{
  "definitions": {
    "stringOrPropertyList": {
      "oneOf": [
        {
          "type": "string"
        },
        {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {
            "type": "string",
            "property-reference": {
              "comment": "property-reference is an extension to the JSON schema validator. Here it jumps 3 levels up in the hierarchy and tests if a value is an existing key in descriptors. See test/validate-schema.js for implementation details.",
              "$data": "3"
            }
          }
        }
      ]
    }
  },
  "type": "object",
  "additionalProperties": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "syntax": {
        "type": "string"
      },
      "interfaces": {
        "type": "array",
        "items": {
          "type": "string"
        }
      },
      "groups": {
        "type": "array",
        "minitems": 1,
        "uniqueItems": true,
        "items": {
          "$ref": "definitions.json#/groupList"
        }
      },
      "descriptors": {
        "type": "object",
        "additionalProperties": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "syntax": {
              "type": "string"
            },
            "media": {
              "oneOf": [
                {
                  "type": "string",
                  "enum": [
                    "all",
                    "continuous",
                    "paged",
                    "visual"
                  ]
                },
                {
                  "type": "array",
                  "minItems": 2,
                  "uniqueItems": true,
                  "items": {
                    "type": "string",
                    "enum": [
                      "continuous",
                      "paged",
                      "visual"
                    ]
                  }
                }
              ]
            },
            "initial": {
              "$ref": "#/definitions/stringOrPropertyList"
            },
            "percentages": {
              "$ref": "#/definitions/stringOrPropertyList"
            },
            "computed": {
              "$ref": "#/definitions/stringOrPropertyList"
            },
            "order": {
              "enum": [
                "orderOfAppearance",
                "uniqueOrder"
              ]
            },
            "status": {
              "enum": [
                "standard",
                "nonstandard",
                "experimental"
              ]
            }
          },
          "required": [
            "syntax",
            "media",
            "initial",
            "percentages",
            "computed",
            "order",
            "status"
          ]
        }
      },
      "status": {
        "enum": [
          "standard",
          "nonstandard",
          "experimental"
        ]
      },
      "mdn_url": {
        "type": "string",
        "pattern": "^https://developer.mozilla.org/docs/Web/CSS/"
      }
    },
    "required": [
      "syntax",
      "groups",
      "status"
    ]
  }
}