{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
        "contacts": {
            "type": "object",
            "additionalProperties": {
                "$ref": "#/definitions/Contact"
            }
        }
    },
    "required": [
        "contacts"
    ],
    "definitions": {
        "Contact": {
            "type": "object",
            "properties": {
                "firstName": {
                    "type": "string"
                },
                "lastName": {
                    "type": "string"
                },
                "birthday": {
                    "type": "string",
                    "format": "date-time"
                },
                "title": {
                    "enum": [
                        "Mr.",
                        "Mrs.",
                        "Ms.",
                        "Prof."
                    ],
                    "type": "string"
                },
                "emails": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    }
                },
                "phones": {
                    "type": "array",
                    "items": {
                        "$ref": "#/definitions/PhoneNumber"
                    }
                },
                "highScore": {
                    "type": "integer"
                }
            },
            "required": [
                "emails",
                "firstName",
                "highScore",
                "phones"
            ]
        },
        "PhoneNumber": {
            "type": "object",
            "properties": {
                "number": {
                    "type": "string"
                },
                "label": {
                    "description": "An optional label (e.g. \"mobile\")",
                    "type": "string"
                }
            },
            "required": [
                "number"
            ]
        }
    }
}