{
  "$comment": "validate maps, in particular those with constrained string keys",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "MapWithKeys": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/Value"
      },
      "propertyNames": {
        "$ref": "#/definitions/Eh"
      }
    },
    "Value": {
      "type": "string"
    },
    "Eh": {
      "type": "string",
      "format": "^a*$"
    },
    "MapWithDateTimeKeys": {
      "$comment": "test that a type isn't needed for propertyNames",
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/Value"
      },
      "propertyNames": {
        "format": "date-time"
      }
    },
    "MapWithDateKeys": {
      "$comment": "test that a type isn't needed for propertyNames",
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/Value"
      },
      "propertyNames": {
        "format": "date"
      }
    }
  },
  "$comment": "usual case of a map whose name must come from its title",
  "title": "DeadSimple",
  "type": "object"
}