CGRCAPI Specification

Introduction

...

An CGRCAPI definition can then be used by documentation generation tools to display the API, code generation tools to generate servers and clients in various programming languages, testing tools, and many other use cases.

Please visit the Continuum GRC Knowledgebase for more detailed examples of existing integration guidance.

Definitions

CGRCAPI Document
A document (or set of documents) that defines or describes an API. An CGRCAPI definition uses and conforms to the CGRCAPI Specification.

Path Templating
Path templating refers to the usage of template expressions, delimited by curly braces ({}), to mark a section of a URL path as replaceable using path parameters.

Each template expression in the path MUST correspond to a path parameter that is included in the Path Item itself and/or in each of the Path Item's Operations.

Media Types
Media type definitions are spread across several resources. The media type definitions SHOULD be in compliance with RFC6838.

...

text/plain; charset=utf-8
application/json
application/vnd.github+json
application/vnd.github.v3+json
application/vnd.github.v3.raw+json
application/vnd.github.v3.text+json
application/vnd.github.v3.html+json
application/vnd.github.v3.full+json
application/vnd.github.v3.diff
application/vnd.github.v3.patch

HTTP Status Codes
The HTTP Status Codes are used to indicate the status of the executed operation. The available status codes are defined by RFC7231 and registered status codes are listed in the IANA Status Code Registry.

Specification
Versions
The CGRCAPI Specification is versioned using Semantic Versioning 2.0.0 (semver) and follows the semver specification.

The major.minor portion of the semver (for example 3.0) SHALL designate the CS feature set. Typically, .patch versions address errors in this document, not the feature set. Tooling which supports CS 3.0 SHOULD be compatible with all CS 3.0.* versions. The patch version SHOULD NOT be considered by tooling, making no distinction between 3.0.0 and 3.0.1 for example.

Each new minor version of the CGRCAPI Specification SHALL allow any CGRCAPI document that is valid against any previous minor version of the Specification, within the same major version, to be updated to the new Specification version with equivalent semantics. Such an update MUST only require changing the CGRCAPI property to the new minor version.

For example, a valid CGRCAPI 3.0.2 document, upon changing its CGRCAPI property to 3.1.0, SHALL be a valid CGRCAPI 3.1.0 document, semantically equivalent to the original CGRCAPI 3.0.2 document. New minor versions of the CGRCAPI Specification MUST be written to ensure this form of backward compatibility.

An CGRCAPI document compatible with CS 3.. contains a required CGRCAPI field which designates the semantic version of the CS that it uses. (CS 2.0 documents contain a top-level version field named swagger and value "2.0".)

Format
An CGRCAPI document that conforms to the CGRCAPI Specification is itself a JSON object, which may be represented either in JSON or YAML format.

...

Format

An CGRCAPI document that conforms to the CGRCAPI Specification is itself a JSON object, which may be represented either in JSON or YAML format.

For example, if a field has an array value, the JSON array representation will be used:

{
"field": [ 1, 2, 3 ]
}

All field names in the specification are case sensitive. This includes all fields that are used as keys in a map, except where explicitly noted that keys are case case insensitive.

The schema exposes two types of fields: Fixed fields, which have a declared name, and Patterned fields, which declare a regex pattern for the field name.

...

In order to preserve the ability to round-trip between YAML and JSON formats, YAML version 1.2 is RECOMMENDED along with some additional constraints:

· Tags MUST be limited to those allowed by the JSON Schema ruleset.

· Keys used in YAML maps MUST be limited to a scalar string, as defined by the YAML Failsafe schema ruleset.

Note: While APIs may be defined by CGRCAPI documents in either YAML or JSON format, the API request and response bodies and other content are not required to be JSON or YAML.

Document Structure

An CGRCAPI document MAY be made up of a single document or be divided into multiple, connected parts at the discretion of the user. In the latter case, $ref fields MUST be used in the specification to reference those parts as follows from the JSON Schema definitions.

It is RECOMMENDED that the root CGRCAPI document be named: CGRCAPI.json or CGRCAPI.yaml.

Data Types

Primitive data types in the CS are based on the types supported by the JSON Schema Specification Wright Draft 00. Note that integer as a type is also supported and is defined as a JSON number without a fraction or exponent part. null is not supported as a type (see nullable for an alternative solution). Models are defined using the Schema Object, which is an extended subset of JSON Schema Specification Wright Draft 00.

...

The formats defined by the CS are:

type format Comments
integer int32 signed 32 bits
integer int64 signed 64 bits (a.k.a long)
number float
number double
string
string byte base64 encoded characters
string binary any sequence of octets
boolean
string date As defined by full-date - RFC3339
string date-time As defined by date-time - RFC3339
string password A hint to UIs to obscure input.

Rich Text Formatting

Throughout the specification description fields are noted as supporting CommonMark markdown formatting. Where CGRCAPI tooling renders rich text it MUST support, at a minimum, markdown syntax as described by CommonMark 0.27. Tooling MAY choose to ignore some CommonMark features to address security concerns.

Relative References in URLs

Unless specified otherwise, all properties that are URLs MAY be relative references as defined by RFC3986. Relative references are resolved using the URLs defined in the Server Object as a Base URI.

Relative references used in $ref are processed as per JSON Reference, using the URL of the current document as the base URI. See also the Reference Object.

Schema

In the following description, if a field is not explicitly REQUIRED or described with a MUST or SHALL, it can be considered OPTIONAL.

CGRCAPI Object

This is the root document object of the CGRCAPI document.

Fixed Fields

Field Name Type Description
CGRCAPI string REQUIRED. This string MUST be the semantic version number of the CGRCAPI Specification version that the CGRCAPI document uses. The CGRCAPI field SHOULD be used by tooling specifications and clients to interpret the CGRCAPI document. This is not related to the API info.version string.
info Info Object REQUIRED. Provides metadata about the API. The metadata MAY be used by tooling as required.
servers [Server Object] An array of Server Objects, which provide connectivity information to a target server. If the servers property is not provided, or is an empty array, the default value would be a Server Object with a url value of /.
paths Paths Object REQUIRED. The available paths and operations for the API.
components Components Object An element to hold various schemas for the specification.
security [Security Requirement Object] A declaration of which security mechanisms can be used across the API. The list of values includes alternative security requirement objects that can be used. Only one of the security requirement objects need to be satisfied to authorize a request. Individual operations can override this definition. To make security optional, an empty security requirement ({}) can be included in the array.
tags [Tag Object] A list of tags used by the specification with additional metadata. The order of the tags can be used to reflect on their order by the parsing tools. Not all tags that are used by the Operation Object must be declared. The tags that are not declared MAY be organized randomly or based on the tools' logic. Each tag name in the list MUST be unique.
externalDocs External Documentation Object Additional external documentation.

This object MAY be extended with Specification Extensions.

Info Object

The object provides metadata about the API. The metadata MAY be used by the clients if needed, and MAY be presented in editing or documentation generation tools for convenience.

Fixed Fields

Field Name Type Description
title string REQUIRED. The title of the API.
description string A short description of the API. CommonMark syntax MAY be used for rich text representation.
termsOfService string A URL to the Terms of Service for the API. MUST be in the format of a URL.
contact Contact Object The contact information for the exposed API.
license License Object The license information for the exposed API.
version string REQUIRED. The version of the CGRCAPI document (which is distinct from the CGRCAPI Specification version or the API implementation version).
This object MAY be extended with Specification Extensions.Info Object Example
{
"title": "Sample Pet Store App",
"description": "This is a sample server for a pet store.",
"termsOfService": "http://example.com/terms/",
"contact": {
"name": "API Support",
"url": "http://www.example.com/support",
"email": "support@example.com"
},
"license": {
"name": "Apache 2.0",
"url": "https://www.apache.org/licenses/LICENSE-2.0.html"
},
"version": "1.0.1"
}
title: Sample Pet Store App
description: API.
license License Object The license information for the exposed API.
version string REQUIRED. The version of the CGRCAPI document (which is distinct from the CGRCAPI Specification version or the API implementation version).

This object MAY be extended with Specification Extensions.

Info Object Example

{
"title": "Sample Pet Store App",
"description": "This is a sample server for a pet store.",
"termsOfService": http"https://exampleauditmachine.com/terms/",
"contact": {
name: API Support
url: http://www.example.com/support
email: support@example.com
license:
name: Apache 2.0
url: "name": "API Support",
"url": "https://wwwauditmachine.apache.org/licenses/LICENSE-2.0.html
version: 1.0.1com/support",
"email": "support@auditmachine.com"
},

Contact Object

Contact information for the exposed API.

Fixed Fields

Field Name Type Description
name string The identifying name of the contact person/organization.
url string The URL pointing to the contact information. MUST be in the format of a URL.
email string The email address of the contact person/organization. MUST be in the format of an email address.

This object MAY be extended with Specification Extensions.

Contact Object Example

{
"name": "API Support",
"url": "httphttps://wwwauditmachine.example.com/support",
"email": "support@examplesupport@auditmachine.com"
}
name: API Support
url: httphttps://www.exampleauditmachine.com/support
email: support@examplesupport@auditmachine.com

License Object

License information for the exposed API.

Fixed Fields
Field Name Type Description
name string REQUIRED. The license name used for the API.
url string A URL to the license used for the API. MUST be in the format of a URL.
This object MAY be extended with Specification Extensions.License Object Example
{
"name": "Apache 2.0",
"url": "https://www.apache.org/licenses/LICENSE-2.0.html"
}
name: Apache 2.0
url: https://www.apache.org/licenses/LICENSE-2.0.html
Server Object
An object representing a Server
name string REQUIRED. The license name used for the API.
url string A URL to the license used for the API. MUST be in the format of a URL.
This object MAY be extended with Specification Extensions.

Fixed Fields

Field Name Type Description
url string REQUIRED. A URL to the target host. This URL supports Server Variables and MAY be relative, to indicate that the host location is relative to the location where the CGRCAPI document is being served. Variable substitutions will be made when a variable is named in {brackets}.
description string An optional string describing the host designated by the URL. CommonMark syntax MAY be used for rich text representation.
variables Map[string, Server Variable Object] A map between a variable name and its value. The value is used for substitution in the server's URL template.
This object MAY be extended with Specification Extensions.

Server Object Example
A single server would be described as:

{
"url": "https://development.gigantic-server.com/v1",
"description": "Development server"
}
url: https://development.gigantic-server.com/v1description: Development server

The following shows how multiple servers can be described, for example, at the CGRCAPI Object's servers:

{
"servers": [
{
"url": "https://development.gigantic-serverauditmachine.com/v1",
"description": "Development server"
},
{
"url": "https://staging.gigantic-serverauditmachine.com/v1",
"description": "Staging server"
},
{
"url": "https://api.gigantic-serverauditmachine.com/v1",
"description": "Production server"
}
]
}
servers:

· url: https://development.

...

auditmachine.com/v1
description: Development server

· url: https://staging.

...

auditmachine.com/v1
description: Staging server

· url: https://api.

...

auditmachine.com/v1
description: Production server
The following shows how variables can be used for a server configuration:

{
"servers": [
{
"url": "https://{username}.gigantic-serverauditmachine.com:{port}/{basePath}",
"description": "The production API server",
"variables": {
"username": {
"default": "demo",
"description": "this value is assigned by the service provider, in this example gigantic-serverauditmachine.com"
},
"port": {
"enum": [
"8443",
"443"
],
"default": "8443"
},
"basePath": {
"default": "v2"
}
}
}
]
}
servers:

· url: https://{username}.

...

auditmachine.com:{port}/{basePath}
description: The production API server
variables:
username:
# note! no enum here means it is an open value
default: demo
description: this value is assigned by the service provider, in this example

...

auditmachine.com
port:
enum:

- '8443'-
'443'

default: '8443'
basePath:
# open meaning there is the opportunity to use special base paths as assigned by the provider, default is v2
default: v2
Server Variable Object
An object representing a Server Variable for server URL template substitution.

Fixed Fields
Field Name Type Description
enum [string] An enumeration of string values to be used if the substitution options are from a limited set. The array SHOULD NOT be empty.
default string REQUIRED. The default value to use for substitution, which SHALL be sent if an alternate value is not supplied. Note this behavior is different than the Schema Object's treatment of default values, because in those cases parameter values are optional. If the enum is defined, the value SHOULD exist in the enum's values.
description string An optional description for the server variable. CommonMark syntax MAY be used for rich text representation.
This object MAY be extended with Specification Extensions.

Components Object
Holds a set of reusable objects for different aspects of the CS. All objects defined within the components object will have no effect on the API unless they are explicitly referenced from properties outside the components object.

Fixed Fields
Field Name Type Description
schemas Map[string, Schema Object | Reference Object] An object to hold reusable Schema Objects.
responses Map[string, Response Object | Reference Object] An object to hold reusable Response Objects.
parameters Map[string, Parameter Object | Reference Object] An object to hold reusable Parameter Objects.
examples Map[string, Example Object | Reference Object] An object to hold reusable Example Objects.
requestBodies Map[string, Request Body Object | Reference Object] An object to hold reusable Request Body Objects.
headers Map[string, Header Object | Reference Object] An object to hold reusable Header Objects.
securitySchemes Map[string, Security Scheme Object | Reference Object] An object to hold reusable Security Scheme Objects.
links Map[string, Link Object | Reference Object] An object to hold reusable Link Objects.
callbacks Map[string, Callback Object | Reference Object] An object to hold reusable Callback Objects.
This object MAY be extended with Specification Extensions.

All the fixed fields declared above are objects that MUST use keys that match the regular expression: ^[a-zA-Z0-9.-_]+$.

Field Name Examples:

User
User_1
User_Name
user-name
my.org.User
Components Object Example
"components": {
"schemas": {
"GeneralError": {
"type": "object",
"properties": {
"code": {
"type": "integer",
"format": "int32"
},
"message": {
"type": "string"
}
}
},
"Category": {
"type": "object",
"properties": {
"id": {
"type": "integer",
"format": "int64"
},
"name": {
"type": "string"
}
}
},
"Tag": {
"type": "object",
"properties": {
"id": {
"type": "integer",
"format": "int64"
},
"name": {
"type": "string"
}
}
}
},
"parameters": {
"skipParam": {
"name": "skip",
"in": "query",
"description": "number of items to skip",
"required": true,
"schema": {
"type": "integer",
"format": "int32"
}
},
"limitParam": {
"name": "limit",
"in": "query",
"description": "max records to return",
"required": true,
"schema" : {
"type": "integer",
"format": "int32"
}
}
},
"responses": {
"NotFound": {
"description": "Entity not found."
},
"IllegalInput": {
"description": "Illegal input for operation."
},
"GeneralError": {
"description": "General Error",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/GeneralError"
}
}
}
}
},
"securitySchemes": {
"api_key": {
"type": "apiKey",
"name": "api_key",
"in": "header"
},
"petstore_auth": {
"type": "oauth2",
"flows": {
"implicit": {
"authorizationUrl": "http://exampleauditmachine.orgcom/api/oauth/dialog",
"scopes": {
"write:pets": "modify pets in your account",
"read:pets": "read your pets"
}
}
}
}
}
}
components:
schemas:
GeneralError:
type: object
properties:
code:
type: integer
format: int32
message:
type: string
Category:
type: object
properties:
id:
type: integer
format: int64
name:
type: string
Tag:
type: object
properties:
id:
type: integer
format: int64
name:
type: string
parameters:
skipParam:
name: skip
in: query
description: number of items to skip
required: true
schema:
type: integer
format: int32
limitParam:
name: limit
in: query
description: max records to return
required: true
schema:
type: integer
format: int32
responses:
NotFound:
description: Entity not found.
IllegalInput:
description: Illegal input for operation.
GeneralError:
description: General Error
content:
application/json:
schema:
$ref: '#/components/schemas/GeneralError'
securitySchemes:
api_key:
type: apiKey
name: api_key
in: header
petstore_auth:
type: oauth2
flows:
implicit:
authorizationUrl: http://exampleauditmachine.orgcom/api/oauth/dialog
scopes:
write:pets: modify pets in your account
read:pets: read your pets
Paths Object
Holds the relative paths to the individual endpoints and their operations. The path is appended to the URL from the Server Object in order to construct the full URL. The Paths MAY be empty, due to ACL constraints.

Patterned Fields
Field Pattern Type Description
/{path} Path Item Object A relative path to an individual endpoint. The field name MUST begin with a forward slash (/). The path is appended (no relative URL resolution) to the expanded URL from the Server Object's url field in order to construct the full URL. Path templating is allowed. When matching URLs, concrete (non-templated) paths would be matched before their templated counterparts. Templated paths with the same hierarchy but different templated names MUST NOT exist as they are identical. In case of ambiguous matching, it's up to the tooling to decide which one to use.
This object MAY be extended with Specification Extensions.

...

/pets/{petId}
/pets/{name}
The following may lead to ambiguous resolution:

/{entity}/me
/books/{id}
Paths Object Example
{
"/pets": {
"get": {
"description": "Returns all pets from the system that the user has access to",
"responses": {
"200": {
"description": "A list of pets.",
"content": {
"application/json": {
"schema": {
"type": "array",
"items": {
"$ref": "#/components/schemas/pet"
}
}
}
}
}
}
}
}
}
/pets:
get:
description: Returns all pets from the system that the user has access to
responses:
'200':
description: A list of pets.
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/pet'
Path Item Object
Describes the operations available on a single path. A Path Item MAY be empty, due to ACL constraints. The path itself is still exposed to the documentation viewer but they will not know which operations and parameters are available.

Fixed Fields
Field Name Type Description
$ref string Allows for an external definition of this path item. The referenced structure MUST be in the format of a Path Item Object. In case a Path Item Object field appears both in the defined object and the referenced object, the behavior is undefined.
summary string An optional, string summary, intended to apply to all operations in this path.
description string An optional, string description, intended to apply to all operations in this path. CommonMark syntax MAY be used for rich text representation.
get Operation Object A definition of a GET operation on this path.
put Operation Object A definition of a PUT operation on this path.
post Operation Object A definition of a POST operation on this path.
delete Operation Object A definition of a DELETE operation on this path.
options Operation Object A definition of a OPTIONS operation on this path.
head Operation Object A definition of a HEAD operation on this path.
patch Operation Object A definition of a PATCH operation on this path.
trace Operation Object A definition of a TRACE operation on this path.
servers [Server Object] An alternative server array to service all operations in this path.
parameters [Parameter Object | Reference Object] A list of parameters that are applicable for all the operations described under this path. These parameters can be overridden at the operation level, but cannot be removed there. The list MUST NOT include duplicated parameters. A unique parameter is defined by a combination of a name and location. The list can use the Reference Object to link to parameters that are defined at the CGRCAPI Object's components/parameters.
This object MAY be extended with Specification Extensions.

Path Item Object Example
{
"get": {
"description": "Returns pets based on ID",
"summary": "Find pets by ID",
"operationId": "getPetsById",
"responses": {
"200": {
"description": "pet response",
"content": {
"/": {
"schema": {
"type": "array",
"items": {
"$ref": "#/components/schemas/Pet"
}
}
}
}
},
"default": {
"description": "error payload",
"content": {
"text/html": {
"schema": {
"$ref": "#/components/schemas/ErrorModel"
}
}
}
}
}
},
"parameters": [
{
"name": "id",
"in": "path",
"description": "ID of pet to use",
"required": true,
"schema": {
"type": "array",
"items": {
"type": "string"
}
},
"style": "simple"
}
]
}
get:
description: Returns pets based on ID
summary: Find pets by ID
operationId: getPetsById
responses:
'200':
description: pet response
content:
'/' :
schema:
type: array
items:
$ref: '#/components/schemas/Pet'
default:
description: error payload
content:
'text/html':
schema:
$ref: '#/components/schemas/ErrorModel'
parameters:

· name: id
in: path
description: ID of pet to use
required: true
schema:
type: array
items:
type: string
style: simple
Operation Object
Describes a single API operation on a path.

Fixed Fields
Field Name Type Description
tags [string] A list of tags for API documentation control. Tags can be used for logical grouping of operations by resources or any other qualifier.
summary string A short summary of what the operation does.
description string A verbose explanation of the operation behavior. CommonMark syntax MAY be used for rich text representation.
externalDocs External Documentation Object Additional external documentation for this operation.
operationId string Unique string used to identify the operation. The id MUST be unique among all operations described in the API. The operationId value is case-sensitive. Tools and libraries MAY use the operationId to uniquely identify an operation, therefore, it is RECOMMENDED to follow common programming naming conventions.
parameters [Parameter Object | Reference Object] A list of parameters that are applicable for this operation. If a parameter is already defined at the Path Item, the new definition will override it but can never remove it. The list MUST NOT include duplicated parameters. A unique parameter is defined by a combination of a name and location. The list can use the Reference Object to link to parameters that are defined at the CGRCAPI Object's components/parameters.
requestBody Request Body Object | Reference Object The request body applicable for this operation. The requestBody is only supported in HTTP methods where the HTTP 1.1 specification RFC7231 has explicitly defined semantics for request bodies. In other cases where the HTTP spec is vague, requestBody SHALL be ignored by consumers.

responses Responses Object REQUIRED. The list of possible responses as they are returned from executing this operation.

callbacks Map[string, Callback Object | Reference Object] A map of possible out-of band callbacks related to the parent operation. The key is a unique identifier for the Callback Object. Each value in the map is a Callback Object that describes a request that may be initiated by the API provider and the expected responses.
deprecated boolean Declares this operation to be deprecated. Consumers SHOULD refrain from usage of the declared operation. Default value is false.
security [Security Requirement Object] A declaration of which security mechanisms can be used for this operation. The list of values includes alternative security requirement objects that can be used. Only one of the security requirement objects need to be satisfied to authorize a request. To make security optional, an empty security requirement ({}) can be included in the array. This definition overrides any declared top-level security. To remove a top-level security declaration, an empty array can be used.
servers [Server Object] An alternative server array to service this operation. If an alternative server object is specified at the Path Item Object or Root level, it will be overridden by this value.
This object MAY be extended with Specification Extensions.

Operation Object Example
{
"tags": [
"pet"
],
"summary": "Updates a pet in the store with form data",
"operationId": "updatePetWithForm",
"parameters": [
{
"name": "petId",
"in": "path",
"description": "ID of pet that needs to be updated",
"required": true,
"schema": {
"type": "string"
}
}
],
"requestBody": {
"content": {
"application/x-www-form-urlencoded": {
"schema": {
"type": "object",
"properties": {
"name": {
"description": "Updated name of the pet",
"type": "string"
},
"status": {
"description": "Updated status of the pet",
"type": "string"
}
},
"required": ["status"]
}
}
}
},
"responses": {
"200": {
"description": "Pet updated.",
"content": {
"application/json": {},
"application/xml": {}
}
},
"405": {
"description": "Method Not Allowed",
"content": {
"application/json": {},
"application/xml": {}
}
}
},
"security": [
{
"petstore_auth": [
"write:pets",
"read:pets"
]
}
]
}
tags:

· pet
summary: Updates a pet in the store with form data
operationId: updatePetWithForm
parameters:

· name: petId
in: path
description: ID of pet that needs to be updated
required: true
schema:
type: string
requestBody:
content:
'application/x-www-form-urlencoded':
schema:
properties:
name:
description: Updated name of the pet
type: string
status:
description: Updated status of the pet
type: string
required:

- status

responses:
'200':
description: Pet updated.
content:
'application/json': {}
'application/xml': {}
'405':
description: Method Not Allowed
content:
'application/json': {}
'application/xml': {}
security:

· petstore_auth:

o write:pets

o read:pets
External Documentation Object
Allows referencing an external resource for extended documentation.

Fixed Fields
Field Name Type Description
description string A short description of the target documentation. CommonMark syntax MAY be used for rich text representation.
url string REQUIRED. The URL for the target documentation. Value MUST be in the format of a URL.
This object MAY be extended with Specification Extensions.

External Documentation Object Example
{
"description": "Find more info here",
"url": "https://exampleauditmachine.com"
}
description: Find more info here
url: https://exampleauditmachine.com
Parameter Object
Describes a single operation parameter.

A unique parameter is defined by a combination of a name and location.

Parameter Locations
There are four possible parameter locations specified by the in field:

path - Used together with Path Templating, where the parameter value is actually part of the operation's URL. This does not include the host or base path of the API. For example, in /items/{itemId}, the path parameter is itemId.
query - Parameters that are appended to the URL. For example, in /items?id=###, the query parameter is id.
header - Custom headers that are expected as part of the request. Note that RFC7230 states header names are case insensitive.
cookie - Used to pass a specific cookie value to the API.

Fixed Fields
Field Name Type Description
name string REQUIRED. The name of the parameter. Parameter names are case sensitive.
If in is "path", the name field MUST correspond to a template expression occurring within the path field in the Paths Object. See Path Templating for further information.
If in is "header" and the name field is "Accept", "Content-Type" or "Authorization", the parameter definition SHALL be ignored.
For all other cases, the name corresponds to the parameter name used by the in property.
in string REQUIRED. The location of the parameter. Possible values are "query", "header", "path" or "cookie".
description string A brief description of the parameter. This could contain examples of use. CommonMark syntax MAY be used for rich text representation.
required boolean Determines whether this parameter is mandatory. If the parameter location is "path", this property is REQUIRED and its value MUST be true. Otherwise, the property MAY be included and its default value is false.
deprecated boolean Specifies that a parameter is deprecated and SHOULD be transitioned out of usage. Default value is false.
allowEmptyValue boolean Sets the ability to pass empty-valued parameters. This is valid only for query parameters and allows sending a parameter with an empty value. Default value is false. If style is used, and if behavior is n/a (cannot be serialized), the value of allowEmptyValue SHALL be ignored. Use of this property is NOT RECOMMENDED, as it is likely to be removed in a later revision.
The rules for serialization of the parameter are specified in one of two ways. For simpler scenarios, a schema and style can describe the structure and syntax of the parameter.

Field Name Type Description
style string Describes how the parameter value will be serialized depending on the type of the parameter value. Default values (based on value of in): for query - form; for path - simple; for header - simple; for cookie - form.
explode boolean When this is true, parameter values of type array or object generate separate parameters for each value of the array or key-value pair of the map. For other types of parameters this property has no effect. When style is form, the default value is true. For all other styles, the default value is false.
allowReserved boolean Determines whether the parameter value SHOULD allow reserved characters, as defined by RFC3986 :/?#[]@!$&'()*+,;= to be included without percent-encoding. This property only applies to parameters with an in value of query. The default value is false.
schema Schema Object | Reference Object The schema defining the type used for the parameter.
example Any Example of the parameter's potential value. The example SHOULD match the specified schema and encoding properties if present. The example field is mutually exclusive of the examples field. Furthermore, if referencing a schema that contains an example, the example value SHALL override the example provided by the schema. To represent examples of media types that cannot naturally be represented in JSON or YAML, a string value can contain the example with escaping where necessary.
examples Map[ string, Example Object | Reference Object] Examples of the parameter's potential value. Each example SHOULD contain a value in the correct format as specified in the parameter encoding. The examples field is mutually exclusive of the example field. Furthermore, if referencing a schema that contains an example, the examples value SHALL override the example provided by the schema.
For more complex scenarios, the content property can define the media type and schema of the parameter. A parameter MUST contain either a schema property, or a content property, but not both. When example or examples are provided in conjunction with the schema object, the example MUST follow the prescribed serialization strategy for the parameter.

Field Name Type Description
content Map[string, Media Type Object] A map containing the representations for the parameter. The key is the media type and the value describes it. The map MUST only contain one entry.
Style Values
In order to support common ways of serializing simple parameters, a set of style values are defined.

style type in Comments
matrix primitive, array, object path Path-style parameters defined by RFC6570
label primitive, array, object path Label style parameters defined by RFC6570
form primitive, array, object query, cookie Form style parameters defined by RFC6570. This option replaces collectionFormat with a csv (when explode is false) or multi (when explode is true) value from CGRCAPI 9.9.8.
simple array path, header Simple style parameters defined by RFC6570. This option replaces collectionFormat with a csv value from CGRCAPI 9.9.8.
spaceDelimited array query Space separated array values. This option replaces collectionFormat equal to ssv from CGRCAPI 9.9.8.
pipeDelimited array query Pipe separated array values. This option replaces collectionFormat equal to pipes from CGRCAPI 9.9.8.
deepObject object query Provides a simple way of rendering nested objects using form parameters.
Style Examples
Assume a parameter named color has one of the following values:

...

style explode empty string array object
matrix false ;color ;color=blue ;color=blue,black,brown ;color=R,100,G,200,B,150
matrix true ;color ;color=blue ;color=blue;color=black;color=brown ;R=100;G=200;B=150
label false . .blue .blue.black.brown .R.100.G.200.B.150
label true . .blue .blue.black.brown .R=100.G=200.B=150
form false color= color=blue color=blue,black,brown color=R,100,G,200,B,150
form true color= color=blue color=blue&color=black&color=brown R=100&G=200&B=150
simple false n/a blue blue,black,brown R,100,G,200,B,150
simple true n/a blue blue,black,brown R=100,G=200,B=150
spaceDelimited false n/a n/a blue%20black%20brown R%20100%20G%20200%20B%20150
pipeDelimited false n/a n/a blue|black|brown R|100|G|200|B|150
deepObject true n/a n/a n/a color[R]=100&color[G]=200&color[B]=150
This object MAY be extended with Specification Extensions.

Parameter Object Examples
A header parameter with an array of 64 bit integer numbers:

...

{
"in": "query",
"name": "coordinates",
"content": {
"application/json": {
"schema": {
"type": "object",
"required": [
"lat",
"long"
],
"properties": {
"lat": {
"type": "number"
},
"long": {
"type": "number"
}
}
}
}
}
}
in: query
name: coordinates
content:
application/json:
schema:
type: object
required:-

lat

...

long

properties:
lat:
type: number
long:
type: number
Request Body Object
Describes a single request body.

Fixed Fields
Field Name Type Description
description string A brief description of the request body. This could contain examples of use. CommonMark syntax MAY be used for rich text representation.
content Map[string, Media Type Object] REQUIRED. The content of the request body. The key is a media type or media type range and the value describes it. For requests that match multiple keys, only the most specific key is applicable. e.g. text/plain overrides text/*
required boolean Determines if the request body is required in the request. Defaults to false.
This object MAY be extended with Specification Extensions.

Request Body Examples
A request body with a referenced model definition.

...

{
"description": "user to add to the system",
"content": {
"text/plain": {
"schema": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
description: user to add to the system
required: true
content:
text/plain:
schema:
type: array
items:
type: string
Media Type Object
Each Media Type Object provides schema and examples for the media type identified by its key.

Fixed Fields
Field Name Type Description
schema Schema Object | Reference Object The schema defining the content of the request, response, or parameter.
example Any Example of the media type. The example object SHOULD be in the correct format as specified by the media type. The example field is mutually exclusive of the examples field. Furthermore, if referencing a schema which contains an example, the example value SHALL override the example provided by the schema.
examples Map[ string, Example Object | Reference Object] Examples of the media type. Each example object SHOULD match the media type and specified schema if present. The examples field is mutually exclusive of the example field. Furthermore, if referencing a schema which contains an example, the examples value SHALL override the example provided by the schema.
encoding Map[string, Encoding Object] A map between a property name and its encoding information. The key, being the property name, MUST exist in the schema as a property. The encoding object SHALL only apply to requestBody objects when the media type is multipart or application/x-www-form-urlencoded.
This object MAY be extended with Specification Extensions.

Media Type Examples
{
"application/json": {
"schema": {
"$ref": "#/components/schemas/Pet"
},
"examples": {
"cat" : {
"summary": "An example of a cat",
"value":
{
"name": "Fluffy",
"petType": "Cat",
"color": "White",
"gender": "male",
"breed": "Persian"
}
},
"dog": {
"summary": "An example of a dog with a cat's name",
"value" : {
"name": "Puma",
"petType": "Dog",
"color": "Black",
"gender": "Female",
"breed": "Mixed"
},
"frog": {
"$ref": "#/components/examples/frog-example"
}
}
}
}
}
application/json:
schema:
$ref: "#/components/schemas/Pet"
examples:
cat:
summary: An example of a cat
value:
name: Fluffy
petType: Cat
color: White
gender: male
breed: Persian
dog:
summary: An example of a dog with a cat's name
value:
name: Puma
petType: Dog
color: Black
gender: Female
breed: Mixed
frog:
$ref: "#/components/examples/frog-example"
Considerations for File Uploads
In contrast with the 2.0 specification, file input/output content in CGRCAPI is described with the same semantics as any other schema type. Specifically:

...

Encoding Object
A single encoding definition applied to a single schema property.

Fixed Fields
Field Name Type Description
contentType string The Content-Type for encoding a specific property. Default value depends on the property type: for string with format being binary – application/octet-stream; for other primitive types – text/plain; for object - application/json; for array – the default is defined based on the inner type. The value can be a specific media type (e.g. application/json), a wildcard media type (e.g. image/), or a comma-separated list of the two types.
headers Map[string, Header Object | Reference Object] A map allowing additional information to be provided as headers, for example Content-Disposition. Content-Type is described separately and SHALL be ignored in this section. This property SHALL be ignored if the request body media type is not a multipart.
style string Describes how a specific property value will be serialized depending on its type. See Parameter Object for details on the style property. The behavior follows the same values as query parameters, including default values. This property SHALL be ignored if the request body media type is not application/x-www-form-urlencoded.
explode boolean When this is true, property values of type array or object generate separate parameters for each value of the array, or key-value-pair of the map. For other types of properties this property has no effect. When style is form, the default value is true. For all other styles, the default value is false. This property SHALL be ignored if the request body media type is not application/x-www-form-urlencoded.
allowReserved boolean Determines whether the parameter value SHOULD allow reserved characters, as defined by RFC3986 :/?#[]@!$&'()+,;= to be included without percent-encoding. The default value is false. This property SHALL be ignored if the request body media type is not application/x-www-form-urlencoded.
This object MAY be extended with Specification Extensions.

Encoding Object Example
requestBody:
content:
multipart/mixed:
schema:
type: object
properties:
id:
# default is text/plain
type: string
format: uuid
address:
# default is application/json
type: object
properties: {}
historyMetadata:
# need to declare XML format!
description: metadata in XML format
type: object
properties: {}
profileImage:
# default is application/octet-stream, need to declare an image type only!
type: string
format: binary
encoding:
historyMetadata:
# require XML Content-Type in utf-8 encoding
contentType: application/xml; charset=utf-8
profileImage:
# only accept png/jpeg
contentType: image/png, image/jpeg
headers:
X-Rate-Limit-Limit:
description: The number of allowed requests in the current period
schema:
type: integer
Responses Object
A container for the expected responses of an operation. The container maps a HTTP response code to the expected response.

...

The Responses Object MUST contain at least one response code, and it SHOULD be the response for a successful operation call.

Fixed Fields
Field Name Type Description
default Response Object | Reference Object The documentation of responses other than the ones declared for specific HTTP response codes. Use this field to cover undeclared responses. A Reference Object can link to a response that the CGRCAPI Object's components/responses section defines.
Patterned Fields
Field Pattern Type Description
HTTP Status Code Response Object | Reference Object Any HTTP status code can be used as the property name, but only one property per code, to describe the expected response for that HTTP status code. A Reference Object can link to a response that is defined in the CGRCAPI Object's components/responses section. This field MUST be enclosed in quotation marks (for example, "200") for compatibility between JSON and YAML. To define a range of response codes, this field MAY contain the uppercase wildcard character X. For example, 2XX represents all response codes between [200-299]. Only the following range definitions are allowed: 1XX, 2XX, 3XX, 4XX, and 5XX. If a response is defined using an explicit code, the explicit code definition takes precedence over the range definition for that code.
This object MAY be extended with Specification Extensions.

Responses Object Example
A 200 response for a successful operation and a default response for others (implying an error):

{
"200": {
"description": "a pet to be returned",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Pet"
}
}
}
},
"default": {
"description": "Unexpected error",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/ErrorModel"
}
}
}
}
}
'200':
description: a pet to be returned
content:
application/json:
schema:
$ref: '#/components/schemas/Pet'
default:
description: Unexpected error
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorModel'
Response Object
Describes a single response from an API Operation, including design-time, static links to operations based on the response.

Fixed Fields
Field Name Type Description
description string REQUIRED. A short description of the response. CommonMark syntax MAY be used for rich text representation.
headers Map[string, Header Object | Reference Object] Maps a header name to its definition. RFC7230 states header names are case insensitive. If a response header is defined with the name "Content-Type", it SHALL be ignored.
content Map[string, Media Type Object] A map containing descriptions of potential response payloads. The key is a media type or media type range and the value describes it. For responses that match multiple keys, only the most specific key is applicable. e.g. text/plain overrides text/*
links Map[string, Link Object | Reference Object] A map of operations links that can be followed from the response. The key of the map is a short name for the link, following the naming constraints of the names for Component Objects.
This object MAY be extended with Specification Extensions.

Response Object Examples
Response of an array of a complex type:

...

POST /subscribe/myevent?queryUrl=http://clientdomain.auditmachine.com.com/stillrunning HTTP/1.1
Host: http://exampleauditmachine.orgcom
Content-Type: application/json
Content-Length: 187
{
"failedUrl" : "http://clientdomain.auditmachine.com.com/failed",
"successUrls" : [
"http://clientdomain.auditmachine.com.com/fast",
"http://clientdomain.auditmachine.com.com/medium",
"http://clientdomain.auditmachine.com.com/slow"
]
}
201 Created
Location: http://exampleauditmachine.orgcom/subscription/1
The following examples show how the various expressions evaluate, assuming the callback operation has a path parameter named eventType and a query parameter named queryUrl.

Expression Value
$url http://exampleauditmachine.orgcom/subscribe/myevent?queryUrl=http://clientdomain.auditmachine.com.com/stillrunning
$method POST
$request.path.eventType myevent
$request.query.queryUrl http://clientdomain.auditmachine.com.com/stillrunning
$request.header.content-Type application/json
$request.body#/failedUrl http://clientdomain.auditmachine.com.com/failed
$request.body#/successUrls/2 http://clientdomain.auditmachine.com.com/medium
$response.header.Location http://exampleauditmachine.orgcom/subscription/1
Callback Object Examples
The following example uses the user provided queryUrl query string parameter to define the callback URL. This is an example of how to use a callback object to describe a WebHook callback that goes with the subscription operation to enable registering for the WebHook.

...

transactionCallback:
'http://notificationServernotificationserver.com?transactionId={$request.body#/id}&email={$request.body#/email}':
post:
requestBody:
description: Callback payload
content:
'application/json':
schema:
$ref: '#/components/schemas/SomePayload'
responses:
'200':
description: callback successfully processed
Example Object
Fixed Fields
Field Name Type Description
summary string Short description for the example.
description string Long description for the example. CommonMark syntax MAY be used for rich text representation.
value Any Embedded literal example. The value field and externalValue field are mutually exclusive. To represent examples of media types that cannot naturally represented in JSON or YAML, use a string value to contain the example, escaping where necessary.
externalValue string A URL that points to the literal example. This provides the capability to reference examples that cannot easily be included in JSON or YAML documents. The value field and externalValue field are mutually exclusive.
This object MAY be extended with Specification Extensions.

...

requestBody:
content:
'application/json':
schema:
$ref: '#/components/schemas/Address'
examples:
foo:
summary: A foo example
value: {"foo": "bar"}
bar:
summary: A bar example
value: {"bar": "baz"}
'application/xml':
examples:
xmlExample:
summary: This is an example in XML
externalValue: 'http://exampleauditmachine.orgcom/examples/address-example.xml'
'text/plain':
examples:
textExample:
summary: This is a text example
externalValue: 'http://foo.bar/examples/address-example.txt'
In a parameter:

parameters:

· name: 'zipCode'
in: 'query'
schema:
type: 'string'
format: 'zip-code'
examples:
zip-example:
$ref: '#/components/examples/zip-example'
In a response:

responses:
'200':
description: your car appointment has been booked
content:
application/json:
schema:
$ref: '#/components/schemas/SuccessResponse'
examples:
confirmation-success:
$ref: '#/components/examples/confirmation-success'
Link Object
The Link object represents a possible design-time link for a response. The presence of a link does not guarantee the caller's ability to successfully invoke it, rather it provides a known relationship and traversal mechanism between responses and other operations.

...

For computing links, and providing instructions to execute them, a runtime expression is used for accessing values in an operation and using them as parameters while invoking the linked operation.

Fixed Fields
Field Name Type Description
operationRef string A relative or absolute URI reference to an CS operation. This field is mutually exclusive of the operationId field, and MUST point to an Operation Object. Relative operationRef values MAY be used to locate an existing Operation Object in the CGRCAPI definition.
operationId string The name of an existing, resolvable CS operation, as defined with a unique operationId. This field is mutually exclusive of the operationRef field.
parameters Map[string, Any | {expression}] A map representing parameters to pass to an operation as specified with operationId or identified via operationRef. The key is the parameter name to be used, whereas the value can be a constant or an expression to be evaluated and passed to the linked operation. The parameter name can be qualified using the parameter location [{in}.]{name} for operations that use the same parameter name in different locations (e.g. http://path.id ).
requestBody Any | {expression} A literal value or {expression} to use as a request body when calling the target operation.
description string A description of the link. CommonMark syntax MAY be used for rich text representation.
server Server Object A server object to be used by the target operation.
This object MAY be extended with Specification Extensions.

A linked operation MUST be identified using either an operationRef or operationId. In the case of an operationId, it MUST be unique and resolved in the scope of the CS document. Because of the potential for name clashes, the operationRef syntax is preferred for specifications with external references.

Examples
Computing a link from a request operation where the $request.path.id is used to pass a request parameter to the linked operation.

paths:
/users/{id}:
parameters:-

name: id

in: path
required: true
description: the user identifier, as userId
schema:
type: string
get:
responses:
'200':
description: the user being returned
content:
application/json:
schema:
type: object
properties:
uuid: # the unique user id
type: string
format: uuid
links:
address:
# the target link operationId
operationId: getUserAddress
parameters:
# get the id field from the request path parameter named id
userId: $request.path.id

the path item of the linked operation

/users/{userid}/address:
parameters:-

name: userid

in: path
required: true
description: the user identifier, as userId
schema:
type: string
# linked operation
get:
operationId: getUserAddress
responses:
'200':
description: the user's address
When a runtime expression fails to evaluate, no parameter value is passed to the target operation.

...

links:
UserRepositories:
# returns array of '#/components/schemas/repository'
operationRef: 'https://na2.gigantic-serverauditmachine.com/#/paths/~12.0~1repositories~1{username}/get'
parameters:
username: $response.body#/username
Note that in the use of operationRef, the escaped forward-slash is necessary when using JSON references.

Runtime Expressions
Runtime expressions allow defining values based on information that will only be available within the HTTP message in an actual API call. This mechanism is used by Link Objects and Callback Objects.

The runtime expression is defined by the following ABNF syntax

Code Block
expression = ( "$url" / "$method" / "$statusCode" / "$request." source / "$response." source )

Code Block
source = ( header-reference / query-reference / path-reference / body-reference )

Code Block
header-reference = "header." token

Code Block
query-reference = "query." name pathname

Code Block
path-reference = "path." name

Code Block
body-reference = "body" ["#" json-pointer ]

Code Block
json-pointer pointer = *( "/" reference-token )

Code Block
reference-token = *( unescaped / escaped ) unescaped

Code Block
unescaped = %x00-2E / %x30-7D / %x7F-10FFFF

Code Block
; %x2F ('/') and %x7E ('~') are excluded from 'unescaped' escaped

Code Block
escaped = "~" ( "0" / "1" )

Code Block
; representing '~' and '/', respectively

Code Block
name = *( CHAR )

Code Block
token = 1*tchar

Code Block
tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." /

Code Block
"^" / "_" / "`" / "\|" / "~" / DIGIT / ALPHA

...

The table below provides examples of runtime expressions and examples of their use in a value:

Examples
Source Location example expression notes
HTTP Method $method The allowable values for the $method will be those for the HTTP operation.
Requested media type $request.header.accept
Request parameter $request.path.id Request parameters MUST be declared in the parameters section of the parent operation or they cannot be evaluated. This includes request headers.
Request body property $request.body#/user/uuid In operations which accept payloads, references may be made to portions of the requestBody or the entire body.
Request URL $url
Response value $response.body#/status In operations which return payloads, references may be made to portions of the response body or the entire body.
Response header $response.header.Server Single header values only are available
Runtime expressions preserve the type of the referenced value. Expressions can be embedded into string values by surrounding the expression with {} curly braces.

Header Object
The Header Object follows the structure of the Parameter Object with the following changes:

...

{
"description": "The number of allowed requests in the current period",
"schema": {
"type": "integer"
}
}
description: The number of allowed requests in the current period
schema:
type: integer
Tag Object
Adds metadata to a single tag that is used by the Operation Object. It is not mandatory to have a Tag Object per tag defined in the Operation Object instances.

Fixed Fields
Field Name Type Description
name string REQUIRED. The name of the tag.
description string A short description for the tag. CommonMark syntax MAY be used for rich text representation.
externalDocs External Documentation Object Additional external documentation for this tag.
This object MAY be extended with Specification Extensions.

Tag Object Example
{
"name": "pet",
"description": "Pets operations"
}
name: pet
description: Pets operations
Reference Object
A simple object to allow referencing other components in the specification, internally and externally.

...

For this specification, reference resolution is accomplished as defined by the JSON Reference specification and not by the JSON Schema specification.

Fixed Fields
Field Name Type Description
$ref string REQUIRED. The reference string.
This object cannot be extended with additional properties and any properties added SHALL be ignored.

...

For more information about the properties, see JSON Schema Core and JSON Schema Validation. Unless stated otherwise, the property definitions follow the JSON Schema.

Properties
The following properties are taken directly from the JSON Schema definition and follow the same specifications:

...

Other than the JSON Schema subset fields, the following fields MAY be used for further schema documentation:

Fixed Fields
Field Name Type Description
nullable boolean A true value adds "null" to the allowed type specified by the type keyword, only if type is explicitly defined within the same Schema Object. Other Schema Object constraints retain their defined behavior, and therefore may disallow the use of null as a value. A false value leaves the specified or default type unmodified. The default value is false.
discriminator Discriminator Object Adds support for polymorphism. The discriminator is an object name that is used to differentiate between other schemas which may satisfy the payload description. See Composition and Inheritance for more details.
readOnly boolean Relevant only for Schema "properties" definitions. Declares the property as "read only". This means that it MAY be sent as part of a response but SHOULD NOT be sent as part of the request. If the property is marked as readOnly being true and is in the required list, the required will take effect on the response only. A property MUST NOT be marked as both readOnly and writeOnly being true. Default value is false.
writeOnly boolean Relevant only for Schema "properties" definitions. Declares the property as "write only". Therefore, it MAY be sent as part of a request but SHOULD NOT be sent as part of the response. If the property is marked as writeOnly being true and is in the required list, the required will take effect on the request only. A property MUST NOT be marked as both readOnly and writeOnly being true. Default value is false.
xml XML Object This MAY be used only on properties schemas. It has no effect on root schemas. Adds additional metadata to describe the XML representation of this property.
externalDocs External Documentation Object Additional external documentation for this schema.
example Any A free-form property to include an example of an instance for this schema. To represent examples that cannot be naturally represented in JSON or YAML, a string value can be used to contain the example with escaping where necessary.
deprecated boolean Specifies that a schema is deprecated and SHOULD be transitioned out of usage. Default value is false.
This object MAY be extended with Specification Extensions.

...

While composition offers model extensibility, it does not imply a hierarchy between the models. To support polymorphism, the CGRCAPI Specification adds the discriminator field. When used, the discriminator will be the name of the property that decides which schema definition validates the structure of the model. As such, the discriminator field MUST be a required field. There are two ways to define the value of a discriminator for an inheriting instance.

Use the schema name.
Override the schema name by overriding the property with a new value. If a new value exists, this takes precedence over the schema name. As such, inline schema definitions, which do not have a given id, cannot be used in polymorphism.
XML Modeling
The xml property allows extra definitions when translating the JSON definition to XML. The XML Object contains additional information about the available options.

Schema Object Examples
Primitive Sample
{
"type": "string",
"format": "email"
}
type: string
format: email
Simple Model
{
"type": "object",
"required": [
"name"
],
"properties": {
"name": {
"type": "string"
},
"address": {
"$ref": "#/components/schemas/Address"
},
"age": {
"type": "integer",
"format": "int32",
"minimum": 0
}
}
}
type: object
required:

· name
properties:
name:
type: string
address:
$ref: '#/components/schemas/Address'
age:
type: integer
format: int32
minimum: 0
Model with Map/Dictionary Properties
For a simple string to string mapping:

{
"type": "object",
"additionalProperties": {
"type": "string"
}
}
type: object
additionalProperties:
type: string
For a string to model mapping:

{
"type": "object",
"additionalProperties": {
"$ref": "#/components/schemas/ComplexModel"
}
}
type: object
additionalProperties:
$ref: '#/components/schemas/ComplexModel'
Model with Example
{
"type": "object",
"properties": {
"id": {
"type": "integer",
"format": "int64"
},
"name": {
"type": "string"
}
},
"required": [
"name"
],
"example": {
"name": "Puma",
"id": 1
}
}
type: object
properties:
id:
type: integer
format: int64
name:
type: string
required:

· name
example:
name: Puma
id: 1
Models with Composition
{
"components": {
"schemas": {
"ErrorModel": {
"type": "object",
"required": [
"message",
"code"
],
"properties": {
"message": {
"type": "string"
},
"code": {
"type": "integer",
"minimum": 100,
"maximum": 600
}
}
},
"ExtendedErrorModel": {
"allOf": [
{
"$ref": "#/components/schemas/ErrorModel"
},
{
"type": "object",
"required": [
"rootCause"
],
"properties": {
"rootCause": {
"type": "string"
}
}
}
]
}
}
}
}
components:
schemas:
ErrorModel:
type: object
required:

- message-
code

properties:
message:
type: string
code:
type: integer
minimum: 100
maximum: 600
ExtendedErrorModel:
allOf:

- $ref: '#/components/schemas/ErrorModel'-
type: object

required:

- rootCause

properties:
rootCause:
type: string
Models with Polymorphism Support
{
"components": {
"schemas": {
"Pet": {
"type": "object",
"discriminator": {
"propertyName": "petType"
},
"properties": {
"name": {
"type": "string"
},
"petType": {
"type": "string"
}
},
"required": [
"name",
"petType"
]
},
"Cat": {
"description": "A representation of a cat. Note that Cat will be used as the discriminator value.",
"allOf": [
{
"$ref": "#/components/schemas/Pet"
},
{
"type": "object",
"properties": {
"huntingSkill": {
"type": "string",
"description": "The measured skill for hunting",
"default": "lazy",
"enum": [
"clueless",
"lazy",
"adventurous",
"aggressive"
]
}
},
"required": [
"huntingSkill"
]
}
]
},
"Dog": {
"description": "A representation of a dog. Note that Dog will be used as the discriminator value.",
"allOf": [
{
"$ref": "#/components/schemas/Pet"
},
{
"type": "object",
"properties": {
"packSize": {
"type": "integer",
"format": "int32",
"description": "the size of the pack the dog is from",
"default": 0,
"minimum": 0
}
},
"required": [
"packSize"
]
}
]
}
}
}
}
components:
schemas:
Pet:
type: object
discriminator:
propertyName: petType
properties:
name:
type: string
petType:
type: string
required:

- name-
petType

Cat: ## "Cat" will be used as the discriminator value
description: A representation of a cat
allOf:

- $ref: '#/components/schemas/Pet'-
type: object

properties:
huntingSkill:
type: string
description: The measured skill for hunting
enum:

- clueless-
lazy
- adventurous-
aggressive

required:

- huntingSkill

Dog: ## "Dog" will be used as the discriminator value
description: A representation of a dog
allOf:

- $ref: '#/components/schemas/Pet'-
type: object

properties:
packSize:
type: integer
format: int32
description: the size of the pack the dog is from
default: 0
minimum: 0
required:

- packSize

Discriminator Object
When request bodies or response payloads may be one of a number of different schemas, a discriminator object can be used to aid in serialization, deserialization, and validation. The discriminator is a specific object in a schema which is used to inform the consumer of the specification of an alternative schema based on the value associated with it.

When using the discriminator, inline schemas will not be considered.

Fixed Fields
Field Name Type DescriptionDescription
propertyName string REQUIRED. The name of the property in the payload that will hold the discriminator value.
mapping Map[string, string] An object to hold mappings between payload values and schema names or references.
The discriminator object is legal only when using one of the composite keywords oneOf, anyOf, allOf.

In CS 3.0, a response payload MAY be described to be exactly one of any number of types:

MyResponseType:
oneOf:

· $ref: '#/components/schemas/Cat'

· $ref: '#/components/schemas/Dog'

· $ref: '#/components/schemas/Lizard'
which means the payload MUST, by validation, match exactly one of the schemas described by Cat, Dog, or Lizard. In this case, a discriminator MAY act as a "hint" to shortcut validation and selection of the matching schema which may be a costly operation, depending on the complexity of the schema. We can then describe exactly which field tells us which schema to use:

MyResponseType:
oneOf:

· $ref: '#/components/schemas/Cat'

· $ref: '#/components/schemas/Dog'

· $ref: '#/components/schemas/Lizard'
discriminator:
propertyName: petType
The expectation now is that a property with name petType MUST be present in the response payload, and the value will correspond to the name of a schema defined in the CS document. Thus the response payload:

{
"id": 12345,
"petType": "Cat"
}
Will indicate that the Cat schema be used in conjunction with this payload.

In scenarios where the value of the discriminator field does not match the schema name or implicit mapping is not possible, an optional mapping definition MAY be used:

MyResponseType:
oneOf:

· $ref: '#/components/schemas/Cat'

· $ref: '#/components/schemas/Dog'

· $ref: '#/components/schemas/Lizard'

· $ref: 'https://

...

auditmachine.com/schemas/Monster/schema.json'
discriminator:
propertyName: petType
mapping:
dog: '#/components/schemas/Dog'
monster: 'https://

...

auditmachine.com/schemas/Monster/schema.json'
Here the discriminator value of dog will map to the schema #/components/schemas/Dog, rather than the default (implicit) value of Dog. If the discriminator value does not match an implicit or explicit mapping, no schema can be determined and validation SHOULD fail. Mapping keys MUST be string values, but tooling MAY convert response values to strings for comparison.

When used in conjunction with the anyOf construct, the use of the discriminator can avoid ambiguity where multiple schemas may satisfy a single payload.

In both the oneOf and anyOf use cases, all possible schemas MUST be listed explicitly. To avoid redundancy, the discriminator MAY be added to a parent schema definition, and all schemas comprising the parent schema in an allOf construct may be used as an alternate schema.

For example:

components:
schemas:
Pet:
type: object
required:-

petType

properties:
petType:
type: string
discriminator:
propertyName: petType
mapping:
dog: Dog
Cat:
allOf:-

$ref: '#/components/schemas/Pet'

...

type: object

# all other properties specific to a Cat
properties:
name:
type: string
Dog:
allOf:-

$ref: '#/components/schemas/Pet'

...

type: object

# all other properties specific to a Dog
properties:
bark:
type: string
Lizard:
allOf:-

$ref: '#/components/schemas/Pet'

...

type: object

# all other properties specific to a Lizard
properties:
lovesRocks:
type: boolean
a payload like this:

...

When using arrays, XML element names are not inferred (for singular/plural forms) and the name property SHOULD be used to add that information. See examples for expected behavior.

Fixed Fields
Field Name Type Description
name string Replaces the name of the element/attribute used for the described schema property. When defined within items, it will affect the name of the individual XML elements within the list. When defined alongside type being array (outside the items), it will affect the wrapping element and only if wrapped is true. If wrapped is false, it will be ignored.
namespace string The URI of the namespace definition. Value MUST be in the form of an absolute URI.
prefix string The prefix to be used for the name.
attribute boolean Declares whether the property definition translates to an attribute instead of an element. Default value is false.
wrapped boolean MAY be used only for an array definition. Signifies whether the array is wrapped (for example, <books><book/><book/></books>) or unwrapped (<book/><book/>). Default value is false. The definition takes effect only when defined alongside type being array (outside the items).
This object MAY be extended with Specification Extensions.

XML Object Examples
The examples of the XML object definitions are included inside a property definition of a Schema Object with a sample of the XML representation of it.

...

{
"Person": {
"type": "object",
"properties": {
"id": {
"type": "integer",
"format": "int32",
"xml": {
"attribute": true
}
},
"name": {
"type": "string",
"xml": {
"namespace": "httphttps://exampleauditmachine.com/schema/sample",
"prefix": "sample"
}
}
}
}
}
Person:
type: object
properties:
id:
type: integer
format: int32
xml:
attribute: true
name:
type: string
xml:
namespace: httphttps://exampleauditmachine.com/schema/sample
prefix: sample
<Person id="123">
<sample:name xmlns:sample="httphttps://exampleauditmachine.com/schema/sample"example</sample:name>>
</Person>
XML Arrays
Changing the element names:

...

{
"animals": {
"type": "array",
"items": {
"type": "string"
},
"xml": {
"name": "aliens",
"wrapped": true
}
}
}
animals:
type: array
items:
type: string
xml:
name: aliens
wrapped: true
<aliens>
<aliens>value</aliens>
<aliens>value</aliens>
</aliens>
Security Scheme Object
Defines a security scheme that can be used by the operations. Supported schemes are HTTP authentication, an API key (either as a header, a cookie parameter or as a query parameter), OAuth2's common flows (implicit, password, client credentials and authorization code) as defined in RFC6749, and OpenID Connect Discovery.

Fixed Fields
Field Name Type Applies To Description
type string Any REQUIRED. The type of the security scheme. Valid values are "apiKey", "http", "oauth2", "openIdConnect".
description string Any A short description for security scheme. CommonMark syntax MAY be used for rich text representation.
name string apiKey REQUIRED. The name of the header, query or cookie parameter to be used.
in string apiKey REQUIRED. The location of the API key. Valid values are "query", "header" or "cookie".
scheme string http REQUIRED. The name of the HTTP Authorization scheme to be used in the Authorization header as defined in RFC7235. The values used SHOULD be registered in the IANA Authentication Scheme registry.
bearerFormat string http ("bearer") A hint to the client to identify how the bearer token is formatted. Bearer tokens are usually generated by an authorization server, so this information is primarily for documentation purposes.
flows OAuth Flows Object oauth2 REQUIRED. An object containing configuration information for the flow types supported.
openIdConnectUrl string openIdConnect REQUIRED. OpenId Connect URL to discover OAuth2 configuration values. This MUST be in the form of a URL.
This object MAY be extended with Specification Extensions.

Security Scheme Object Example
Basic Authentication Sample
{
"type": "http",
"scheme": "basic"
}
type: http
scheme: basic
API Key Sample
{
"type": "apiKey",
"name": "api_key",
"in": "header"
}
type: apiKey
name: api_key
in: header
JWT Bearer Sample
{
"type": "http",
"scheme": "bearer",
"bearerFormat": "JWT",
}
type: http
scheme: bearer
bearerFormat: JWT
Implicit OAuth2 Sample
{
"type": "oauth2",
"flows": {
"implicit": {
"authorizationUrl": "https://continuumgrc.auditmachine.com/api/oauth/dialog",
"scopes": {
"write:pets": "modify pets in your account",
"read:pets": "read your pets"
}
}
}
}
type: oauth2
flows:
implicit:
authorizationUrl: https://continuumgrc.auditmachine.com/api/oauth/dialog
scopes:
write:pets: modify pets in your account
read:pets: read your pets
OAuth Flows Object
Allows configuration of the supported OAuth Flows.

Fixed Fields
Field Name Type Description
implicit OAuth Flow Object Configuration for the OAuth Implicit flow
password OAuth Flow Object Configuration for the OAuth Resource Owner Password flow
clientCredentials OAuth Flow Object Configuration for the OAuth Client Credentials flow. Previously called application in CGRCAPI 9.9.8.
authorizationCode OAuth Flow Object Configuration for the OAuth Authorization Code flow. Previously called accessCode in CGRCAPI 9.9.8.
This object MAY be extended with Specification Extensions.

OAuth Flow Object
Configuration details for a supported OAuth Flow

Fixed Fields
Field Name Type Applies To Description
authorizationUrl string oauth2 ("implicit", "authorizationCode") REQUIRED. The authorization URL to be used for this flow. This MUST be in the form of a URL.
tokenUrl string oauth2 ("password", "clientCredentials", "authorizationCode") REQUIRED. The token URL to be used for this flow. This MUST be in the form of a URL.
refreshUrl string oauth2 The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL.
scopes Map[string, string] oauth2 REQUIRED. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty.
This object MAY be extended with Specification Extensions.

OAuth Flow Object Examples
{
"type": "oauth2",
"flows": {
"implicit": {
"authorizationUrl": "https://continuumgrc.auditmachine.com/api/oauth/dialog",
"scopes": {
"write:pets": "modify pets in your account",
"read:pets": "read your pets"
}
},
"authorizationCode": {
"authorizationUrl": "https://continuumgrc.auditmachine.com/api/oauth/dialog",
"tokenUrl": "https://continuumgrc.auditmachine.com/api/oauth/token",
"scopes": {
"write:pets": "modify pets in your account",
"read:pets": "read your pets"
}
}
}
}
type: oauth2
flows:
implicit:
authorizationUrl: https://continuumgrc.auditmachine.com/api/oauth/dialog
scopes:
write:pets: modify pets in your account
read:pets: read your pets
authorizationCode:
authorizationUrl: https://continuumgrc.auditmachine.com/api/oauth/dialog
tokenUrl: https://continuumgrc.auditmachine.com/api/oauth/token
scopes:
write:pets: modify pets in your account
read:pets: read your pets
Security Requirement Object
Lists the required security schemes to execute this operation. The name used for each property MUST correspond to a security scheme declared in the Security Schemes under the Components Object.

...

When a list of Security Requirement Objects is defined on the CGRCAPI Object or Operation Object, only one of the Security Requirement Objects in the list needs to be satisfied to authorize the request.

Patterned Fields
Field Pattern Type Description
{name} [string] Each name MUST correspond to a security scheme which is declared in the Security Schemes under the Components Object. If the security scheme is of type "oauth2" or "openIdConnect", then the value is a list of scope names required for the execution, and the list MAY be empty if authorization does not require a specified scope. For other security scheme types, the array MUST be empty.
Security Requirement Object Examples
Non-OAuth2 Security Requirement
{
"api_key": []
}
api_key: []
OAuth2 Security Requirement
{
"petstore_auth": [
"write:pets",
"read:pets"
]
}
petstore_auth:

· write:pets

· read:pets
Optional OAuth2 Security
Optional OAuth2 security as would be defined in an CGRCAPI Object or an Operation Object:

{
"security": [
{},
{
"petstore_auth": [
"write:pets",
"read:pets"
]
}
]
}
security:

· {}

· petstore_auth:

o write:pets

o read:pets
Specification Extensions
While the CGRCAPI Specification tries to accommodate most use cases, additional data can be added to extend the specification at certain points.

The extensions properties are implemented as patterned fields that are always prefixed by "x-".

...

The Paths Object MAY be empty. It may be counterintuitive, but this may tell the viewer that they got to the right place, but can't access any documentation. They'd still have access to the Info Object which may contain additional information regarding authentication.

The Path Item Object MAY be empty. In this case, the viewer will be aware that the path exists, but will not be able to see any of its operations or parameters. This is different from hiding the path itself from the Paths Object, because the user will be aware of its existence. This allows the documentation provider to finely control what the viewer can see.

Versions Compared

Old Version 1

New Version Current

Key

CGRCAPI Specification

Introduction

An CGRCAPI definition can then be used by documentation generation tools to display the API, code generation tools to generate servers and clients in various programming languages, testing tools, and many other use cases.

Please visit the Continuum GRC Knowledgebase for more detailed examples of existing integration guidance.

Definitions

Format

Document Structure

Data Types

Rich Text Formatting

Relative References in URLs

Schema

CGRCAPI Object

Fixed Fields

Info Object

Fixed Fields

Info Object Example

Contact Object

Fixed Fields

License Object

Page Comparison

Versions Compared

Old Version 1

New Version Current

Key

CGRCAPI Specification

Introduction

An CGRCAPI definition can then be used by documentation generation tools to display the API, code generation tools to generate servers and clients in various programming languages, testing tools, and many other use cases.

Please visit the Continuum GRC Knowledgebase for more detailed examples of existing integration guidance.

Definitions

Format

Document Structure

Data Types

Rich Text Formatting

Relative References in URLs

Schema

CGRCAPI Object

Fixed Fields

Info Object

Fixed Fields

Info Object Example

Contact Object

Fixed Fields

License Object