{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "InvoiceLineItem",
  "type": "object",
  "description": "A line item on an invoice",
  "properties": {
    "lineNumber": {
      "type": "string",
      "description": "Line item number on the invoice"
    },
    "purchaseOrderReference": {
      "type": "string",
      "description": "Referenced purchase order number"
    },
    "poLineNumber": {
      "type": "string",
      "description": "Referenced purchase order line item number"
    },
    "description": {
      "type": "string",
      "description": "Item or service description"
    },
    "quantity": {
      "type": "number",
      "description": "Invoiced quantity"
    },
    "buyerPartNumber": {
      "type": "string",
      "description": "Buyer part number"
    },
    "supplierPartNumber": {
      "type": "string",
      "description": "Supplier part number"
    },
    "serviceStartDate": {
      "type": "string",
      "description": "Service period start date"
    },
    "serviceEndDate": {
      "type": "string",
      "description": "Service period end date"
    }
  }
}