{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "CallbackMessage": {
      "type": "object",
      "properties": {
        "feed_location": {
          "$ref": "#/definitions/FeedLocation"
        },
        "feed_definition": {
          "$ref": "#/definitions/FeedDefinition"
        },
        "feed_item": {
          "$ref": "#/definitions/ItemDefinition"
        }
      }
    },
    "FeedLocation": {
      "type": "object",
      "properties": {
        "uri": {
          "type": "string"
        },
        "title": {
          "type": "string"
        }
      }
    },
    "FeedDefinition": {
      "type": "object",
      "properties": {
        "title": {
          "type": "string"
        }
      }
    },
    "ItemDefinition": {
      "type": "object",
      "properties": {
        "date": {
          "type": "string",
          "format": "datetime"
        },
        "title": {
          "type": "string"
        },
        "content": {
          "type": "string"
        },
        "links": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/Link"
          }
        },
        "authors": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/Author"
          }
        },
        "identifier": {
          "type": "string"
        }
      }
    },
    "Link": {
      "type": "object",
      "properies": {
        "relation": {
          "$ref": "#/definitions/Relation"
        },
        "title": {
          "type": "string"
        },
        "type": {
          "$ref": "#/definitions/MediaType"
        },
        "uri": {
          "type": "string",
          "format": "uri"
        }
      }
    },
    "Relation": {
      "type": "object",
      "properties": {
        "tag": {
          "type": "string"
        }
      }
    },
    "MediaType": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string"
        },
        "subtype": {
          "type": "string"
        },
        "suffix": {
          "type": "string"
        },
        "parameters": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      }
    },
    "Author": {
      "type": "object",
      "properies": {
        "name": {
          "type": "string"
        },
        "email": {
          "type": "string"
        },
        "uri": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}