buildSchema

This keyword is reserved for comments from schema authors to readers or maintainers of the schema. The value of this keyword MUST be a string. Implementations MUST NOT present this string to end users. Tools for editing schemas SHOULD support displaying and editing this keyword.

The "$id" keyword defines a URI for the schema, and the base URI that other URI references within the schema are resolved against. A subschema's "$id" is resolved against the base URI of its parent schema. If no parent sets an explicit base with "$id", the base URI is that of the entire document, as determined per [RFC 3986 section 5][RFC3986].

The "$ref" keyword is used to reference a schema, and provides the ability to validate recursive structures through self-reference.

The "$schema" keyword is both used as a JSON Schema version identifier and the location of a resource which is itself a JSON Schema, which describes any schema written for this particular version.

The value of "additionalItems" MUST be a valid JSON Schema.

The value of "additionalProperties" MUST be a valid JSON Schema.

This keyword's value MUST be a non-empty array. Each item of the array MUST be a valid JSON Schema.

This keyword's value MUST be a non-empty array. Each item of the array MUST be a valid JSON Schema.

The value of this keyword MAY be of any type, including null.

The value of this keyword MUST be a valid JSON Schema.

If the instance value is a string, this property defines that the string SHOULD be interpreted as binary data and decoded using the encoding named by this property. [RFC 2045, Sec 6.1][RFC2045] lists the possible values for this property.

The value of this property must be a media type, as defined by [RFC 2046][RFC2046]. This property defines the media type of instances which this schema defines.

There are no restrictions placed on the value of this keyword. When multiple occurrences of this keyword are applicable to a single sub-instance, implementations SHOULD remove duplicates.

The "definitions" keywords provides a standardized location for schema authors to inline re-usable JSON Schemas into a more general schema. The keyword does not directly affect the validation result.

This keyword specifies rules that are evaluated if the instance is an object and contains a certain property.

Can be used to decorate a user interface with explanation or information about the data produced.

This keyword's value MUST be a valid JSON Schema.

The value of this keyword MUST be an array. This array SHOULD have at least one element. Elements in the array SHOULD be unique.

The value of this keyword MUST be an array. There are no restrictions placed on the values within the array. When multiple occurrences of this keyword are applicable to a single sub-instance, implementations MUST provide a flat array of all values rather than an array of arrays.

The value of "exclusiveMaximum" MUST be number, representing an exclusive upper limit for a numeric instance.

The value of "exclusiveMinimum" MUST be number, representing an exclusive lower limit for a numeric instance.

The "format" keyword functions as both an [annotation][annotation] and as an [assertion][assertion]. While no special effort is required to implement it as an annotation conveying semantic meaning, implementing validation is non-trivial.

This keyword's value MUST be a valid JSON Schema.

The value of "items" MUST be either a valid JSON Schema or an array of valid JSON Schemas.

The value of this keyword MUST be a non-negative integer.

The value of this keyword MUST be a non-negative integer.

The value of this keyword MUST be a non-negative integer.

The value of "maximum" MUST be a number, representing an inclusive upper limit for a numeric instance.

The value of this keyword MUST be a non-negative integer.

The value of this keyword MUST be a non-negative integer.

The value of this keyword MUST be a non-negative integer.

The value of "minimum" MUST be a number, representing an inclusive lower limit for a numeric instance.

The value of "multipleOf" MUST be a number, strictly greater than 0.

This keyword's value MUST be a valid JSON Schema.

This keyword's value MUST be a non-empty array. Each item of the array MUST be a valid JSON Schema.

The value of this keyword MUST be a string. This string SHOULD be a valid regular expression, according to the ECMA 262 regular expression dialect.

The value of "patternProperties" MUST be an object. Each property name of this object SHOULD be a valid regular expression, according to the ECMA 262 regular expression dialect. Each property value of this object MUST be a valid JSON Schema.

The value of "properties" MUST be an object. Each value of this object MUST be a valid JSON Schema.

The value of "propertyNames" MUST be a valid JSON Schema.

The value of this keywords MUST be a boolean. When multiple occurrences of this keyword are applicable to a single sub-instance, the resulting value MUST be true if any occurrence specifies a true value, and MUST be false otherwise.

The value of this keyword MUST be an array. Elements of this array, if any, MUST be strings, and MUST be unique.

This keyword's value MUST be a valid JSON Schema.

Can be used to decorate a user interface with a short label about the data produced.

The value of this keyword MUST be a boolean.

The value of this keyword MUST be a boolean. When multiple occurrences of this keyword is applicable to a single sub-instance, the resulting value MUST be true if any occurrence specifies a true value, and MUST be false otherwise.