required : Boolean

required

Boolean

An object instance is valid if the name of the required property exists in the instance.

Value This keyword is defined in the property definition subschema where a value must be defined within an instance
Kind Assertion
Applies To Object
Dialect Draft 3
Changed In Draft 4
Introduced In Draft 3
Vocabulary Core
Specification https://json-schema.org/draft-03/draft-zyp-json-schema-03.pdf#5.7
Metaschema http://json-schema.org/draft-03/schema#
Official Tests draft3/required.json
Default false
Annotation None
Affected By None
Affects None
Also See

Examples

Schema with 'required' keyword Schema 
{
  "$schema": "http://json-schema.org/draft-03/schema#",
  "type": "object",
  "properties": { 
    "person": {
        "type": "string",
        "required": true
    }
  }
}
Valid An object instance with the required property defined is valid Instance 
{ "person": "John Doe" }
Invalid An object instance not containing the required property is invalid Instance 
{ "age": 10 }