Logical record data is usually of interest only to the transaction programs. It could, for example, consist of a bank balance inquiry and reply.
The DATAFLU and DATACON macroinstructions provide new data and, additionally, flush the SEND buffer. The DATACON macroinstruction also sends a confirmation request. The FLUSH macroinstruction does not provide new data to VTAM® but causes VTAM to send buffered data to the partner LU.
When sending data, the application program sets the AREA field of the RPL to point to the conversation data and the RECLEN field to the length of the data being sent. (See Buffer list requirements for details on using buffer lists to send data.)