create an instance of usaddress concode_field_sep QName _PurchaseOrder_QNAME concode_elem_sep QName _Comment_QNAME concode_field_sep JAXBElement<PurchaseOrderType> createPurchaseOrder concode_elem_sep Items.Item createItemsItem concode_elem_sep PurchaseOrderType createPurchaseOrderType concode_elem_sep Items createItems concode_elem_sep PurchaseOrders createPurchaseOrders concode_elem_sep JAXBElement<String> createComment