{
  "$ref": "#/definitions/DtTerms",
  "definitions": {
    "DtTerms": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "since": {
            "type": "string",
            "format": "date",
            "description": "ISO 8601 date (YYYY-MM-DD)."
          },
          "until": {
            "anyOf": [
              {
                "anyOf": [
                  {
                    "not": {}
                  },
                  {
                    "type": "string",
                    "format": "date"
                  }
                ]
              },
              {
                "type": "null"
              }
            ],
            "description": "ISO 8601 date (YYYY-MM-DD). Null/omitted if ongoing or unknown."
          },
          "until_latest": {
            "anyOf": [
              {
                "anyOf": [
                  {
                    "not": {}
                  },
                  {
                    "type": "string",
                    "format": "date"
                  }
                ]
              },
              {
                "type": "null"
              }
            ],
            "description": "ISO 8601 date (YYYY-MM-DD). Latest possible end date."
          },
          "identifiers": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "scheme": {
                  "type": "string"
                },
                "identifier": {
                  "type": "string"
                }
              },
              "required": [
                "scheme",
                "identifier"
              ],
              "additionalProperties": false
            }
          },
          "note": {
            "type": "string"
          }
        },
        "required": [
          "id",
          "name",
          "since"
        ],
        "additionalProperties": false
      }
    }
  },
  "$schema": "http://json-schema.org/draft-07/schema#"
}