[
	[
		"/ArrayOfInvoice",
		"=",
		"namespace"
	],
	[
		"/ArrayOfInvoice/Invoice",
		"=",
		[
			"inv",
			[
				[
					"Invoice_date",
					"=",
					"ord.order_date"
				],
				[
					"/ArrayOfInvoice/Invoice/InvoiceRows/InvoiceRow",
					"=",
					[
						"invr",
						[
							[
								"Row_productcode",
								"=",
								"ordr.product_id"
							]
						]
					]
				]
			]
		]
	]
]