Published specification: [VCON], this document: RFC XXXX

  • Applications that use this media type:

  • Fragment identifier considerations: N/A

  • Additional Information:

    • Deprecated alias names for this type: N/A

    • Magic number(s): N/A

    • File extension(s): "vcon"

    • Macintosh file type code(s): N/A

    • Windows Clipboard Name: VCON

  • Author: See the Author's Addresses section of this document.

  • Change controller: IETF

6.3. vCon JSON Registry

This document defines a number of new IANA registries for the JSON vCon schema. Each Object (i.e. dict, map, dictionary) has its own registry of parameter names. All of those registries have the same registry template which is defined in the following subsection. When registering new entries, the following template should be used.

6.3.1. Object Registry Template

Parameter Name:

The string name of a parameter to be used within the Object. The name is case sensitive. Names may not match other registered names in a case-insensitive manner unless the Designated Experts state that there is a compelling reason to allow an exception.

Parameter Description:

Brief description of the parameter

Change Controller:

For Standards Track RFCs, list the "IESG". For others, give the name of the responsible party. Other details (e.g., postal address, email address, home page URI) may also be included.

Specification Document(s):

Reference to the document or documents that specify the parameter, preferably including URIs that can be used to retrieve copies of the documents. An indication of the relevant sections may also be included but is not required.

6.3.2. vCon Object Parameter Names Registry

The following defines the initial values for the vCon Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 2
Parameter Name Parameter Description Change Controller Specification Document(s)
vcon Schema version number IESG Section 4.1.1 RFC XXXX
uuid vCon instance UUID IESG Section 4.1.2 RFC XXXX
extensions list of extensions used IESG Section 4.1.3 RFC XXXX
critical list of incompatible extensions used IESG Section 4.1.4 RFC XXXX
created_at creation date IESG Section 4.1.5 RFC XXXX
updated_at modification date IESG Section 4.1.6 RFC XXXX
subject conversation subject IESG Section 4.1.7 RFC XXXX
redacted Redacted Object IESG Section 4.1.8 RFC XXXX
amended Amended Object IESG Section 4.1.8 RFC XXXX
group reserved for future extension IESG RFC XXXX
parties Party Objects array IESG Section 4.1.10 RFC XXXX
dialog Dialog Objects array IESG Section 4.1.11 RFC XXXX
analysis Analysis Objects array IESG Section 4.1.12 RFC XXXX
attachments Attachment Objects array IESG Section 4.1.13 RFC XXXX

6.3.3. Party Object Parameter Names Registry

The following defines the initial values for the Party Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 3
Parameter Name Parameter Description Change Controller Specification Document(s)
tel tel URL IESG Section 4.2.1 RFC XXXX
sip SIP URL IESG Section 4.2.1 RFC XXXX
stir STIR token IESG Section 4.2.3 RFC XXXX
mailto mailto URL IESG Section 4.2.4 RFC XXXX
name participant name IESG Section 4.2.5 RFC XXXX
validation validation method IESG Section 4.2.7 RFC XXXX
gmlpos participant geolocation IESG Section 4.2.8 RFC XXXX
civicaddress civic address IESG Section 4.2.9 RFC XXXX
uuid participant unique identifier IESG Section 4.2.10 RFC XXXX
type participant type IESG Section 4.2.11 RFC XXXX
org participant organization IESG Section 4.2.12 RFC XXXX
dept participant department IESG Section 4.2.13 RFC XXXX
did decentralized identifier IESG Section 4.2.6 RFC XXXX

6.3.4. Dialog Object Parameter Names Registry

The following defines the initial values for the Dialog Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 4
Parameter Name Parameter Description Change Controller Specification Document(s)
type dialog type name IESG Section 4.3.1 RFC XXXX
start dialog start time IESG Section 4.3.2 RFC XXXX
duration dialog duration period IESG Section 4.3.3 RFC XXXX
parties dialog parties list IESG Section 4.3.4 RFC XXXX
originator dialog originator party IESG Section 4.3.5 RFC XXXX
mediatype dialog content media type IESG Section 4.3.8 RFC XXXX
filename dialog content filename IESG Section 4.3.9 RFC XXXX
body dialog inline content IESG Section 4.3.10 RFC XXXX
encoding dialog inline content encoding IESG Section 4.3.10 RFC XXXX
url dialog referenced content URL IESG Section 4.3.10 RFC XXXX
content_hash dialog content hash IESG Section 4.3.10 RFC XXXX
disposition dialog disposition IESG Section 4.3.11 RFC XXXX
session_id RFC7989 session ID IESG Section 4.3.12 RFC XXXX
party_history dialog party events history IESG Section 4.3.13 RFC XXXX
transferee transferee party index IESG Section 4.3.14 RFC XXXX
transferor transferor party index IESG Section 4.3.14 RFC XXXX
transfer_target transfer target party index IESG Section 4.3.14 RFC XXXX
original original transfer dialog index IESG Section 4.3.14 RFC XXXX
consultation consultation`transfer dialog index IESG Section 4.3.14 RFC XXXX
target_dialog target_dialog transfer dialog index IESG Section 4.3.14 RFC XXXX
application dialog source application IESG Section 4.3.15 RFC XXXX
message_id dialog message id IESG Section 4.3.16 RFC XXXX
recordings multi recording dialog reference IESG Section 4.3.6 RFC XXXX
recording_set recording_set dialog reference IESG Section 4.3.7 RFC XXXX
6.3.4.1. Dialog Type Name Registry

This document defines a new registry for the token name values that are permitted as values to the dialog type (Section 4.3.1) parameter.

6.3.4.1.1. Dialog Type Name Registration Template

Dialog Type Name:

The string token name of a Dialog Object Type The name is case sensitive. Names may not match other registered names in a case-insensitive manner unless the Designated Experts state that there is a compelling reason to allow an exception.

Dialog Type Description:

Brief description of the Dialog Object type

Change Controller:

For Standards Track RFCs, list the "IESG". For others, give the name of the responsible party. Other details (e.g., postal address, email address, home page URI) may also be included.

Specification Document(s):

Reference to the document or documents that specify the parameter, preferably including URIs that can be used to retrieve copies of the documents. An indication of the relevant sections may also be included but is not required.

6.3.4.1.2. Dialog Type Name Registration Initial Values

The following table defines the initial values for the Dialog Object Types Registry.

Table 5
Dialog Type Name Dialog Type Description Change Controller Specification Document(s)
text text dialog IESG Section 4.3.1 RFC XXXX
recording recording dialog IESG Section 4.3.1 RFC XXXX
transfer transfer dialog IESG Section 4.3.1 RFC XXXX
incomplete incomplete dialog IESG Section 4.3.1 RFC XXXX
recording-set multi-recording dialog IESG Section 4.3.1 RFC XXXX

6.3.5. party_history Object Parameter Names Registry

This initial values for the party_history Object Parameter Names Registry are listed in the following table. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 6
Parameter Name Parameter Description Change Controller Specification Document(s)
party event party index IESG Section 4.3.13.1 RFC XXXX
time time event occurred IESG Section 4.3.13.1 RFC XXXX
event event type IESG Section 4.3.13.1 RFC XXXX
button button label character or string IESG Section 4.3.13.1 RFC XXXX
6.3.5.1. party_event Event Name Registry

This document defines a new registry for the token name values that are permitted as values to the party_event Object event (Section 4.3.13.1) parameter.

6.3.5.1.1. party_event Event Name Registration Template

party_event Event Name:

The string token name of a party_event Object event type. The name is case sensitive. Names may not match other registered names in a case-insensitive manner unless the Designated Experts state that there is a compelling reason to allow an exception.

party_event Event Description:

Brief description of the party_event Object Event

Change Controller:

For Standards Track RFCs, list the "IESG". For others, give the name of the responsible party. Other details (e.g., postal address, email address, home page URI) may also be included.

Specification Document(s):

Reference to the document or documents that specify the parameter, preferably including URIs that can be used to retrieve copies of the documents. An indication of the relevant sections may also be included but is not required.

6.3.5.1.2. party_event Type Name Registration Initial Values

The following table defines the initial values for the Dialog Object Types Registry.

Table 7
party_event Event Name party_event Event Description Change Controller Specification Document(s)
join party join event IESG Section 4.3.13.1 RFC XXXX
drop party drop event IESG Section 4.3.13.1 RFC XXXX
hold party on hold event IESG Section 4.3.13.1 RFC XXXX
unhold party off hold event IESG Section 4.3.13.1 RFC XXXX
mute party on mute event IESG Section 4.3.13.1 RFC XXXX
unmute party off mute event IESG Section 4.3.13.1 RFC XXXX
keydown DTMF/app key/button press event IESG Section 4.3.13.1 RFC XXXX
keyup DTMF/app key/button release event IESG Section 4.3.13.1 RFC XXXX

6.3.6. Attachment Object Parameter Names Registry

The following defines the initial values for the Attachment Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 8
Parameter Name Parameter Description Change Controller Specification Document(s)
purpose attachment object purpose description IESG Section 4.4.1 RFC XXXX
start attachment start time IESG Section 4.4.2 RFC XXXX
party sending party index IESG Section 4.4.3 RFC XXXX
dialog associated dialog index IESG Section 4.4.4 RFC XXXX
mediatype attachment body media type IESG Section 4.4.5 RFC XXXX
filename attachment content filename IESG Section 4.4.6 RFC XXXX
body attachment inline content IESG Section 4.4.7 RFC XXXX
encoding attachment inline content encoding IESG Section 4.4.7 RFC XXXX
url attachment referenced content URL IESG Section 4.4.7 RFC XXXX
content_hash attachment content hash IESG Section 4.4.7 RFC XXXX

6.3.7. Analysis Object Parameter Names Registry

The following defines the initial values for the Analysis Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 9
Parameter Name Parameter Description Change Controller Specification Document(s)
type analysis type IESG Section 4.5.1 RFC XXXX
dialog associated dialog index IESG Section 4.5.2 RFC XXXX
attachment associated attachment index IESG Section 4.5.3 RFC XXXX
mediatype analysis body media type IESG Section 4.5.4 RFC XXXX
filename analysis content filename IESG Section 4.5.5 RFC XXXX
vendor vendor producing content IESG Section 4.5.6 RFC XXXX
product vendor product producing content IESG Section 4.5.7 RFC XXXX
schema product schema of content IESG Section 4.5.8 RFC XXXX
body analysis inline content IESG Section 4.5.9 RFC XXXX
encoding analysis inline content encoding IESG Section 4.5.9 RFC XXXX
url analysis referenced content URL IESG Section 4.5.9 RFC XXXX
content_hash analysis content hash IESG Section 4.5.9 RFC XXXX

6.3.8. Redacted Object Parameter Names Registry

The following defines the initial values for the Redacted Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 10
Parameter Name Parameter Description Change Controller Specification Document(s)
uuid less redacted vCon UUID IESG Section 4.1.8.1 RFC XXXX
type redaction type or reason IESG Section 4.1.8.1 RFC XXXX
url referenced less redacted vCon URL IESG Section 4.1.8.1 RFC XXXX
content_hash less redacted vCon hash IESG Section 4.1.8.1 RFC XXXX

6.3.9. Amended Object Parameter Names Registry

The following defines the initial values for the Amended Object Parameter Names Registry. Use the template in Object Registry Template (Section 6.3.1) when registering additional entries to this table.

Table 11
Parameter Name Parameter Description Change Controller Specification Document(s)
uuid prior vCon version UUID IESG Section 4.1.9.1 RFC XXXX
url referenced prior version vCon URL IESG Section 4.1.9.1 RFC XXXX
content_hash prior version vCon hash IESG Section 4.1.9.1 RFC XXXX

6.4. vCon Extensions Names Registry

This document defines and new registry for the token name values that are permitted as values to the [extensions]s(#extensions) parameter. However it does not define any values for this registry. Values for this registry are to be defined in subsequent documents which define extensions to the vCon schema.

6.4.1. Extensions Registration Template

Extension Name:

The string token name of an extension to the vCon JSON schema. The name is case sensitive. Names may not match other registered names in a case-insensitive manner unless the Designated Experts state that there is a compelling reason to allow an exception.

Extension Description:

Brief description of the the vCon extension

Change Controller:

For Standards Track RFCs, list the "IESG". For others, give the name of the responsible party. Other details (e.g., postal address, email address, home page URI) may also be included.

Specification Document(s):

Reference to the document or documents that specify the parameter, preferably including URIs that can be used to retrieve copies of the documents. An indication of the relevant sections may also be included but is not required.

6.5. JSON Web Signature and Encryption Header Parameters

This document registers the following new parameter in the [JWS] JSON Web Signature and Encryption Header Parameters registry.

7. Non-Upward Compatible Changes to the vCon Container

7.1. Version 0.3.0 to 0.4.0

  • The "appended" Object was renamed to "amended"

  • The "must_support" parameter was renamed to "critical" to be consistent with other IETF JSON schema extension mechanisms.

  • The "session_id" Dialog Object parameter was changes from a String to a SessionId Object.

7.2. Version 0.0.2 to 0.3.0

  • "transfer-target" parameter was renamed to "transfer_target" to be consistent with other compound names that use the underscore ("_").

  • "target-dialog" parameter was renamed to "target_dialog" to be consistent with other compound names that use the underscore ("_").

7.3. Version 0.0.1 to 0.0.2

  • "mimetype" parameters were renamed to "mediatype"

  • "alg" and "signature" were combined into "content_hash"

8. References

8.1. Normative References

[DID]
W3C, "Decentralized Identifiers (DIDs) v1.0", , <https://www.w3.org/TR/did-core/>.
[GEOPRIV]
Peterson, J., "A Presence-based GEOPRIV Location Object Format", RFC 4119, DOI 10.17487/RFC4119, , <https://www.rfc-editor.org/rfc/rfc4119>.
[GZIP]
Deutsch, P., "GZIP file format specification version 4.3", RFC 1952, DOI 10.17487/RFC1952, , <https://www.rfc-editor.org/rfc/rfc1952>.
[H-460-27]
"End-to-End Session Identifier for H.323 Systems", H.460.27, , <https://www.itu.int/rec/T-REC-H.460.27>.
[HTTPS]
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., "HTTP Semantics", STD 97, RFC 9110, DOI 10.17487/RFC9110, , <https://www.rfc-editor.org/rfc/rfc9110>.
[IANA-COSE-ALG]
"COSE Algorithms", n.d., <<https://www.iana.org/assignments/cose/cose.xhtml>>.
[JMAP]
Jenkins, N. and C. Newman, "The JSON Meta Application Protocol (JMAP)", RFC 8620, DOI 10.17487/RFC8620, , <https://www.rfc-editor.org/rfc/rfc8620>.
[JSON]
Bray, T., Ed., "The JavaScript Object Notation (JSON) Data Interchange Format", STD 90, RFC 8259, DOI 10.17487/RFC8259, , <https://www.rfc-editor.org/rfc/rfc8259>.
[JWE]
Jones, M. and J. Hildebrand, "JSON Web Encryption (JWE)", RFC 7516, DOI 10.17487/RFC7516, , <https://www.rfc-editor.org/rfc/rfc7516>.
[JWS]
Jones, M., Bradley, J., and N. Sakimura, "JSON Web Signature (JWS)", RFC 7515, DOI 10.17487/RFC7515, , <https://www.rfc-editor.org/rfc/rfc7515>.
[MAILTO]
Duerst, M., Masinter, L., and J. Zawinski, "The 'mailto' URI Scheme", RFC 6068, DOI 10.17487/RFC6068, , <https://www.rfc-editor.org/rfc/rfc6068>.
[MEDIATYPE]
Freed, N., Klensin, J., and T. Hansen, "Media Type Specifications and Registration Procedures", BCP 13, RFC 6838, DOI 10.17487/RFC6838, , <https://www.rfc-editor.org/rfc/rfc6838>.
[MIME]
Freed, N. and N. Borenstein, "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies", RFC 2045, DOI 10.17487/RFC2045, , <https://www.rfc-editor.org/rfc/rfc2045>.
[PASSporT]
Wendt, C. and J. Peterson, "PASSporT: Personal Assertion Token", RFC 8225, DOI 10.17487/RFC8225, , <https://www.rfc-editor.org/rfc/rfc8225>.
[PIDF-LO]
Winterbottom, J., Thomson, M., and H. Tschofenig, "GEOPRIV Presence Information Data Format Location Object (PIDF-LO) Usage Clarification, Considerations, and Recommendations", RFC 5491, DOI 10.17487/RFC5491, , <https://www.rfc-editor.org/rfc/rfc5491>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/rfc/rfc2119>.
[RFC3339]
Klyne, G. and C. Newman, "Date and Time on the Internet: Timestamps", RFC 3339, DOI 10.17487/RFC3339, , <https://www.rfc-editor.org/rfc/rfc3339>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/rfc/rfc8174>.
[SESSION-ID]
Jones, P., Salgueiro, G., Pearce, C., and P. Giralt, "End-to-End Session Identification in IP-Based Multimedia Communication Networks", RFC 7989, DOI 10.17487/RFC7989, , <https://www.rfc-editor.org/rfc/rfc7989>.
[SMTP]
Klensin, J., "Simple Mail Transfer Protocol", RFC 5321, DOI 10.17487/RFC5321, , <https://www.rfc-editor.org/rfc/rfc5321>.
[TEL]
Schulzrinne, H., "The tel URI for Telephone Numbers", RFC 3966, DOI 10.17487/RFC3966, , <https://www.rfc-editor.org/rfc/rfc3966>.
[UUID]
Peabody, B. and K. R. Davis, "New UUID Formats", Work in Progress, Internet-Draft, draft-peabody-dispatch-new-uuid-format-04, , <https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format-04>.

8.2. Informative References

[CBOR]
Bormann, C. and P. Hoffman, "Concise Binary Object Representation (CBOR)", STD 94, RFC 8949, DOI 10.17487/RFC8949, , <https://www.rfc-editor.org/rfc/rfc8949>.
[CDDL]
Birkholz, H., Vigano, C., and C. Bormann, "Concise Data Definition Language (CDDL): A Notational Convention to Express Concise Binary Object Representation (CBOR) and JSON Data Structures", RFC 8610, DOI 10.17487/RFC8610, , <https://www.rfc-editor.org/rfc/rfc8610>.
[CDR]
ITU, "Recommendation Q.825: Specification of TMN applications at the Q3 interface: Call detail recording", n.d., <https://www.itu.int/rec/T-REC-Q.825>.
[ISOBMFF]
"Information technology -- Coding of audio-visual objects -- Part 12: ISO base media file format", ISO/IEC 14496-12:2022, , <https://www.iso.org/standard/83102.html>.
[JWT]
Jones, M., Bradley, J., and N. Sakimura, "JSON Web Token (JWT)", RFC 7519, DOI 10.17487/RFC7519, , <https://www.rfc-editor.org/rfc/rfc7519>.
[PY-VCON]
"Python open source vCon command line interface, library and workflow server", n.d., <https://github.com/py-vcon/py-vcon>.
[SHA-512]
Eastlake 3rd, D. and T. Hansen, "US Secure Hash Algorithms (SHA and SHA-based HMAC and HKDF)", RFC 6234, DOI 10.17487/RFC6234, , <https://www.rfc-editor.org/rfc/rfc6234>.
[SIP]
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, , <https://www.rfc-editor.org/rfc/rfc3261>.
[SIP-XFER]
Sparks, R., Johnston, A., Ed., and D. Petrie, "Session Initiation Protocol (SIP) Call Control - Transfer", BCP 149, RFC 5589, DOI 10.17487/RFC5589, , <https://www.rfc-editor.org/rfc/rfc5589>.
[STIR-PASS]
Wendt, C. and J. Peterson, "PASSporT Extension for Rich Call Data", Work in Progress, Internet-Draft, draft-ietf-stir-passport-rcd-26, , <https://datatracker.ietf.org/doc/html/draft-ietf-stir-passport-rcd-26>.
[vCard]
Kewisch, P., "jCard: The JSON Format for vCard", RFC 7095, DOI 10.17487/RFC7095, , <https://www.rfc-editor.org/rfc/rfc7095>.
[vCon-white-paper]
Howe, T., Petrie, D., Lieberman, M., and A. Quayle, "vCon: an Open Standard for Conversation Data", n.d., <https://github.com/vcon-dev/vcon/blob/main/docs/vCons_%20an%20Open%20Standard%20for%20Conversation%20Data.pdf>.

Appendix A. Example vCons

This appendix contains example vCons in the unsigned, signed and encrypted form. The JSON has been indented for readability. The vCons have been formatted such that long text lines have been wrapped with a left hand white space indent for readability purposes. Links for unformatted versions of the vCons are provided for each of the examples. The example vCons in this document were generated using the [PY-VCON] command line interface.

A.1. Two Party Call vCon With Inline Recording

This example vCon is for a simple 2 party PSTN call. It has a single Dialog Object which contains a single channel wav format recording with the two parties audio mixed into the single channel.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_int_rec.vcon

{
  "created_at": "2022-06-21T13:53:00-04:00",
  "parties": [
    {
      "tel": "+12345678901",
      "name": "Alice"
    },
    {
      "tel": "+19876543210",
      "name": "Bob"
    }
  ],
  "dialog": [
    {
      "type": "recording",
      "start": "2022-06-21T17:53:26.000+00:00",
      "duration": 4.72,
      "parties": [
        0,
        1
      ],
      "mediatype": "audio/x-wav",
      "filename": "ab_call.wav",
      "encoding": "base64url",
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    }
  ],
  "analysis": [],
  "attachments": [],
  "uuid": "01a07da3-661d-89b0-b9a2-279e0d16bc46"
}

A.2. Email Thread Multipart vCon

The following is an unsigned form of an vCon for a 2 message email thread between 2 parties. The email messages are multipart MIME message bodies.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_email_acct_prob_thread.vcon

{
  "parties": [
    {
      "mailto": "b@example.com",
      "name": "Bob"
    },
    {
      "mailto": "a@example.com",
      "name": "Alice"
    }
  ],
  "dialog": [
    {
      "type": "text",
      "start": "2022-09-23T21:44:25.000+00:00",
      "duration": 0,
      "parties": [
        0,
        1
      ],
      "mediatype": "multipart/mixed; \n\tboundary=\"----=_Part_38
        8314_1108189513.1663969465698\"",
      "encoding": "none",
      "body": "------=_Part_388314_1108189513.1663969465698\r\nCo
        ntent-Type: multipart/alternative;\r\n\tboundary=\"----=_
        Part_388313_805631480.1663969465697\"\r\n\r\n------=_Part
        _388313_805631480.1663969465697\r\nContent-Type: text/pla
        in; charset=UTF-8\r\nContent-Transfer-Encoding: 7bit\r\n\
        r\nAlice:Please find the image attached.\r\n\r\nRegards,B
        ob\r\n\r\n------=_Part_388313_805631480.1663969465697\r\n
        Content-Type: text/html; charset=UTF-8\r\nContent-Transfe
        r-Encoding: 7bit\r\n\r\n<html><head></head><body><div cla
        ss=\"yahoo-style-wrap\" style=\"font-family:Helvetica Neu
        e, Helvetica, Arial, sans-serif;font-size:16px;\"><div di
        r=\"ltr\" data-setdir=\"false\"><div><div dir=\"ltr\" sty
        le=\"font-family: &quot;Helvetica Neue&quot;, Helvetica,
        Arial, sans-serif; font-size: 16px;\">Alice:</div><div di
        r=\"ltr\" style=\"font-family: &quot;Helvetica Neue&quot;
        , Helvetica, Arial, sans-serif; font-size: 16px;\">Please
         find the image attached.<br></div><div dir=\"ltr\" style
        =\"font-family: &quot;Helvetica Neue&quot;, Helvetica, Ar
        ial, sans-serif; font-size: 16px;\"><br></div><div dir=\"
        ltr\" style=\"font-family: &quot;Helvetica Neue&quot;, He
        lvetica, Arial, sans-serif; font-size: 16px;\">Regards,</
        div><div dir=\"ltr\" style=\"font-family: &quot;Helvetica
         Neue&quot;, Helvetica, Arial, sans-serif; font-size: 16p
        x;\">Bob</div></div><br></div></div></body></html>\r\n---
        ---=_Part_388313_805631480.1663969465697--\r\n\r\n------=
        _Part_388314_1108189513.1663969465698\r\nContent-Type: im
        age/png\r\nContent-Transfer-Encoding: base64\r\nContent-D
        isposition: attachment; filename=\"=?UTF-8?b?c2NyZWVuc2hv
        dC5wbmc=?=\"\r\nContent-ID: <c4c28087-6fa1-395e-e50f-dcef
        d3d6bf96@yahoo.com>\r\n\r\niVBORw0KGgoAAAANSUhEUgAAACYAAA
        AeCAIAAADPdvs5AAAAA3NCSVQICAjb4U/gAAAAGXRFWHRT\r\nb2Z0d2F
        yZQBnbm9tZS1zY3JlZW5zaG907wO/PgAAALpJREFUSInl1t0NgzAMBOC7
        qPvP1gW6Qjdo\r\nj4f0J4qAJI6NROvniE8+mwCvtzv6imTnyf1K/UclH
        UFWjIvaIL3CHCABSPKKtJckWfY6zw+sj5dq\r\nISdVIzmj2klzTZG2Rm
        e7NKgOwY6qPrMcUs+2PqchL14P+oyz+fHx77K5Sv8xyxAyZ0uBaxn/Spc
        U\r\n8NxcosAut1Y3NtjVX7UjZlmpgWTSFyvVQPKB16tSqW53bFnKtyyZ
        vYT3rSsAWADWAlOjseYFfwAA\r\nAABJRU5ErkJggg==\r\n\r\n-----
        -=_Part_388314_1108189513.1663969465698--\r\n",
      "message_id": "<1126698042.388315.1663969465698@mail.yahoo.
        com>"
    },
    {
      "type": "text",
      "start": "2022-09-23T21:44:59.000+00:00",
      "duration": 0,
      "parties": [
        1,
        0
      ],
      "mediatype": "multipart/alternative; \n\tboundary=\"----=_P
        art_390234_811845464.1663969499935\"",
      "encoding": "none",
      "body": "------=_Part_390234_811845464.1663969499935\r\nCon
        tent-Type: text/plain; charset=UTF-8\r\nContent-Transfer-
        Encoding: 7bit\r\n\r\n Hi Bob:Got it. Thanks.\r\n\r\n
        On Friday, September 23, 2022, 9:44:40 PM UTC, Bob <b@exa
        mple.com> wrote:  \r\n \r\n Alice:Please find the image a
        ttached.\r\n\r\nRegards,Bob\r\n  \r\n------=_Part_390234_
        811845464.1663969499935\r\nContent-Type: text/html; chars
        et=UTF-8\r\nContent-Transfer-Encoding: 7bit\r\n\r\n<html>
        <head></head><body><div class=\"ydp89e479a0yahoo-style-wr
        ap\" style=\"font-family:Helvetica Neue, Helvetica, Arial
        , sans-serif;font-size:16px;\"><div></div>\r\n        <di
        v><div><div dir=\"ltr\" style=\"font-family: Helvetica Ne
        ue, Helvetica, Arial, sans-serif; font-size: 16px;\">Hi B
        ob:</div><div dir=\"ltr\" style=\"font-family: Helvetica
        Neue, Helvetica, Arial, sans-serif; font-size: 16px;\">Go
        t it. Thanks.</div></div><br></div><div><br></div>\r\n
             \r\n        </div><div id=\"ydpdc5150a3yahoo_quoted_
        4829810715\" class=\"ydpdc5150a3yahoo_quoted\">\r\n
              <div style=\"font-family:'Helvetica Neue', Helvetic
        a, Arial, sans-serif;font-size:13px;color:#26282a;\">\r\n
                        \r\n                <div>\r\n
                On Friday, September 23, 2022, 9:44:40 PM UTC, Bo
        b &lt;b@example.com&gt; wrote:\r\n                </div>\
        r\n                <div><br></div>\r\n                <di
        v><br></div>\r\n                <div><div id=\"ydpdc5150a
        3yiv4578005613\"><div><div style=\"font-family:Helvetica
        Neue, Helvetica, Arial, sans-serif;font-size:16px;\" clas
        s=\"ydpdc5150a3yiv4578005613yahoo-style-wrap\"><div dir=\
        "ltr\"><div><div dir=\"ltr\" style=\"font-family:Helvetic
        a, Arial, sans-serif;font-size:16px;\">Alice:</div><div d
        ir=\"ltr\" style=\"font-family:Helvetica, Arial, sans-ser
        if;font-size:16px;\">Please find the image attached.<br><
        /div><div dir=\"ltr\" style=\"font-family:Helvetica, Aria
        l, sans-serif;font-size:16px;\"><br></div><div dir=\"ltr\
        " style=\"font-family:Helvetica, Arial, sans-serif;font-s
        ize:16px;\">Regards,</div><div dir=\"ltr\" style=\"font-f
        amily:Helvetica, Arial, sans-serif;font-size:16px;\">Bob<
        /div></div><br></div></div></div></div></div>\r\n
            </div>\r\n        </div></body></html>\r\n------=_Par
        t_390234_811845464.1663969499935--\r\n",
      "message_id": "<2031327240.390235.1663969499936@mail.yahoo.
        com>"
    }
  ],
  "analysis": [],
  "attachments": [],
  "created_at": "2026-09-07T22:27:41.697+00:00",
  "subject": "Account problem",
  "uuid": "01a07dfb-fe0b-89ee-b9a2-279e0d16bc46"
}

A.3. Email Thread Text vCon

The following is an unsigned form of an vCon for a 3 message email thread between 2 parties. The email messages are plain text message bodies.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_email_prob_followup_text_thread.vcon

{
  "parties": [
    {
      "mailto": "a@example.com",
      "name": "Alice"
    },
    {
      "mailto": "b@example.com",
      "name": "Bob"
    }
  ],
  "dialog": [
    {
      "type": "text",
      "start": "2022-09-23T23:24:59.000+00:00",
      "duration": 0,
      "parties": [
        0,
        1
      ],
      "mediatype": "text/plain",
      "encoding": "none",
      "body": "Hi Bob:\nI just wanted to follow up to see that yo
        ur account is ok now.\n\nRegards,\nAlice\n\n",
      "message_id": "<2031327240.390235.1663969499936@mail.yahoo.
        com>"
    },
    {
      "type": "text",
      "start": "2022-09-23T23:34:32.000+00:00",
      "duration": 0,
      "parties": [
        1,
        0
      ],
      "mediatype": "text/plain; charset=UTF-8",
      "encoding": "none",
      "body": "Hi Alice:\nAll is fine. Thanks.\n\n    On Friday,
        September 23, 2022, 23:24:59 PM UTC, Alice <a@example.com
        > wrote:  \n \n  Hi Bob:\n  I just wanted to follow up to
         see that your account is ok now.\n  \n  Regards,\n  Alic
        e\n",
      "message_id": "<1126698042.388315.1663969465698@mail.yahoo.
        com>"
    },
    {
      "type": "text",
      "start": "2022-09-23T23:38:12.000+00:00",
      "duration": 0,
      "parties": [
        0,
        1
      ],
      "mediatype": "text/plain",
      "encoding": "none",
      "body": "Awesome!\n\n    On Friday, September 23, 2022, 23:
        34: PM UTC, Bob <b@example.com> wrote:  \n\n  Hi Alice:\n
          All is fine. Thanks.\n  \n      On Friday, September 23
        , 2022, 23:24:59 PM UTC, Alice <a@example.com> wrote:  \n
           \n    Hi Bob:\n    I just wanted to follow up to see t
        hat your account is ok now.\n    \n    Regards,\n    Alic
        e\n",
      "message_id": "<2031327240.390235.1663969499936@mail.yahoo.
        com>"
    }
  ],
  "analysis": [],
  "attachments": [],
  "created_at": "2026-09-07T22:32:08.133+00:00",
  "subject": "Account issue followup",
  "uuid": "01a07e00-0ecc-81db-b9a2-279e0d16bc46"
}

A.4. Two Party Call vCon With Externally Referenced Recording

This example vCon is for a simple 2 party PSTN call. It has a single Dialog Object which reference a single channel wav format recording with the two parties audio mixed into the single channel.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec.vcon

{
  "created_at": "2022-06-21T13:53:00-04:00",
  "parties": [
    {
      "tel": "+12345678901",
      "name": "Alice"
    },
    {
      "tel": "+19876543210",
      "name": "Bob"
    }
  ],
  "dialog": [
    {
      "type": "recording",
      "start": "2022-06-21T17:53:26.000+00:00",
      "duration": 33.12,
      "parties": [
        0,
        1
      ],
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A.5. Two Party Call vCon with Analysis

TODO: fix diarization in transcript

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec_analysis.vcon

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  "created_at": "2022-06-21T13:53:00-04:00",
  "parties": [
    {
      "tel": "+12345678901",
      "name": "Alice"
    },
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      "tel": "+19876543210",
      "name": "Bob"
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      "url": "https://github.com/ietf-wg-vcon/draft-ietf-vcon-vco
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      "mediatype": "audio/x-mp3",
      "filename": "ab_call.mp3",
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          "created": "2026-09-07T20:56:52.282Z",
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                          }
                        ],
                        "speaker": 0,
                        "num_words": 14,
                        "start": 1.1999999,
                        "end": 6.3199997
                      },
                      {
                        "sentences": [
                          {
                            "text": "I'd like to add Fu to my ser
                              vice.",
                            "start": 6.3199997,
                            "end": 8.799999
                          },
                          {
                            "text": "Okay.",
                            "start": 9.2,
                            "end": 9.839999
                          },
                          {
                            "text": "Can you give me your name an
                              d phone number so I can look up you
                              r account?",
                            "start": 10.16,
                            "end": 13.12
                          },
                          {
                            "text": "My name is Alice, and my num
                              ber is 1234567890.",
                            "start": 13.735,
                            "end": 20.615
                          },
                          {
                            "text": "Thank you.",
                            "start": 20.775,
                            "end": 21.654999
                          }
                        ],
                        "speaker": 0,
                        "num_words": 36,
                        "start": 6.3199997,
                        "end": 21.654999
                      },
                      {
                        "sentences": [
                          {
                            "text": "Okay.",
                            "start": 22.935,
                            "end": 23.335
                          },
                          {
                            "text": "I've added two to your servi
                              ce.",
                            "start": 24.134874,
                            "end": 25.734875
                          },
                          {
                            "text": "Is there anything else that
                              I can help you with?",
                            "start": 25.734875,
                            "end": 27.734875
                          },
                          {
                            "text": "No.",
                            "start": 28.054874,
                            "end": 28.534874
                          },
                          {
                            "text": "Thank you.",
                            "start": 28.534874,
                            "end": 29.334873
                          }
                        ],
                        "speaker": 0,
                        "num_words": 20,
                        "start": 22.935,
                        "end": 29.334873
                      },
                      {
                        "sentences": [
                          {
                            "text": "Goodbye.",
                            "start": 29.334875,
                            "end": 29.974874
                          },
                          {
                            "text": "Goodbye.",
                            "start": 30.374874,
                            "end": 31.014874
                          },
                          {
                            "text": "Have a nice day.",
                            "start": 31.014874,
                            "end": 31.894875
                          }
                        ],
                        "speaker": 0,
                        "num_words": 6,
                        "start": 29.334875,
                        "end": 31.894875
                      }
                    ]
                  }
                }
              ]
            }
          ]
        }
      },
      "encoding": "json",
      "vendor": "deepgram",
      "schema": "deepgram_prerecorded",
      "product": "transcription"
    }
  ],
  "attachments": [],
  "uuid": "01a07da8-c2bb-83e5-b9a2-279e0d16bc46"
}

A.6. Signed vCon

This example vCon is the signed form of the Two Party Call vCon With Externally Referenced Recording (Appendix A.4) example. The private key used to sign this can be found at:

https://raw.githubusercontent.com/vcon-dev/vcon/main/certs/fake_grp.key

The certificate chain is included in the x5c parameter of the header Object.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec_signed.vcon

{
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    ic2hhNTEyLUdMeTZJUGFJVU0xR3F6WnFmSVBabFdqYURzTmdOdlpNMGlDT05O
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    AxYTA3ZGE4LWMyYmItODNlNS1iOWEyLTI3OWUwZDE2YmM0NiJ9",
  "signatures": [
    {
      "header": {
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        "alg": "RS256",
        "uuid": "01a07da8-c2bb-83e5-b9a2-279e0d16bc46"
      },
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    }
  ]
}

A.7. Encrypted vCon

This example vCon is the encrypted form of the Signed vCon (Appendix A.6) example. The private key to decrypt it can be found at:

https://raw.githubusercontent.com/vcon-dev/vcon/main/certs/fake_grp.key

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec_encrypted.vcon

{
  "protected": "eyJhbGciOiJSU0EtT0FFUCIsImVuYyI6IkEyNTZDQkMtSFM1M
    TIifQ",
  "iv": "uoiDh-wFSrMHSrk2IMxaJQ",
  "ciphertext": "tOu0enZwzMiA2HROAVKsNOoG_GrrWrTNP2Ej5NFMKPDthCzg
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    l7bX3Ve2IPpRGqmhKIGWpwxcAC9ri_PeD1nGpbseiX7GQ0lP46PnMoi37--hG
    AvKcDm2jiWXABwIvGOrTyLzhWU8pKBseumajrT5l_ohQ87P_n7Xllsrz5FJcl
    lcg46NKOBmo08MGvU6nJOGW__4wgz2etzAiB2gBj36_-dF3tJmGTmpv99Rjns
    Zj4yT-NaFEVxXgqd3KKsm7vkuNx5B4e-IPtoQXkxVQlL1MGjYR7JLS5WeGoUl
    FyPFvoHEvOtSFJ5c-QlQ1zVhwZXYvsWEHcXzlhzT71Wqgr6hj_TcEo9Ob__DV
    jJPDeL7rtERyDU6eYrKxNuIewzdRyW7rB7NxI4u7aBvGnO-rX3c17LYYmTw3O
    7GMaPh1kcd21faUuqq6MycXYNCwZtMRVXiVqZVRQN6q53kylRlgMkf-I_VRqo
    hEP9GTORmvFklSJFzCM814-APDzNnvOSJ5cpoN3vUMabb5yJQvH1BlvuxhzgB
    H-j6QwkNLv6LnmEA2XZ_a7Ox6nualibKXMCR7wDGz8DoGSMFaaZF0M3voMJWe
    dmgQM2y5l2kvslMcKMAEHbVFZBSBjDswDoYZRfpnO13yfSveEo_CwXMSsd65m
    B4l8UQ0zOiVUAPAVQ1htGJSImQq59I6aoFFLawueWGaQSlR2b4hYWE8i5oCYx
    1nnmpDUniyFodagtIYNRsZOrcxSbY4czdKi02i3CUmD7QB_MrOcRVVGBEIa1P
    rAKmMWRyu3ePbVazMwigfVq9ghmJ3NFWI5IWp1t3DsprkADIkj_9le1stoNos
    Zo_ef7gee58_7vThYn0bf36CvlF8Bna-Ic4bsOa-7EXy27pt0aTNSMEIUPrTC
    nswHx5TTxzfD7MUvMzj6rqbOF3TgXODC7pXbZr7jO6-AqZBPW3Q9C7vAlPwh-
    WrO0nsk7ypZGdA1VXnNr3N9pcuy3PZPRkysG-xsoOLuW_stH2zeXYollPyQC2
    s_CnVcI0unYvmP6YkXVZHyip8dJlUVhAHMwSV8A5Wd5zVxOqQlxRJuev58gzM
    afjVW0kJFvOWuOrQh86rTna5PODGBOPepAmddRPFFMlRRphmWuCPRSOkKnVye
    gAxXNHNjc6F7zIdqODvzQxI2hNWPiQ8LmKoAYktbV8EsYVhdVt1X-tQEI34f2
    iKHckNHFllgXzqfRTcVeyG_Y9m7QuAPIGHt4qmTbybQ0MQGZO9IMvIEDkaySX
    mpwCfxhfkq6Vma29eCU1AobxEw-tZTZ9R9N0tjDuiUhRCGlANIWUd8QhpfTfT
    BRLyBrUjoq7n7LgAY28oc8CE_-3IQNBQeb4v6s84AKBEpWJt5kmluQLJZitHo
    UTTB425cbJhFDWyMKd-bU5iKflpndtuog-762r2x1gVFJaetGJsUg_o7Uass2
    Gfb5_jBBEDnrPhOaZauaXEsAKoCCjJE6f9ElTvM6CgEFebL1OtVkwlcXfN51-
    dwpnxVeKKQkU_Fqzu0YaPxllNzZZzXRjjAR1iLPHDoSNyd7X4C5xmNnr44gzc
    6Sg-rRzZ4VSljg6MVKkmsWJlIuNkR9jV4M_VOSCVLY9RP3UqTsHcUgZbGswIJ
    PJBpc3Hgurbh4YX0lI4o6O9my1XTrJv9ICm0ijbQM3X2nJF4Zv_vhvqp5Mtdm
    P0mDWi8QPs-ptZwFLE__LM3PV6joWd1nXq6TJ7EcrAX0zk6hTC-liXFncYfzR
    1nniq2pQGZLokC6NID41OEsXTcdJZt1t7yd8Xv1PgDXoRmEOTILaeUv4MDKEV
    d4pTwCRctDJmap_iycCK3YVsnMGmU0s55tDL1VwvocEMDu1TSJW0qrR4OAORU
    DYdWgZhuwodPrHywGqkt0Dqx1K93fuAO6HjmFZ0KXPGzrDFeSdWRvFVGgA5Y4
    V5IX0qpvSlUzscdgkNy6-3Gs",
  "tag": "U6W713kOK4_fPukH3d_b7Bx8-vIQnTNGePl21s_9SnM",
  "recipients": [
    {
      "header": {
        "enc": "A256CBC-HS512"
      },
      "encrypted_key": "VzWgir5UdrY9t2vhs55TuVLMZcOHKlEBPjrtDcl6R
        Rq1mHX_vTkgydEDZ-mgjOJ9f1HTMT0mvkoQUVNhApXO6ZcaRJGqYdESvC
        pYv-gS0uWeIciJjekGs78NuOaBT4gfppUUBerq3GkR6KbHO03RJ11-xi6
        sYXE6-i8nj7hgvIZNKmKiwPXV7y1OZRpdtt4PmG5IGQihf70M42Ib-l9-
        tD_MMpOBF3Jwfz4PCTPoUUnM6CVSzpOhV1xxcWPHGIWUgtdYJlufm2Ybw
        q4_kvwP-E8eKEaTSoXdvhQKdJ73E_dNcblo1ZsgAZSPOSmswMdiNbgMdb
        q9kaAVNbVYcZXD8Q"
    }
  ],
  "unprotected": {
    "uuid": "01a07da8-c2bb-83e5-b9a2-279e0d16bc46",
    "cty": "application/vcon+json",
    "enc": "A256CBC-HS512"
  }
}

A.8. Redacted vCon

This is an example redaction of the vCon in the example Two Party Call vCon With Externally Referenced Recording (Appendix A.4). Most notable is the Redacted object (Section 4.1.8) which references the lesser redacted version of this vCon. In addition the url parameter has been redacted from the Dialog Object (Section 4.3), but the rest of the Dialog Object (Section 4.3) was left in the redaction.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec_redacted.vcon

{
  "created_at": "2022-06-21T13:53:00-04:00",
  "parties": [
    {
      "name": "Alice"
    },
    {
      "name": "Bob"
    }
  ],
  "dialog": [
    {
      "type": "recording",
      "start": "2022-06-21T17:53:26.000+00:00",
      "duration": 33.12,
      "parties": [
        0,
        1
      ],
      "mediatype": "audio/x-mp3",
      "filename": "ab_call.mp3",
      "content_hash": "sha512-GLy6IPaIUM1GqzZqfIPZlWjaDsNgNvZM0iC
        ONNThnH0a75fhUM6cYzLZ5GynSURREvZwmOh54-2lRRieyj82UQ"
    }
  ],
  "analysis": [
    {
      "type": "transcript-redacted",
      "dialog": 0,
      "body": [
        {
          "parties": 0,
          "start": "2022-06-21T17:53:27.200000+00:00",
          "duration": 0.5600001000000001,
          "text": "Hello."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:27.760000+00:00",
          "duration": 1.6799997999999998,
          "text": "This is {{URL}}."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:29.440000+00:00",
          "duration": 0.8799999000000005,
          "text": "My name is Bob."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:30.320000+00:00",
          "duration": 1.2000002999999992,
          "text": "How can I help you?"
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:31.600000+00:00",
          "duration": 0.7199997000000007,
          "text": "Hi."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:32.320000+00:00",
          "duration": 2.4799992999999994,
          "text": "I'd like to add Fu to my service."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:35.200000+00:00",
          "duration": 0.6399990000000013,
          "text": "{{US_STATE}}."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:36.160000+00:00",
          "duration": 2.959999999999999,
          "text": "Can you give me your name and phone number so
            I can look up your account?"
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:39.735000+00:00",
          "duration": 6.879999999999999,
          "text": "My name is Alice, and my number is {{BAN}}."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:46.775000+00:00",
          "duration": 0.8799990000000015,
          "text": "Thank you."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:48.935000+00:00",
          "duration": 0.40000000000000213,
          "text": "{{US_STATE}}."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:50.134874+00:00",
          "duration": 1.600000999999999,
          "text": "I've added two to your service."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:51.734875+00:00",
          "duration": 2,
          "text": "Is there anything else that I can help you wit
            h?"
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:54.054874+00:00",
          "duration": 0.4799999999999969,
          "text": "No."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:54.534874+00:00",
          "duration": 0.7999990000000032,
          "text": "Thank you."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:55.334875+00:00",
          "duration": 0.6399989999999995,
          "text": "Goodbye."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:56.374874+00:00",
          "duration": 0.6400000000000006,
          "text": "Goodbye."
        },
        {
          "parties": 0,
          "start": "2022-06-21T17:53:57.014874+00:00",
          "duration": 0.880001,
          "text": "Have a nice day."
        }
      ],
      "encoding": "json",
      "vendor": "CapitalOne",
      "schema": "data_labeler_schema",
      "product": "dataprofiler"
    }
  ],
  "attachments": [],
  "uuid": "01928e10-193e-8231-b9a2-279e0d16bc46",
  "redacted": {
    "uuid": "01a07da8-c2bb-83e5-b9a2-279e0d16bc46",
    "type": "PII Redaction"
  }
}

A.9. Amended Signed vCon

This is an example vCon with an Amended Object (Section 4.1.9) referencing the vCon that it amends or adds additional content. In this case it is referencing the signed vCon example above. An example text Dialog Object (index 1) is the amendment.

The unformatted version of the following example can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/examples/ab_call_ext_rec_amended.vcon

{
  "created_at": "2022-06-21T13:53:00-04:00",
  "parties": [
    {
      "tel": "+12345678901",
      "name": "Alice"
    },
    {
      "tel": "+19876543210",
      "name": "Bob"
    }
  ],
  "dialog": [
    {
      "type": "recording",
      "start": "2022-06-21T17:53:26.000+00:00",
      "duration": 33.12,
      "parties": [
        0,
        1
      ],
      "url": "https://github.com/ietf-wg-vcon/draft-ietf-vcon-vco
        n-core/raw/refs/heads/main/examples/ab_call.mp3",
      "mediatype": "audio/x-mp3",
      "filename": "ab_call.mp3",
      "content_hash": "sha512-GLy6IPaIUM1GqzZqfIPZlWjaDsNgNvZM0iC
        ONNThnH0a75fhUM6cYzLZ5GynSURREvZwmOh54-2lRRieyj82UQ"
    },
    {
      "type": "text",
      "start": "2022-06-21T17:53:26.000+00:00",
      "parties": [
        1,
        0
      ],
      "mediatype": "text/plain",
      "body": "Good day!",
      "encoding": "none"
    }
  ],
  "analysis": [],
  "attachments": [],
  "uuid": "01a07da8-c5c1-8db4-a20f-d188127fad29",
  "amended": {
    "uuid": "01a07da8-c2bb-83e5-b9a2-279e0d16bc46"
  }
}

TODO: recording-set example with party_history

Appendix B. vCon JSON Schema

This JSON schema is provided as informational. The text in sections 1-6 of this document define the normative definition of the vCon schema. If the JSON schema provided below differs from that in the text of the above sections, the text should be taken as the definitive definition and the JSON Schema below should be consider incorrect.

The JSON Schema definition below has been formatted with line breaks to print nicely on the page. The unformatted version of the JSON schema can be downloaded from: https://raw.githubusercontent.com/ietf-wg-vcon/draft-ietf-vcon-vcon-core/refs/heads/main/vcon_json_schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://ietf.org/vcon/schemas/unsigned-vcon.json",
  "title": "vCon - Unsigned Form",
  "description": "JSON schema for the unsigned form of vCon (Conv
    ersational Data Container) as defined in RFCXXXX",
  "type": "object",
  "required": [
    "uuid",
    "created_at"
  ],
  "properties": {
    "vcon": {
      "type": "string",
      "description": "DEPRECATED: Syntactic version of the JSON f
        ormat. This was used to indicate schema changes in the In
        ternet-Draft versions",
      "const": "0.4.0"
    },
    "uuid": {
      "type": "string",
      "description": "Globally unique identifier for the vCon. SH
        OULD be a version 8 UUID",
      "format": "uuid"
    },
    "extensions": {
      "type": "array",
      "description": "List of names of all vCon extensions used b
        y this vCon",
      "items": {
        "type": "string"
      }
    },
    "critical": {
      "type": "array",
      "description": "List of extension names that a consumer MUS
        T support to safely process this vCon",
      "items": {
        "type": "string"
      }
    },
    "created_at": {
      "type": "string",
      "description": "Creation time of this vCon in RFC3339 forma
        t",
      "format": "date-time"
    },
    "updated_at": {
      "type": "string",
      "description": "Last modified time of this vCon in RFC3339
        format",
      "format": "date-time"
    },
    "subject": {
      "type": "string",
      "description": "Subject or topic of the conversation"
    },
    "redacted": {
      "type": "object",
      "description": "Reference to the unredacted or less redacte
        d vCon prior instance",
      "required": [
        "type"
      ],
      "properties": {
        "uuid": {
          "type": "string",
          "description": "UUID of the unredacted or less redacted
             vCon prior instance",
          "format": "uuid"
        },
        "type": {
          "type": "string",
          "description": "Type of redaction performed"
        },
        "url": {
          "type": "string",
          "description": "HTTPS URL where the referenced vCon is
            stored",
          "format": "uri"
        },
        "content_hash": {
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ],
          "description": "Hash(es) of the external content using
            format: algorithm-base64url_encoded_hash"
        }
      },
      "dependencies": {
        "url": [
          "content_hash"
        ]
      }
    },
    "amended": {
      "type": "object",
      "description": "Reference to the prior vCon instance versio
        n that this vCon amends",
      "properties": {
        "uuid": {
          "type": "string",
          "description": "UUID of the prior vCon instance version
            ",
          "format": "uuid"
        },
        "url": {
          "type": "string",
          "description": "HTTPS URL where the referenced vCon is
            stored",
          "format": "uri"
        },
        "content_hash": {
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ],
          "description": "Hash(es) of the external content (requi
            red if url is provided)"
        }
      },
      "dependencies": {
        "url": [
          "content_hash"
        ]
      },
      "if": {
        "not": {
          "required": [
            "url"
          ]
        }
      },
      "then": {
        "required": [
          "uuid"
        ],
        "$comment": "uuid is optional only if an external referen
          ce is provided"
      }
    },
    "parties": {
      "type": "array",
      "description": "Array of Party Objects representing all par
        ties involved in the conversation",
      "items": {
        "$ref": "#/definitions/Party"
      }
    },
    "dialog": {
      "type": "array",
      "description": "Array of Dialog Objects containing the capt
        ured conversation content",
      "items": {
        "$ref": "#/definitions/Dialog"
      }
    },
    "analysis": {
      "type": "array",
      "description": "Array of Analysis Objects containing analys
        is performed on the conversational data",
      "items": {
        "$ref": "#/definitions/Analysis"
      }
    },
    "attachments": {
      "type": "array",
      "description": "Array of Attachment Objects for ancillary d
        ocuments related to the conversation",
      "items": {
        "$ref": "#/definitions/Attachment"
      }
    }
  },
  "definitions": {
    "Party": {
      "type": "object",
      "description": "Represents a party involved in the conversa
        tion",
      "properties": {
        "tel": {
          "type": "string",
          "description": "TEL URL (RFC3966) for the party"
        },
        "sip": {
          "type": "string",
          "description": "SIP URL for the party"
        },
        "stir": {
          "type": "string",
          "description": "STIR PASSporT in JWS Compact Serializat
            ion form"
        },
        "mailto": {
          "type": "string",
          "description": "Email address for the party in any comm
            on form, including a bare address or a MAILTO URL"
        },
        "name": {
          "type": "string",
          "description": "Name of the party"
        },
        "did": {
          "type": "string",
          "description": "Decentralized Identifier (DID) URI for
            the party"
        },
        "validation": {
          "type": "string",
          "description": "Label or token identifying the method o
            f identity validation used"
        },
        "gmlpos": {
          "type": "string",
          "description": "Geographic location in GML pos format (
            latitude longitude)"
        },
        "civicaddress": {
          "$ref": "#/definitions/Civicaddress"
        },
        "uuid": {
          "type": "string",
          "description": "Free form unique identifier for the par
            ticipant; not constrained to UUID syntax"
        },
        "type": {
          "type": "string",
          "description": "Participant type"
        },
        "org": {
          "type": "string",
          "description": "Organization to which the party belongs
            "
        },
        "dept": {
          "type": "string",
          "description": "Department to which the party belongs"
        }
      }
    },
    "Civicaddress": {
      "type": "object",
      "description": "Civic address information for a party's loc
        ation",
      "properties": {
        "country": {
          "type": "string"
        },
        "a1": {
          "type": "string",
          "description": "National subdivision (state/province)"
        },
        "a2": {
          "type": "string",
          "description": "County/parish/district"
        },
        "a3": {
          "type": "string",
          "description": "City/township"
        },
        "a4": {
          "type": "string",
          "description": "City division/borough"
        },
        "a5": {
          "type": "string",
          "description": "Neighborhood/block"
        },
        "a6": {
          "type": "string",
          "description": "Street"
        },
        "prd": {
          "type": "string",
          "description": "Leading street direction"
        },
        "pod": {
          "type": "string",
          "description": "Trailing street suffix"
        },
        "sts": {
          "type": "string",
          "description": "Street suffix"
        },
        "hno": {
          "type": "string",
          "description": "House number"
        },
        "hns": {
          "type": "string",
          "description": "House number suffix"
        },
        "lmk": {
          "type": "string",
          "description": "Landmark"
        },
        "loc": {
          "type": "string",
          "description": "Additional location info"
        },
        "flr": {
          "type": "string",
          "description": "Floor"
        },
        "nam": {
          "type": "string",
          "description": "Name/occupant"
        },
        "pc": {
          "type": "string",
          "description": "Postal code"
        }
      }
    },
    "Dialog": {
      "type": "object",
      "description": "Represents a segment of captured conversati
        on",
      "required": [
        "type"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "recording",
            "text",
            "transfer",
            "incomplete",
            "recording-set"
          ],
          "description": "Type of dialog"
        },
        "start": {
          "type": "string",
          "format": "date-time",
          "description": "Start time of the dialog in RFC3339 for
            mat; SHOULD be present unless not known; optional for
             transfer type"
        },
        "duration": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0
            },
            {
              "type": "number",
              "minimum": 0
            }
          ],
          "description": "Duration in seconds"
        },
        "parties": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0
            },
            {
              "type": "array",
              "items": {
                "type": "integer",
                "minimum": 0
              }
            },
            {
              "type": "array",
              "items": {
                "anyOf": [
                  {
                    "type": "integer",
                    "minimum": 0
                  },
                  {
                    "type": "array",
                    "items": {
                      "type": "integer",
                      "minimum": 0
                    }
                  },
                  {
                    "type": "null"
                  }
                ]
              }
            }
          ],
          "description": "Index/indices of parties in the parties
             array; SHOULD be present for recording, recording-se
            t and text types; MUST NOT be present for transfer ty
            pe"
        },
        "originator": {
          "type": "integer",
          "minimum": 0,
          "description": "Index of the originating party if first
             party is not the originator"
        },
        "recordings": {
          "type": "array",
          "items": {
            "type": "integer",
            "minimum": 0
          },
          "description": "recording-set reference to list of indi
            ces to recording Dialog Objects"
        },
        "recording_set": {
          "type": "integer",
          "minimum": 0,
          "description": "Index of the recording-set Dialog Objec
            t that this recording is a part of"
        },
        "mediatype": {
          "type": "string",
          "description": "Media type of the dialog content; MUST
            be present for inline content; not required when Dial
            og Content is absent"
        },
        "filename": {
          "type": "string",
          "description": "Original filename of the dialog content
            "
        },
        "body": {
          "description": "Inline content of the dialog (for inlin
            e files).  Any type for encoding=json, otherwise it m
            ust be a string."
        },
        "encoding": {
          "type": "string",
          "enum": [
            "base64url",
            "json",
            "none"
          ],
          "description": "Encoding type for inline content"
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL for externally referenced con
            tent"
        },
        "content_hash": {
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ],
          "description": "Hash(es) of external content"
        },
        "disposition": {
          "type": "string",
          "enum": [
            "no-answer",
            "congestion",
            "failed",
            "busy",
            "hung-up",
            "voicemail-no-message"
          ],
          "description": "Reason the call or conversation failed
            (required for incomplete type); \"failed\" SHOULD be
            used when the reason is not known"
        },
        "session_id": {
          "anyOf": [
            {
              "$ref": "#/definitions/SessionId"
            },
            {
              "type": "array",
              "items": {
                "$ref": "#/definitions/SessionId"
              }
            },
            {
              "type": "array",
              "items": {
                "oneOf": [
                  {
                    "$ref": "#/definitions/SessionId"
                  },
                  {
                    "type": "array",
                    "items": {
                      "$ref": "#/definitions/SessionId"
                    }
                  }
                ]
              }
            }
          ],
          "description": "Session ID(s) for the dialog"
        },
        "party_history": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/PartyHistory"
          },
          "description": "History of party join/drop/hold/mute ev
            ents"
        },
        "transferee": {
          "type": "integer",
          "minimum": 0,
          "description": "Party index of the transferee (for tran
            sfer type)"
        },
        "transferor": {
          "type": "integer",
          "minimum": 0,
          "description": "Party index of the transferor (for tran
            sfer type)"
        },
        "transfer_target": {
          "type": "integer",
          "minimum": 0,
          "description": "Party index of the transfer target (for
             transfer type)"
        },
        "original": {
          "type": "integer",
          "minimum": 0,
          "description": "Dialog index of the original call (for
            transfer type); may reference a recording, recording-
            set or text type Dialog Object"
        },
        "consultation": {
          "type": "integer",
          "minimum": 0,
          "description": "Dialog index of the consultation call (
            for transfer type); may reference a recording, record
            ing-set, text or incomplete type Dialog Object"
        },
        "target_dialog": {
          "type": "integer",
          "minimum": 0,
          "description": "Dialog index of the target call (for tr
            ansfer type); may reference a recording, recording-se
            t, text or incomplete type Dialog Object"
        },
        "application": {
          "type": "string",
          "description": "Application, communication channel or c
            ontext of the conversation"
        },
        "message_id": {
          "type": "string",
          "description": "Unique message identifier from the mess
            aging system"
        }
      },
      "dependencies": {
        "url": [
          "content_hash"
        ]
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "type": {
                "const": "incomplete"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "required": [
              "disposition"
            ]
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "recording-set"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "required": [
              "recordings"
            ]
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "transfer"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "not": {
              "anyOf": [
                {
                  "required": [
                    "parties"
                  ]
                },
                {
                  "required": [
                    "originator"
                  ]
                },
                {
                  "required": [
                    "session_id"
                  ]
                },
                {
                  "required": [
                    "party_history"
                  ]
                },
                {
                  "required": [
                    "message_id"
                  ]
                },
                {
                  "required": [
                    "recordings"
                  ]
                },
                {
                  "required": [
                    "recording_set"
                  ]
                },
                {
                  "required": [
                    "mediatype"
                  ]
                },
                {
                  "required": [
                    "filename"
                  ]
                },
                {
                  "required": [
                    "body"
                  ]
                },
                {
                  "required": [
                    "encoding"
                  ]
                },
                {
                  "required": [
                    "url"
                  ]
                },
                {
                  "required": [
                    "content_hash"
                  ]
                }
              ]
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "recording-set"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "not": {
              "anyOf": [
                {
                  "required": [
                    "message_id"
                  ]
                },
                {
                  "required": [
                    "recording_set"
                  ]
                },
                {
                  "required": [
                    "mediatype"
                  ]
                },
                {
                  "required": [
                    "filename"
                  ]
                },
                {
                  "required": [
                    "body"
                  ]
                },
                {
                  "required": [
                    "encoding"
                  ]
                },
                {
                  "required": [
                    "url"
                  ]
                },
                {
                  "required": [
                    "content_hash"
                  ]
                },
                {
                  "required": [
                    "transferee"
                  ]
                },
                {
                  "required": [
                    "transferor"
                  ]
                },
                {
                  "required": [
                    "transfer_target"
                  ]
                },
                {
                  "required": [
                    "original"
                  ]
                },
                {
                  "required": [
                    "consultation"
                  ]
                },
                {
                  "required": [
                    "target_dialog"
                  ]
                }
              ]
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "incomplete"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "not": {
              "anyOf": [
                {
                  "required": [
                    "message_id"
                  ]
                },
                {
                  "required": [
                    "recordings"
                  ]
                },
                {
                  "required": [
                    "recording_set"
                  ]
                },
                {
                  "required": [
                    "mediatype"
                  ]
                },
                {
                  "required": [
                    "filename"
                  ]
                },
                {
                  "required": [
                    "body"
                  ]
                },
                {
                  "required": [
                    "encoding"
                  ]
                },
                {
                  "required": [
                    "url"
                  ]
                },
                {
                  "required": [
                    "content_hash"
                  ]
                },
                {
                  "required": [
                    "transferee"
                  ]
                },
                {
                  "required": [
                    "transferor"
                  ]
                },
                {
                  "required": [
                    "transfer_target"
                  ]
                },
                {
                  "required": [
                    "original"
                  ]
                },
                {
                  "required": [
                    "consultation"
                  ]
                },
                {
                  "required": [
                    "target_dialog"
                  ]
                }
              ]
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "recording"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "not": {
              "anyOf": [
                {
                  "required": [
                    "recordings"
                  ]
                },
                {
                  "required": [
                    "transferee"
                  ]
                },
                {
                  "required": [
                    "transferor"
                  ]
                },
                {
                  "required": [
                    "transfer_target"
                  ]
                },
                {
                  "required": [
                    "original"
                  ]
                },
                {
                  "required": [
                    "consultation"
                  ]
                },
                {
                  "required": [
                    "target_dialog"
                  ]
                }
              ]
            }
          }
        },
        {
          "if": {
            "properties": {
              "type": {
                "const": "text"
              }
            },
            "required": [
              "type"
            ]
          },
          "then": {
            "not": {
              "anyOf": [
                {
                  "required": [
                    "recordings"
                  ]
                },
                {
                  "required": [
                    "recording_set"
                  ]
                },
                {
                  "required": [
                    "transferee"
                  ]
                },
                {
                  "required": [
                    "transferor"
                  ]
                },
                {
                  "required": [
                    "transfer_target"
                  ]
                },
              {
                  "required": [
                    "original"
                  ]
                },
                {
                  "required": [
                    "consultation"
                  ]
                },
                {
                  "required": [
                    "target_dialog"
                  ]
                }
              ]
            }
          }
        },
        {
          "if": {
            "required": [
              "body"
            ],
            "properties": {
              "body": {
                "not": {
                  "const": ""
                }
              }
            }
          },
          "then": {
            "required": [
              "encoding"
            ]
          }
        },
        {
          "if": {
            "required": [
              "body"
            ],
            "properties": {
              "body": {
                "not": {
                  "const": ""
                }
              }
            }
          },
          "then": {
            "required": [
              "mediatype"
            ]
          }
        }
      ]
    },
    "SessionId": {
      "type": "object",
      "description": "Session identifier with local and remote UU
        IDs",
      "properties": {
        "local": {
          "type": "string",
          "description": "Local UUID for the session"
        },
        "remote": {
          "type": "string",
          "description": "Remote UUID for the session"
        }
      }
    },
    "PartyHistory": {
      "type": "object",
      "description": "Records party events during the dialog",
      "required": [
        "party",
        "time",
        "event"
      ],
      "properties": {
        "party": {
          "type": "integer",
          "minimum": 0,
          "description": "Index of the party"
        },
        "time": {
          "type": "string",
          "format": "date-time",
          "description": "Time of the event in RFC3339 format"
        },
        "event": {
          "type": "string",
          "enum": [
            "join",
            "drop",
            "hold",
            "unhold",
            "mute",
            "unmute",
            "keydown",
            "keyup"
          ],
          "description": "Type of event"
        },
        "button": {
          "type": "string",
          "description": "DTMF digit, character or string (requir
            ed for keydown/keyup events)"
        }
      },
      "if": {
        "properties": {
          "event": {
            "enum": [
              "keydown",
              "keyup"
            ]
          }
        },
        "required": [
          "event"
        ]
      },
      "then": {
        "required": [
          "button"
        ]
      }
    },
    "Attachment": {
      "type": "object",
      "description": "Represents an ancillary document related to
         the conversation",
      "required": [
        "start",
        "party",
        "dialog"
      ],
      "properties": {
        "purpose": {
          "type": "string",
          "description": "text description of what the attachment
             is for"
        },
        "start": {
          "type": "string",
          "format": "date-time",
          "description": "Time the attachment was sent/exchanged
            in RFC3339 format"
        },
        "party": {
          "type": "integer",
          "minimum": 0,
          "description": "Index of the party that contributed the
             attachment"
        },
        "dialog": {
          "type": "integer",
          "minimum": 0,
          "description": "Index of the dialog this attachment is
            part of"
        },
        "mediatype": {
          "type": "string",
          "description": "Media type of the attachment content; M
            UST be present for inline content; not required when
            Attachment Content is absent"
        },
        "filename": {
          "type": "string",
          "description": "Original filename of the attachment"
        },
        "body": {
          "description": "Inline content of the attachment (for i
            nline files).  Any type for encoding=json, otherwise
            it must be a string."
        },
        "encoding": {
          "type": "string",
          "enum": [
            "base64url",
            "json",
            "none"
          ],
          "description": "Encoding type for inline content"
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL for externally referenced att
            achment"
        },
        "content_hash": {
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ],
          "description": "Hash(es) of external content"
        }
      },
      "dependencies": {
        "url": [
          "content_hash"
        ]
      },
      "allOf": [
        {
          "if": {
            "required": [
              "body"
            ],
            "properties": {
              "body": {
                "not": {
                  "const": ""
                }
              }
            }
          },
          "then": {
            "required": [
              "encoding"
            ]
          }
        },
        {
          "if": {
            "required": [
              "body"
            ],
            "properties": {
              "body": {
                "not": {
                  "const": ""
                }
              }
            }
          },
          "then": {
            "required": [
              "mediatype"
            ]
          }
        }
      ]
    },
    "Analysis": {
      "type": "object",
      "description": "Represents analysis performed on the conver
        sational data",
      "required": [
        "type",
        "vendor"
      ],
      "properties": {
        "type": {
          "type": "string",
          "description": "Semantic type of analysis (e.g., report
            , sentiment, summary, transcript, translation, tts)"
        },
        "dialog": {
          "oneOf": [
            {
              "type": "integer",
              "minimum": 0
            },
            {
              "type": "array",
              "items": {
                "type": "integer",
                "minimum": 0
              }
            }
          ],
          "description": "Index/indices of dialog objects this an
            alysis is based on"
        },
        "attachment": {
          "oneOf": [
            {
              "type": "integer",
              "minimum": 0
            },
            {
              "type": "array",
              "items": {
                "type": "integer",
                "minimum": 0
              }
            }
          ],
          "description": "Index/indices of attachment objects thi
            s analysis is based on"
        },
        "mediatype": {
          "type": "string",
          "description": "Media type of the analysis content; SHO
            ULD be provided for inline content and for external c
            ontent without an HTTPS Content-Type header; when no
            media type is defined for the data format, the vendor
            , product and schema parameters SHOULD identify the f
            ormat instead"
        },
        "filename": {
          "type": "string",
          "description": "Original filename of the analysis data"
        },
        "vendor": {
          "type": "string",
          "description": "Vendor or product name that generated t
            he analysis"
        },
        "product": {
          "type": "string",
          "description": "Product name to differentiate from othe
            r vendor products"
        },
        "schema": {
          "type": "string",
          "description": "Token or label for the data format/sche
            ma of the analysis"
        },
        "body": {
          "description": "Inline content of the analysis (for inl
            ine files).  Any type for encoding=json, otherwise it
             must be a string."
        },
        "encoding": {
          "type": "string",
          "enum": [
            "base64url",
            "json",
            "none"
          ],
          "description": "Encoding type for inline content"
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL for externally referenced ana
            lysis"
        },
        "content_hash": {
          "oneOf": [
            {
              "type": "string"
            },
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            }
          ],
          "description": "Hash(es) of external content"
        }
      },
      "dependencies": {
        "url": [
          "content_hash"
        ]
      },
      "allOf": [
        {
          "if": {
            "required": [
              "body"
            ],
            "properties": {
              "body": {
                "not": {
                  "const": ""
                }
              }
            }
          },
          "then": {
            "required": [
              "encoding"
            ]
          }
        }
      ]
    }
  },
  "not": {
    "required": [
      "redacted",
      "amended"
    ],
    "$comment": "The redacted and amended parameters are mutually
       exclusive"
  },
  "$comment": "At least one of the parties, dialog, analysis or a
    ttachments parameters SHOULD be present (RFCXXXX Section 4).
    SHOULD-level statements are not enforced by this schema."
}

Appendix C. vCon CDDL

This CDDL for vCon core is provided as informational. The text in sections 1-6 of this document define the normative definition of the vCon CDDL. If the CDDL provided below differs or conflicts from that in the text of the above sections, the text should be taken as the definitive definition and the CDDL below should be consider incorrect.

; CDDL for the JSON vCon - Conversation Data Container
; Generated from the prose of draft-ietf-vcon-vcon-core
; (syntax version 0.4.0).
; The prose of the draft is normative.
; This CDDL is informative.
; Constraints that cannot be expressed in CDDL are stated in
; comments.
; Note: the extension parameter wildcard (* tstr => any) means the
; per-type parameter prohibitions in this CDDL are advisory; a
; prohibited parameter matches the wildcard.  The prose and Table 1
; of the draft are definitive.

; A vCon JSON object is in one of three forms (Section 3):
; unsigned, signed (JWS) or encrypted (JWE).

vcon = unsigned_vcon_type / signed_vcon_type / encrypted_vcon_type

; Unsigned form of vCon Object (Section 4)
;_________________________________________

unsigned_vcon_type = {
    ; DEPRECATED (Section 4.1.1)
    ? "vcon": "0.4.0",
    uuid: uuid_value_type,                   ; Section 4.1.2
    ? extensions: [* tstr],                  ; Section 4.1.3
    ? critical: [* tstr],                    ; Section 4.1.4
    created_at: date_type,                   ; Section 4.1.5
    ? updated_at: date_type,                 ; Section 4.1.6
    ? subject: tstr,                         ; Section 4.1.7
    ? ( redacted: redacted_object_type //    ; Section 4.1.8
        amended: amended_object_type ),      ; Section 4.1.9
    ; at least one of parties, dialog, analysis or attachments
    ; SHOULD be present (Section 4)
    ? parties: [* party_object_type],        ; Section 4.1.10
    ? dialog: [* dialog_object_type],        ; Section 4.1.11
    ? analysis: [* analysis_object_type],    ; Section 4.1.12
    ? attachments: [* attachment_object_type], ; Section 4.1.13
    extension_parameters_type
  }

; Object and multi-parameter types
;_________________________________

; Redacted Object (Section 4.1.8.1)
; uuid SHOULD be provided.
; content_hash MUST be provided if url is provided.
redacted_object_type = {
    ? uuid: uuid_value_type,
    type: tstr,
    ? ( url: url_value_type,
        content_hash: content_hash_type ),
    extension_parameters_type
  }

; Amended Object (Section 4.1.9.1)
; uuid is optional only if an external reference is provided.
; content_hash MUST be provided if url is provided.
amended_object_type = {
    ? uuid: uuid_value_type,
    ? ( url: url_value_type,
        content_hash: content_hash_type ),
    extension_parameters_type
  }

; Party Object (Section 4.2)
; A Party Object with no parameters is permitted.
party_object_type = {
    ? tel: tstr,                             ; Section 4.2.1
    ? sip: tstr,                             ; Section 4.2.2
    ? stir: tstr,                            ; Section 4.2.3
    ? mailto: tstr,                          ; Section 4.2.4
    ? name: tstr,                            ; Section 4.2.5
    ? did: tstr,                             ; Section 4.2.6
    ? validation: tstr,                      ; Section 4.2.7
    ? gmlpos: tstr,                          ; Section 4.2.8
    ? civicaddress: civicaddress_type,       ; Section 4.2.9
    ; a free form unique identifier for the participant;
    ; not constrained to UUID syntax (Section 4.2.10)
    ? uuid: tstr,
    ; type SHOULD be "person", "bot" or "organization"
    ? type: tstr,                            ; Section 4.2.11
    ? org: tstr,                             ; Section 4.2.12
    ? dept: tstr,                            ; Section 4.2.13
    extension_parameters_type
  }

; Civicaddress Object (Section 4.2.9)
civicaddress_type = {
    ? country: tstr,
    ? a1: tstr,
    ? a2: tstr,
    ? a3: tstr,
    ? a4: tstr,
    ? a5: tstr,
    ? a6: tstr,
    ? prd: tstr,
    ? pod: tstr,
    ? sts: tstr,
    ? hno: tstr,
    ? hns: tstr,
    ? lmk: tstr,
    ? loc: tstr,
    ? flr: tstr,
    ? nam: tstr,
    ? pc: tstr,
    extension_parameters_type
  }

; Dialog Object (Section 4.3)
; A placeholder Dialog Object contains only the type parameter and,
; for the "incomplete" type, the required disposition parameter.
; A placeholder Dialog Object MUST be of type "recording" if the
; call was set up, or of type "incomplete" if it was not.
dialog_object_type = {
    ( dialog_recording_type //
      dialog_text_type //
      dialog_recording_set_type //
      dialog_transfer_type //
      dialog_incomplete_type ),
    extension_parameters_type
  }

; Parameters common to all Dialog Object types
dialog_common_type = (
    ; start SHOULD be present; MAY be omitted if not known
    ? start: date_type,                      ; Section 4.3.2
    ? duration: duration_type,               ; Section 4.3.3
    ? application: tstr                      ; Section 4.3.15
  )

; Parameters prohibited in "transfer" type Dialog Objects
dialog_session_group_type = (
    ? session_id: session_id_parameter_type, ; Section 4.3.12
    ? party_history: [* party_history_object_type] ; Section 4.3.13
  )

dialog_recording_type = (
    type: "recording",                       ; Section 4.3.1
    dialog_common_type,
    dialog_session_group_type,
    ; parties SHOULD be present
    ? parties: dialog_parties_type,          ; Section 4.3.4
    ? originator: party_index_type,          ; Section 4.3.5
    ; recording_set SHOULD be present when part of a recording-set
    ? recording_set: dialog_index_type,      ; Section 4.3.7
    ; mediatype MUST be present for inline content; not required
    ; when Dialog Content is absent
    ? mediatype: media_type_value_type,      ; Section 4.3.8
    ? filename: tstr,                        ; Section 4.3.9
    ? message_id: tstr,                      ; Section 4.3.16
    ; Dialog Content (Section 4.3.10) SHOULD be present;
    ; body or url MAY be absent if redacted
    ? file_content_type
  )

dialog_text_type = (
    type: "text",                            ; Section 4.3.1
    dialog_common_type,
    dialog_session_group_type,
    ; parties SHOULD be present
    ? parties: dialog_parties_type,          ; Section 4.3.4
    ? originator: party_index_type,          ; Section 4.3.5
    ; mediatype MUST be present for inline content; not required
    ; when Dialog Content is absent
    ? mediatype: media_type_value_type,      ; Section 4.3.8
    ? filename: tstr,                        ; Section 4.3.9
    ? message_id: tstr,                      ; Section 4.3.16
    ; Dialog Content (Section 4.3.10) SHOULD be present;
    ; body or url MAY be absent if redacted
    ? file_content_type
  )

dialog_recording_set_type = (
    type: "recording-set",                   ; Section 4.3.1
    dialog_common_type,
    dialog_session_group_type,
    ; parties SHOULD be present
    ? parties: dialog_parties_type,          ; Section 4.3.4
    ? originator: party_index_type,          ; Section 4.3.5
    recordings: [* dialog_index_type]        ; Section 4.3.6
  )

; The transfer parameters are defined for the "transfer" type
; Dialog Object and MUST NOT be present in other dialog types.
; Each SHOULD be present unless noted as optional (Section 4.3.14).
; The duration parameter has no defined meaning for the "transfer"
; type; it MAY be present but its semantics are undefined.
dialog_transfer_type = (
    type: "transfer",                        ; Section 4.3.1
    dialog_common_type,
    ? transferee: party_index_type,
    ? transferor: party_index_type,
    ; optional if the transfer is abandoned before the target
    ; was identified
    ? transfer_target: party_index_type,
    ; references a "recording", "recording-set" or "text" type
    ; Dialog Object; an original call cannot be "incomplete"
    ? original: dialog_index_type,
    ; consultation and target_dialog reference a "recording",
    ; "recording-set", "text" or "incomplete" type Dialog Object
    ? consultation: dialog_index_type,
    ? target_dialog: dialog_index_type
  )

dialog_incomplete_type = (
    type: "incomplete",                      ; Section 4.3.1
    dialog_common_type,
    dialog_session_group_type,
    ? parties: dialog_parties_type,          ; Section 4.3.4
    ? originator: party_index_type,          ; Section 4.3.5
    ; "failed" SHOULD be used when the reason is not known
    disposition: disposition_value_type      ; Section 4.3.11
  )

; Party_History Object (Section 4.3.13.1)
; button is required for keydown and keyup events.
party_history_object_type = {
    party: party_index_type,
    time: date_type,
    ( event: "join" / "drop" / "hold" / "unhold" /
             "mute" / "unmute" //
      ( event: "keydown" / "keyup",
        button: tstr ) ),
    extension_parameters_type
  }

; Attachment Object (Section 4.4)
attachment_object_type = {
    ? purpose: tstr,                         ; Section 4.4.1
    start: date_type,                        ; Section 4.4.2
    party: party_index_type,                 ; Section 4.4.3
    dialog: dialog_index_type,               ; Section 4.4.4
    ; mediatype MUST be present for inline content; not required
    ; when Attachment Content is absent
    ? mediatype: media_type_value_type,      ; Section 4.4.5
    ? filename: tstr,                        ; Section 4.4.6
    ; Attachment Content (Section 4.4.7) SHOULD be present;
    ; body or url MAY be absent if redacted
    ? file_content_type,
    extension_parameters_type
  }

; Analysis Object (Section 4.5)
analysis_object_type = {
    ; type SHOULD be one of: "report", "sentiment", "summary",
    ; "transcript", "translation", "tts"
    type: tstr,                              ; Section 4.5.1
    ; dialog is optional only if the analysis was not derived
    ; from any dialog
    ? dialog: dialog_index_or_list_type,     ; Section 4.5.2
    ; attachment is optional only if the analysis was not derived
    ; from any attachment
    ? attachment: attachment_index_or_list_type, ; Section 4.5.3
    ; mediatype SHOULD be present for inline content; when no
    ; media type is defined for the analysis data format, the
    ; vendor, product and schema parameters SHOULD identify the
    ; format instead
    ? mediatype: media_type_value_type,      ; Section 4.5.4
    ? filename: tstr,                        ; Section 4.5.5
    vendor: tstr,                            ; Section 4.5.6
    ? product: tstr,                         ; Section 4.5.7
    ? schema: tstr,                          ; Section 4.5.8
    ; Analysis Content (Section 4.5.9) SHOULD be present;
    ; body or url MAY be absent if redacted
    ? file_content_type,
    extension_parameters_type
  }

; Inline Files (Section 2.3) and
; Externally Referenced Files (Section 2.4)
;___________________________________________

file_content_type = ( inline_content_type // external_content_type )

; body is any JSON value when encoding is "json";
; otherwise body is a string (Sections 2.3.1 and 2.3.2).
inline_content_type = (
    ( encoding: "json",
      body: any ) //
    ( encoding: "none" / "base64url",
      body: tstr )
  )

external_content_type = (
    url: url_value_type,                     ; Section 2.4.1
    content_hash: content_hash_type          ; Section 2.4.2
  )

; SessionId (Section 2.2 and Section 4.3.12)
; The empty object is the placeholder for a party with no session id.
session_id_object_type = {
    ? "local": uuid_value_type,
    ? "remote": uuid_value_type
  }

session_id_parameter_type =
    session_id_object_type /
    [* ( session_id_object_type / [* session_id_object_type] )]

; Basic types and single parameter types
;_______________________________________

; RFC3339 date string (Section 2.2)
date_type = tstr

; String token of the form: hash algorithm, "-", Base64Url encoded
; digest, e.g. "sha512-..." (Section 2.2)
content_hash_value_type = tstr

content_hash_type =
    content_hash_value_type / [* content_hash_value_type]

; Duration in seconds; MUST be non-negative (Section 4.3.3)
duration_type = uint / float

; "no-answer" etc. (Section 4.3.11)
disposition_value_type = "no-answer" / "congestion" / "failed" /
    "busy" / "hung-up" / "voicemail-no-message"

; Media type of the form: type "/" subtype (Section 2.2)
media_type_value_type = tstr

party_index_type = uint

dialog_index_type = uint

dialog_index_or_list_type = dialog_index_type / [* dialog_index_type]

attachment_index_type = uint

attachment_index_or_list_type =
    attachment_index_type / [* attachment_index_type]

; Index or indices of parties; the nested array form is used for
; multi-channel recordings with one entry per channel; null is the
; placeholder for an unused channel (Section 4.3.4).
dialog_parties_type = party_index_type /
    [* ( party_index_type / [* party_index_type] / null )]

; Extension parameters MAY appear in any object (Section 2.5)
extension_parameters_type = (
    * tstr => any
  )

uuid_value_type = tstr

; HTTPS URL (Section 2.4.1)
url_value_type = tstr

; Signed Form of vCon Object (Section 5.2)
;_________________________________________

signed_vcon_type = {
    payload: base64url_value_type,
    signatures: [* signature_object_type],
    extension_parameters_type
  }

; Signature Object (Section 5.2.1)
signature_object_type = {
    header: signed_header_object_type,
    protected: base64url_value_type,
    signature: base64url_value_type,
    extension_parameters_type
  }

; Header Object (Section 5.2.2)
; MUST include alg and either x5c or x5u.
signed_header_object_type = {
    alg: tstr,                               ; SHOULD be "RS256"
    ( x5c: [* tstr] //
      x5u: url_value_type ),
    ? uuid: uuid_value_type,                 ; SHOULD be provided
    extension_parameters_type
  }

; Encrypted Form of vCon Object (Section 5.3)
;____________________________________________

encrypted_vcon_type = {
    unprotected: unprotected_object_type,
    recipients: [* recipient_object_type],
    iv: base64url_value_type,
    ciphertext: base64url_value_type,
    tag: base64url_value_type,
    extension_parameters_type
  }

; Unprotected Object (Section 5.3.1)
unprotected_object_type = {
    ; cty SHOULD be "application/vcon" or "application/vcon+gzip"
    cty: tstr,
    ; enc SHOULD be "A256CBC-HS512"
    enc: tstr,
    ? uuid: uuid_value_type,                 ; SHOULD be provided
    extension_parameters_type
  }

; Recipient Object (Section 5.3.2)
recipient_object_type = {
    header: recipient_header_object_type,
    encrypted_key: base64url_value_type,
    extension_parameters_type
  }

; Header Object (Section 5.3.3)
recipient_header_object_type = {
    alg: tstr,                               ; SHOULD be "RSA-OAEP"
    extension_parameters_type
  }

; Base64Url encoded string
base64url_value_type = tstr

Acknowledgments

Author's Address

Daniel G Petrie
SIPez LLC