When the SAP system you are connecting to was created, RFC interface modules were defined and parameter types specified. The Transaction Server supports the following RFC interface module parameter types:
Import — Data sent from the Transaction Server to the SAP system. The data is used as input to SAP RFC interface.
Export — Data is returned from the SAP system to the Transaction Server. The data is exported from the SAP RFC interface.
Changing — Data that is passed as import and export.
Table — Allows the manipulation of multiple rows of data which requires the use of arrays of logical variables. In addition, tables can be used as import, export, and changing parameters. Logical variables mapped to parameters within a table must all have the same row count. For more information, see Table parameters.