3270 data streams for the EPI

The data streams implemented for the EPI follow those defined in the 3270 Data Stream Programmer’s Reference. All data flows for the EPI are in ASCII format, and structured fields are not supported. Data flows are defined under the following topics in the 3270 Data Stream Programmer’s Reference:

Be aware that the contents of the data buffer may be code-page converted if the buffer is passed between CICS® systems, in which case the data should be limited to ASCII and EBCDIC characters.

If a CICS transaction issues EXEC CICS SEND MAP and EXEC CICS RECEIVE MAP commands, CICS converts the data from the BMS structure to a 3270 data stream. In this case, the application receives 3270 data from CICS and should return valid 3270 data to be converted for the transaction.