{
  "id": "message_id",
  "name": "Message-ID (Email Message Identifier)",
  "status": "stable",
  "doc": "Globally unique identifier of an email message, which the sending client or server writes in the Message-ID header (RFC 5322, section 3.6.4). It has the form <left@right>: the right part is usually the domain name of the host that created it, and the left part is a unique string such as a timestamp with a random suffix. Replies refer to it in their In-Reply-To and References headers.",
  "categories": [
    {
      "id": "internet",
      "name": "Internet"
    }
  ],
  "langs": [
    {
      "id": "common",
      "name": "Common to most languages"
    }
  ],
  "is_pii": false,
  "classification": "identifier",
  "regexp": "^<[^<>@\\s]+@[^<>@\\s]+>$",
  "examples": [
    {
      "value": "<1234@local.machine.example>",
      "description": "Example of RFC 5322, appendix A.1.1"
    },
    {
      "value": "<5678.21-Nov-1997@example.com>",
      "description": "Example of RFC 5322, appendix A.1.2"
    },
    {
      "value": "<testabcd.1234@silly.example>",
      "description": "Example of RFC 5322, appendix A.1.3"
    },
    {
      "value": "1234@local.machine.example",
      "valid": false,
      "description": "No angle brackets"
    },
    {
      "value": "<1234@local.machine.example> <3456@example.net>",
      "valid": false,
      "description": "Two identifiers, as in a References header"
    }
  ],
  "links": [
    {
      "type": "wikipedia",
      "url": "https://en.wikipedia.org/wiki/Message-ID"
    },
    {
      "type": "doc",
      "url": "https://www.rfc-editor.org/rfc/rfc5322.html#section-3.6.4"
    }
  ],
  "translations": {
    "ru": {
      "name": "Идентификатор письма (Message-ID)",
      "doc": "Уникальный идентификатор письма из заголовка Message-ID в форме <левая_часть@правая_часть> (RFC 5322)."
    }
  },
  "type": "datatype"
}