{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/PurchaseOrder",
  "title": "PurchaseOrder",
  "type": "object",
  "description": "A complete purchase order document representing a buyer's commitment to purchase goods or services from a supplier through the SAP Ariba Network",
  "required": [
    "orderId",
    "orderDate",
    "supplier",
    "currency",
    "lineItems"
  ],
  "properties": {
    "orderId": {
      "type": "string",
      "description": "Unique purchase order identifier (UniqueName) including version",
      "examples": [
        "PO-2025-001234"
      ]
    },
    "erpPONumber": {
      "type": "string",
      "description": "ERP system purchase order number. Unique ID for every version of the purchase order in the backend ERP system.",
      "example": "example_value"
    },
    "versionNumber": {
      "type": "integer",
      "description": "Supplemental version number of the order. Incremented with each change request.",
      "minimum": 1,
      "example": 10
    },
    "orderDate": {
      "type": "string",
      "format": "date-time",
      "description": "Date and time when the purchase order was created",
      "example": "2026-01-15T10:30:00Z"
    },
    "status": {
      "$ref": "#/components/schemas/PurchaseOrderStatus"
    },
    "orderMethodCategory": {
      "type": "string",
      "description": "Ordering method category indicating how the order was generated (e.g., manual, automatic, blanket release)",
      "example": "example_value"
    },
    "supplier": {
      "$ref": "#/components/schemas/SupplierReference"
    },
    "buyer": {
      "$ref": "#/components/schemas/BuyerReference"
    },
    "currency": {
      "type": "string",
      "description": "ISO 4217 currency code for the order",
      "pattern": "^[A-Z]{3}$",
      "example": "example_value"
    },
    "totalAmount": {
      "$ref": "#/components/schemas/Money"
    },
    "taxAmount": {
      "$ref": "#/components/schemas/Money"
    },
    "shippingAmount": {
      "$ref": "#/components/schemas/Money"
    },
    "paymentTerms": {
      "$ref": "#/components/schemas/PaymentTerms"
    },
    "purchaseOrg": {
      "type": "string",
      "description": "Purchasing organization identifier",
      "example": "example_value"
    },
    "purchaseGroup": {
      "type": "string",
      "description": "Purchasing group identifier",
      "example": "example_value"
    },
    "companyCode": {
      "type": "string",
      "description": "Company code for the buying entity",
      "example": "example_value"
    },
    "shipTo": {
      "$ref": "#/components/schemas/Address"
    },
    "billTo": {
      "$ref": "#/components/schemas/Address"
    },
    "lineItems": {
      "type": "array",
      "description": "Line items contained in the purchase order",
      "items": {
        "$ref": "#/components/schemas/PurchaseOrderLineItem"
      },
      "minItems": 1,
      "example": []
    },
    "requisitionId": {
      "type": "string",
      "description": "Reference to the originating purchase requisition",
      "example": "500123"
    },
    "contractId": {
      "type": "string",
      "description": "Reference to a master agreement or contract",
      "example": "500123"
    },
    "comments": {
      "type": "string",
      "description": "Header-level comments on the purchase order",
      "example": "example_value"
    },
    "createdDate": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the order was first created",
      "example": "2026-01-15T10:30:00Z"
    },
    "lastModifiedDate": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp of the most recent modification",
      "example": "2026-01-15T10:30:00Z"
    },
    "closedDate": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the order was closed",
      "example": "2026-01-15T10:30:00Z"
    }
  }
}