Does JSON Schema support inheritance?
Because there is no such thing as schema inheritance currently defined. When using allOf , you require that all schemas in allOf match; and if you are strict about what can exist in this or that JSON, you’ll have added additionalProperties to false . As such, you cannot inherit.
How do I check if a JSON Schema is valid?
The simplest way to check if JSON is valid is to load the JSON into a JObject or JArray and then use the IsValid(JToken, JsonSchema) method with the JSON Schema. To get validation error messages, use the IsValid(JToken, JsonSchema, IList ) or Validate(JToken, JsonSchema, ValidationEventHandler) overloads.
How do I extend a JSON Schema?
When extending a schema, you need to redefine any recursive reference used in the original schema. JSON Schemas (including meta-schemas) are immutable. You can’t selectively modify an existing schema. Your meta schema only validates the $role keyword, all other keywords are validated by the draft-07 meta schema.
What is oneOf in JSON Schema?
Here oneOf is a keyword construct in the JSON Schema, which is used to provide an array of criteria where, if exactly one of them is valid, the whole block is valid.
How do you declare an array in JSON Schema?
In the following example, we define that each item in an array is a number:
- { “type”: “array”, “items”: { “type”: “number” } }
- [1, 2, 3, 4, 5] A single “non-number” causes the whole array to be invalid:
- [1, 2, “3”, 4, 5] The empty array is always valid:
- []
What is JSON Schema file?
JSON Schema is an IETF standard providing a format for what JSON data is required for a given application and how to interact with it. Applying such standards for a JSON document lets you enforce consistency and data validity across similar JSON data.
What is JSON Schema validation?
Overview. JSON Schema validation asserts constraints on the structure of instance data. An instance location that satisfies all asserted constraints is then annotated with any keywords that contain non-assertion information, such as descriptive metadata and usage hints.
Which data format is JSON Schema written in?
Data types Because JSON Schema is written in JSON format, it supports all JSON types plus an addition: the integer type, which is a subtype of the number type.
How do I reference a JSON Schema?
In a JSON schema, a $ref keyword is a JSON Pointer to a schema, or a type or property in a schema. A JSON pointer takes the form of A # B in which: A is the relative path from the current schema to a target schema. If A is empty, the reference is to a type or property in the same schema, an in-schema reference.
How do you reference a JSON Schema in another JSON Schema?
A schema can reference another schema using the $ref keyword. The value of $ref is a URI-reference that is resolved against the schema’s Base URI. When evaluating a $ref , an implementation uses the resolved identifier to retrieve the referenced schema and applies that schema to the instance.
What is the difference between oneOf and anyOf?
Difference Between anyOf and oneOf oneOf matches exactly one subschema, and anyOf can match one or more subschemas.
What is anyOf in JSON Schema?
Essentially each can contain a number of schemas, each schema is validated against the instance value. AnyOf : One or more of the contained schemas must validate against the instance value. OneOf : One (and only one) of the contained schemas must validate against the instance value.