{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "JSON API Schema",
  "description": "This is a schema for responses in the JSON API format. For more, see http://jsonapi.org",
  "type": "object",
  "required": [
    "errors"
  ],
  "properties": {
    "errors": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/error"
      },
      "uniqueItems": true
    },
    "meta": {
      "$ref": "#/definitions/meta"
    },
    "links": {
      "$ref": "#/definitions/links"
    }
  },
  "additionalProperties": false,
  "definitions": {    
    "meta": {
      "description": "Non-standard meta-information that can not be represented as an attribute or relationship.",
      "type": "object",
      "additionalProperties": true
    },
    "links": {
      "description": "A resource object **MAY** contain references to other resource objects (\"relationships\"). Relationships may be to-one or to-many. Relationships can be specified by including a member in a resource's links object.",
      "type": "object",
      "properties": {
        "self": {
          "description": "A `self` member, whose value is a URL for the relationship itself (a \"relationship URL\"). This URL allows the client to directly manipulate the relationship. For example, it would allow a client to remove an `author` from an `article` without deleting the people resource itself.",
          "type": "string",
          "format": "uri"
        },
        "related": {
          "$ref": "#/definitions/link"
        }
      },
      "additionalProperties": true
    },
    "link": {
      "description": "A link **MUST** be represented as either: a string containing the link's URL or a link object.",
      "oneOf": [
        {
          "description": "A string containing the link's URL.",
          "type": "string",
          "format": "uri"
        },
        {
          "type": "object",
          "required": [
            "href"
          ],
          "properties": {
            "href": {
              "description": "A string containing the link's URL.",
              "type": "string",
              "format": "uri"
            },
            "meta": {
              "$ref": "#/definitions/meta"
            }
          }
        }
      ]
    },  
    "error": {
      "type": "object",
      "properties": {
        "id": {
          "description": "A unique identifier for this particular occurrence of the problem.",
          "type": "string"
        },
        "links": {
          "$ref": "#/definitions/links"
        },
        "status": {
          "description": "The HTTP status code applicable to this problem, expressed as a string value.",
          "type": "string"
        },
        "code": {
          "description": "An application-specific error code, expressed as a string value.",
          "type": "string"
        },
        "title": {
          "description": "A short, human-readable summary of the problem. It **SHOULD NOT** change from occurrence to occurrence of the problem, except for purposes of localization.",
          "type": "string"
        },
        "detail": {
          "description": "A human-readable explanation specific to this occurrence of the problem.",
          "type": "string"
        },
        "source": {
          "type": "object",
          "properties": {
            "pointer": {
              "description": "A JSON Pointer [RFC6901] to the associated entity in the request document [e.g. \"/data\" for a primary data object, or \"/data/attributes/title\" for a specific attribute].",
              "type": "string"
            },
            "parameter": {
              "description": "A string indicating which query parameter caused the error.",
              "type": "string"
            }
          }
        },
        "meta": {
          "$ref": "#/definitions/meta"
        }
      },
      "additionalProperties": false
    }
  }
}