{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://json-schema.org/draft/2020-12/meta/validation",
  "$dynamicAnchor": "meta",

  "title": "Validation vocabulary meta-schema",
  "type": ["object", "boolean"],
  "properties": {
    "type": {
      "anyOf": [
        { "$ref": "#/$defs/simpleTypes" },
        {
          "type": "array",
          "items": { "$ref": "#/$defs/simpleTypes" },
          "minItems": 1,
          "uniqueItems": true
        }
      ]
    },
    "const": true,
    "enum": {
      "type": "array",
      "items": true
    },
    "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"
      }
    }
  },
  "$defs": {
    "nonNegativeInteger": {
      "type": "integer",
      "minimum": 0
    },
    "nonNegativeIntegerDefault0": {
      "$ref": "#/$defs/nonNegativeInteger",
      "default": 0
    },
    "simpleTypes": {
      "enum": [
        "array",
        "boolean",
        "integer",
        "null",
        "number",
        "object",
        "string"
      ]
    },
    "stringArray": {
      "type": "array",
      "items": { "type": "string" },
      "uniqueItems": true,
      "default": []
    }
  }
}