{
  "$schema": "http://json-schema.org/draft-04/schema",
  "title": "Subscription",
  "description": "A registration for wanting to receive notifications about resource changes.",
  "type": "object",
  "properties": {
    "id": {
      "description": "Unique identifier for this subscription",
      "$ref": "Iri.json"
    },
    "owner": {
      "description": "Owner of this value quantity",
      "$ref": "Iri.json"
    },
    "event": {
      "description": "Event identifier for the type of event",
      "$ref": "EventId.json"
    },
    "subject": {
      "description": "URI of the resource to watch",
      "$ref": "Iri.json"
    },
    "target": {
      "description": "Target callback URI",
      "$ref": "Iri.json"
    }
  },
  "required": ["owner", "event", "target"],
  "additionalProperties": false
}