{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://www.cityjson.org/schemas/1.1.3/metadata.schema.json",
  "title": "CityJSON metadata schema v1.1.3",

  "definitions": {  
    "contactDetails": {
      "type": "object",
      "properties": {
        "contactName": {
          "type": "string"
        },
        "phone": {
          "type": "string"
        },
        "address": {
          "type": "string"
        },
        "emailAddress": {
          "type": "string",
          "format": "email"
        },
        "contactType": {
          "type": "string",
          "enum": [ "individual", "organization" ]
        },
        "role": {
          "type": "string",
          "description": "from ISO 19115 codelist",
          "enum": [
            "resourceProvider",
            "custodian",
            "owner",
            "user",
            "distributor",
            "originator",
            "pointOfContact",
            "principalInvestigator",
            "processor",
            "publisher",
            "author",
            "sponsor",
            "co-author",
            "collaborator",
            "editor",
            "mediator",
            "rightsHolder",
            "contributor",
            "funder",
            "stakeholder"
          ]
        },
        "organization": {
          "type": "string"
        },
        "website": {
          "type": "string",
          "format": "uri",
          "pattern": "^(https?)://"
        }
      },
      "required": [
            "contactName",
            "emailAddress"
      ],
      "additionalProperties": false
    }
  },
  "metadata": {
    "type": "object",
    "properties": {
      "identifier": {
        "type": "string"
      },
      "pointOfContact": {
        "$ref": "#/definitions/contactDetails"
      },
      "referenceDate": {
        "type": "string",
        "format": "date"
      },
      "title": {
        "type": "string"
      },
      "geographicalExtent": {
        "type": "array",
        "items": {
          "type": "number"
        },
        "minItems": 6,
        "maxItems": 6
      },
      "referenceSystem": {
        "type": "string",
        "pattern": "^(http|https)://www.opengis.net/def/crs/"
      }
    },
    "additionalProperties": false
  }
}