{
  "type": "object",
  "properties": {
    "hold_id": {
      "type": "integer",
      "description": "Internal hold identifier"
    },
    "patron_id": {
      "type": "integer",
      "description": "Internal patron identifier"
    },
    "hold_date": {
      "type": ["string", "null"],
      "format": "date",
      "description": "The date the hold was placed"
    },
    "biblio_id": {
      "type": "integer",
      "description": "Internal biblio identifier"
    },
    "pickup_library_id": {
      "type": ["string", "null"],
      "description": "Internal library identifier for the pickup library"
    },
    "cancelation_date": {
      "type": ["string", "null"],
      "format": "date",
      "description": "The date the hold was cancelled"
    },
    "notes": {
      "type": ["string", "null"],
      "description": "Notes related to this hold"
    },
    "priority": {
      "type": ["integer", "null"],
      "description": "Where in the queue the patron sits"
    },
    "status": {
      "type": ["string", "null"],
      "description": "A one letter code defining what the status of the hold is after it has been confirmed"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp for the latest hold update"
    },
    "item_id": {
      "type": ["string", "null"],
      "description": "Internal item identifier"
    },
    "waiting_date": {
      "type": ["string", "null"],
      "format": "date",
      "description": "The date the item was marked as waiting for the patron at the library"
    },
    "expiration_date": {
      "type": ["string", "null"],
      "format": "date",
      "description": "The date the hold expires"
    },
    "lowest_priority": {
      "type": "boolean",
      "description": "Controls if the hold is given the lowest priority on the queue"
    },
    "suspended": {
      "type": "boolean",
      "description": "Controls if the hold is suspended"
    },
    "suspended_until": {
      "type": ["string", "null"],
      "format": "date-time",
      "description": "Date until which the hold has been suspended"
    },
    "item_type": {
      "type": ["string", "null"],
      "description": "If record level hold, the optional itemtype of the item the patron is requesting"
    },
    "item_level": {
      "type": "boolean",
      "description": "If the hold is placed at item level"
    }
  }
}