The order item identifier, links the invoice item to an order item.
The purchase order item identifier, links the invoice item to a purchase order item, not used anymore.
The price unit, excluding VAT, its the price sale / Unit of measurement count, commonly same as PriceSale.
{ "id": 0, "invoiceId": 0, "lineNumber": 0, "statusId": 0, "partNo": "string", "externalPartNo": "string", "productName": "string", "stockUnitOfMeasurementCount": 0, "priceUnitOfMeasurementCount": 0, "warehouseId": 0, "locationId": 0, "quantity": 0, "currencyId": 0, "vatRate": 0, "costUnit": 0, "priceSale": 0, "discountPercentage": 0, "discountAmount": 0, "lineAmount": 0, "deliveryMode": "string", "isPartDelivery": true, "deliveryDate": "2019-08-24T14:15:22Z", "salesRepContactId": 0, "ledgerAccount": "string", "department": "string", "centre": "string", "transId": 0, "created": "2019-08-24T14:15:22Z", "createdBy": 0, "updated": "2019-08-24T14:15:22Z", "updatedBy": 0, "orderItemId": 0, "purchaseOrderItemId": 0, "lineNumberString": "string", "priceUnit": 0, "quantity2": 0, "clientId": 0, "orderItem": { "id": 0, "orderId": 0, "lineNumber": 0, "parentLineNumber": 0, "statusId": 0, "partNo": "string", "externalPartNo": "string", "productName": "string", "stockUnitOfMeasurementCount": 0, "priceUnitOfMeasurementCount": 0, "warehouseId": 0, "locationId": 0, "qtyOrdered": 0, "currencyId": 0, "vatRate": 0, "costUnit": 0, "priceSale": 0, "discountPercentage": 0, "discountAmount": 0, "lineAmount": 0, "deliveryMode": "string", "isPartDelivery": true, "expectedDeliveryDate": "2019-08-24T14:15:22Z", "confirmedDeliveryDate": "2019-08-24T14:15:22Z", "salesRepContactId": 0, "ledgerAccount": "string", "department": "string", "centre": "string", "transId": 0, "externalStatusText": "string", "created": "2019-08-24T14:15:22Z", "createdBy": 0, "updated": "2019-08-24T14:15:22Z", "updatedBy": 0, "lineNumberString": "string", "priceRecommended": 0, "priceCatalog": 0, "priceStandard": 0, "clientId": 0, "childTypeId": 0, "invoiceItem": [ … ], "infos": [ … ] } }