jsonSchema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "question3-9": {
      "type": "object",
      "properties": {
        "answer": {
          "type": "string",
          "enum": [
            "Home improvements (General)",
            "Other"
          ]
        }
      }
    },
    "question3-257": {
      "type": "object",
      "properties": {
        "answer": {
          "type": "string"
        }
      }
    }
  },
  "type": "object",
  "properties": {
    "form_submission": {
      "type": "object",
      "properties": {
        "sections": {
          "type": "object",
          "properties": {
            "3": {
              "type": "object",
              "properties": {
                "questions": {
                  "type": "object",
                  "properties": {
                    "9": {
                      "$ref": "#/definitions/question3-9"
                    },
                    "257": {
                      "$ref": "#/definitions/question3-257"
                    }
                  },
                  "if": {
                    "properties": {
                      "9": {
                        "properties": {
                          "answer": {
                            "enum": [
                              "Home improvements (General)"
                            ]
                          }
                        },
                        "required": [
                          "answer"
                        ]
                      }
                    },
                    "required": [
                      "9"
                    ]
                  },
                  "then": {
                    "required": [
                      "257"
                    ]
                  }
                }
              }
            }
          },
          "required": [
            "3"
          ]
        }
      }
    }
  }
}