{
  "$defs": {
    "Stamp": {
      "description": "Stamp defines an official seal of approval from a third party like a governmental agency or intermediary and should thus be included in any official envelopes.",
      "properties": {
        "prv": {
          "$ref": "https://gobl.org/draft-0/cbc/key",
          "description": "Identity of the agency used to create the stamp usually defined by each region.",
          "title": "Provider"
        },
        "val": {
          "description": "The serialized stamp value generated for or by the external agency",
          "title": "Value",
          "type": "string"
        }
      },
      "required": [
        "prv",
        "val"
      ],
      "type": "object"
    }
  },
  "$id": "https://gobl.org/draft-0/head/stamp",
  "$ref": "#/$defs/Stamp",
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}