epoberezkin/ajv

{
  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "$id": "https://json-schema.org/draft/2019-09/meta/validation",
  "$vocabulary": {
    "https://json-schema.org/draft/2019-09/vocab/validation": true
  },
  "$recursiveAnchor": true,

  "title": "Validation vocabulary meta-schema",
  "type": ["object", "boolean"],
  "properties": {
    "multipleOf": {
      "type": "number",
      "exclusiveMinimum": 0
    },
    "maximum": {
      "type": "number"
    },
    "exclusiveMaximum": {
      "type": "number"
    },
    "minimum": {
      "type": "number"
    },
    "exclusiveMinimum": {
      "type": "number"
    },
    "maxLength": {"$ref": "#/$defs/nonNegativeInteger"},
    "minLength": {"$ref": "#/$defs/nonNegativeIntegerDefault0"},
    "pattern": {
      "type": "string",
      "format": "regex"
    },
    "maxItems": {"$ref": "#/$defs/nonNegativeInteger"},
    "minItems": {"$ref": "#/$defs/nonNegativeIntegerDefault0"},
    "uniqueItems": {
      "type": "boolean",
      "default": false
    },
    "maxContains": {"$ref": "#/$defs/nonNegativeInteger"},
    "minContains": {
      "$ref": "#/$defs/nonNegativeInteger",
      "default": 1
    },
    "maxProperties": {"$ref": "#/$defs/nonNegativeInteger"},
    "minProperties": {"$ref": "#/$defs/nonNegativeIntegerDefault0"},
    "required": {"$ref": "#/$defs/stringArray"},
    "dependentRequired": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/$defs/stringArray"
      }
    },
    "const": true,
    "enum": {
      "type": "array",
      "items": true
    },
    "type": {
      "anyOf": [
        {"$ref": "#/$defs/simpleTypes"},
        {
          "type": "array",
          "items": {"$ref": "#/$defs/simpleTypes"},
          "minItems": 1,
          "uniqueItems": true
        }
      ]
    }
  },
  "$defs": {
    "nonNegativeInteger": {
      "type": "integer",
      "minimum": 0
    },
    "nonNegativeIntegerDefault0": {
      "$ref": "#/$defs/nonNegativeInteger",
      "default": 0
    },
    "simpleTypes": {
      "enum": ["array", "boolean", "integer", "null", "number", "object", "string"]
    },
    "stringArray": {
      "type": "array",
      "items": {"type": "string"},
      "uniqueItems": true,
      "default": []
    }
  }
}