Draft 6 Dialect

JSON Schema Draft 6 is a JSON media type for defining the structure of JSON data. JSON Schema is intended to define validation, documentation, hyperlink navigation, and interaction control of JSON data.

Specification	https://json-schema.org/draft-06/draft-wright-json-schema-01
Authors	Austin Wright Henry Andrews Geraint Luff
Metaschema	http://json-schema.org/draft-06/schema#
Implementations	https://bowtie.report/#/dialects/draft6
Release Notes	https://json-schema.org/draft-06/json-schema-release-notes

Using this dialect

To make use of this dialect, declare your schemas to have the dialect metaschema using the $schema keyword. For example:

{
  "$schema": "http://json-schema.org/draft-06/schema#" 
}

Citing this dialect

The recommended way to cite the JSON Schema Draft 6 dialect using BibTex is as follows:

@techreport{json-schema-draft6,
  title = { JSON Schema: A Media Type for Describing JSON Documents },
  author = { Wright, Austin and Andrews, Henry and Luff, Geraint },
  organization = { JSON Schema },
  year = { 2017 },
  url = { https://json-schema.org/draft-06/draft-wright-json-schema-01 }
}

Vocabularies

A curated set of vocabularies defined for this JSON Schema dialect.

Core Official Included By Default

The vocabulary that defines JSON Schema core terminology and mechanisms, including pointing to another JSON Schema by reference, dereferencing a JSON Schema reference, and specifying the vocabulary being used. Read more about this vocabulary.

Keyword	Kind	Instance	Summary
$id	Identifier	Any	This keyword declares an identifier for the schema resource.
$schema	Identifier	Any	This keyword is both used as a JSON Schema dialect identifier and as a reference to a JSON Schema which describes the set of valid schemas written for this particular dialect.
$ref	Applicator	Any	This keyword is used to reference a statically identified schema.

Validation Official Included By Default

A vocabulary that defines keywords that impose requirements for successful validation of an instance. Read more about this vocabulary.

Keyword	Kind	Instance	Summary
type	Assertion	Any	Validation succeeds if the type of the instance matches the type represented by the given type, or matches at least one of the given types.
enum	Assertion	Any	Validation succeeds if the instance is equal to one of the elements in this keyword’s array value.
const	Assertion	Any	Validation succeeds if the instance is equal to this keyword’s value.
multipleOf	Assertion	Number	A numeric instance is valid only if division by this keyword’s value results in an integer.
maximum	Assertion	Number	Validation succeeds if the numeric instance is less than or equal to the given number.
exclusiveMaximum	Assertion	Number	Validation succeeds if the numeric instance is less than the given number.
minimum	Assertion	Number	Validation succeeds if the numeric instance is greater than or equal to the given number.
exclusiveMinimum	Assertion	Number	Validation succeeds if the numeric instance is greater than the given number.
maxLength	Assertion	String	A string instance is valid against this keyword if its length is less than, or equal to, the value of this keyword.
minLength	Assertion	String	A string instance is valid against this keyword if its length is greater than, or equal to, the value of this keyword.
pattern	Assertion	String	A string instance is considered valid if the regular expression matches the instance successfully.
items	Applicator	Array	If set to a schema, validation succeeds if each element of the instance validates against it, otherwise validation succeeds if each element of the instance validates against the schema at the same position, if any
additionalItems	Applicator	Array	If `items` is set to an array of schemas, validation succeeds if each element of the instance not covered by it validates against this schema.
maxItems	Assertion	Array	An array instance is valid if its size is less than, or equal to, the value of this keyword.
minItems	Assertion	Array	An array instance is valid if its size is greater than, or equal to, the value of this keyword.
uniqueItems	Assertion	Array	If this keyword is set to the boolean value true, the instance validates successfully if all of its elements are unique.
contains	Applicator	Array	Validation succeeds if the instance contains an element that validates against this schema.
maxProperties	Assertion	Object	An object instance is valid if its number of properties is less than, or equal to, the value of this keyword.
minProperties	Assertion	Object	An object instance is valid if its number of properties is greater than, or equal to, the value of this keyword.
required	Assertion	Object	An object instance is valid against this keyword if every item in the array is the name of a property in the instance.
properties	Applicator	Object	Validation succeeds if, for each name that appears in both the instance and as a name within this keyword’s value, the child instance for that name successfully validates against the corresponding schema.
patternProperties	Applicator	Object	Validation succeeds if, for each instance name that matches any regular expressions that appear as a property name in this keyword’s value, the child instance for that name successfully validates against each schema that corresponds to a matching regular expression.
additionalProperties	Applicator	Object	Validation succeeds if the schema validates against each value not matched by other object applicators in this vocabulary.
dependencies	Assertion	Object	Validation succeeds if, for each name that appears in both the instance and as a name within this keyword’s value, either every item in the corresponding array is also the name of a property in the instance or the corresponding subschema successfully evaluates against the instance.
propertyNames	Applicator	Object	Validation succeeds if the schema validates against every property name in the instance.
allOf	Applicator	Any	An instance validates successfully against this keyword if it validates successfully against all schemas defined by this keyword’s value.
anyOf	Applicator	Any	An instance validates successfully against this keyword if it validates successfully against at least one schema defined by this keyword’s value.
oneOf	Applicator	Any	An instance validates successfully against this keyword if it validates successfully against exactly one schema defined by this keyword’s value.
not	Applicator	Any	An instance is valid against this keyword if it fails to validate successfully against the schema defined by this keyword.
format	Annotation	String	Define semantic information about a string instance.
definitions	Reserved Location	Any	This keyword reserves a location for schema authors to inline re-usable JSON Schemas into a more general schema.
title	Annotation	Any	A preferably short description about the purpose of the instance described by the schema.
description	Annotation	Any	An explanation about the purpose of the instance described by the schema.
default	Annotation	Any	This keyword can be used to supply a default JSON value associated with a particular schema.
examples	Annotation	Any	This keyword is used to provide sample JSON values associated with a particular schema, for the purpose of illustrating usage.