Bar code output from the Oracle® environment is traditionally accomplished through third-party software. However, Oracle's Warehouse Management System (WMS) and Mobile Supply Chain Applications (MSCA) offer a new approach that can simplify bar code label printing. Oracle WMS and MSCA produce output in XML data streams, instead of a proprietary Oracle format. Zebra Technologies has embedded an XML parser in its XML-enabled XiIIIPlus printers, so output from Oracle WMS and MSCA is natively understood by the printer without additional middleware or server hardware. This white paper describes the middleware and direct-connect bar code printing options for Oracle WMS and MSCA, explains the system requirements for each, and provides guidance as to when each approach is best suited to particular environments.