A Transport Map defines the data format of the data sent to the enterprise application and when there is response data, the format of the response data returned by the enterprise application. A transport map gives you the ability to use map variables (that you create) instead of plant floor PLC device variable names as the source or destination of enterprise data. The Transaction Server automatically associates the map variable to a physical destination such as a specific column in a database table. The transport map feature provides a level of control between the factory floor production group and the IT department.