{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Question definition (question/1)",
  "description": "The canonical form of everything the model sees for one question, whatever wire format it came in. question_id is a hash of this object; see hashing.md.",
  "type": "object",
  "required": ["schema", "type", "instructions"],
  "additionalProperties": false,
  "properties": {
    "schema": { "const": "question/1" },
    "type": { "$ref": "common.schema.json#/$defs/type" },
    "instructions": {
      "description": "Exactly as sent (any JSON value). When the request had none, {\"$name\": <the question's name>}, because some runtimes show the name instead."
    },
    "noul": {
      "description": "noul only. The descriptions of yes and no; null where none was sent.",
      "type": "object",
      "required": ["true", "false"],
      "additionalProperties": false,
      "properties": { "true": {}, "false": {} }
    },
    "options": {
      "description": "choice only, in the order sent.",
      "type": "array",
      "minItems": 1,
      "maxItems": 255,
      "items": {
        "type": "object",
        "required": ["value", "description"],
        "additionalProperties": false,
        "properties": {
          "value": { "$ref": "common.schema.json#/$defs/option_value" },
          "description": {}
        }
      }
    },
    "levels": {
      "description": "score only, level 0 first.",
      "type": "array",
      "minItems": 1,
      "maxItems": 10,
      "items": {
        "type": "object",
        "required": ["label", "description"],
        "additionalProperties": false,
        "properties": {
          "label": { "type": ["string", "null"] },
          "description": {}
        }
      }
    }
  },
  "allOf": [
    {
      "if": { "properties": { "type": { "const": "noul" } } },
      "then": {
        "required": ["noul"],
        "not": { "anyOf": [{ "required": ["options"] }, { "required": ["levels"] }] }
      }
    },
    {
      "if": { "properties": { "type": { "const": "choice" } } },
      "then": {
        "required": ["options"],
        "not": { "anyOf": [{ "required": ["noul"] }, { "required": ["levels"] }] }
      }
    },
    {
      "if": { "properties": { "type": { "const": "score" } } },
      "then": {
        "required": ["levels"],
        "not": { "anyOf": [{ "required": ["noul"] }, { "required": ["options"] }] }
      }
    }
  ]
}