{
  "type": "object",
  "description": "A ServiceNow change request record.",
  "name": "ChangeRequest",
  "properties": {
    "sys_id": {
      "type": "string",
      "description": "Unique identifier for the change request."
    },
    "number": {
      "type": "string",
      "description": "The human-readable change request number."
    },
    "short_description": {
      "type": "string",
      "description": "A brief summary of the change."
    },
    "description": {
      "type": "string",
      "description": "A detailed description of the change and its purpose."
    },
    "type": {
      "type": "string",
      "description": "The change type: normal, standard, or emergency.",
      "enum": [
        "normal",
        "standard",
        "emergency"
      ]
    },
    "state": {
      "type": "string",
      "description": "The current state of the change request in its lifecycle."
    },
    "priority": {
      "type": "string",
      "description": "The priority level of the change request.",
      "enum": [
        "1",
        "2",
        "3",
        "4"
      ]
    },
    "risk": {
      "type": "string",
      "description": "The risk level assessed for this change."
    },
    "impact": {
      "type": "string",
      "description": "The impact level of this change."
    },
    "category": {
      "type": "string",
      "description": "The category of the change."
    },
    "assigned_to": {
      "type": "string",
      "description": "The sys_id of the user assigned to implement the change."
    },
    "assignment_group": {
      "type": "string",
      "description": "The sys_id of the group responsible for the change."
    },
    "requested_by": {
      "type": "string",
      "description": "The sys_id of the user who requested the change."
    },
    "start_date": {
      "type": "datetime",
      "description": "The planned start date and time for the change."
    },
    "end_date": {
      "type": "datetime",
      "description": "The planned end date and time for the change."
    },
    "cmdb_ci": {
      "type": "string",
      "description": "The sys_id of the configuration item affected by this change."
    },
    "close_code": {
      "type": "string",
      "description": "The close code indicating how the change was resolved."
    },
    "close_notes": {
      "type": "string",
      "description": "Notes recorded when closing the change request."
    },
    "approval": {
      "type": "string",
      "description": "The current approval status."
    },
    "sys_created_on": {
      "type": "datetime",
      "description": "The date and time the change request was created."
    },
    "sys_updated_on": {
      "type": "datetime",
      "description": "The date and time the change request was last updated."
    }
  },
  "$schema": "https://json-structure.org/draft/2020-12/schema"
}