Writing programs for CICS DTP

CICS® enables DTP by using the LU 6.2 APPC mapped conversations commands. The following sections describe how to code a simple DTP program:

• Conversation initiation and the front-end transaction
• Back-end transaction initiation
• Transferring data on the conversation
• Communicating errors across a conversation
• Safeguarding data integrity
• Ending the conversation
• Checking the outcome of a DTP command

You need to manage the changing conversation states of your program. A description of how you test the state, and a complete list of all the conversation states, is given in:

• Testing the conversation state
• The conversation state tables

The APPC commands are summarized in:

• Summary of CICS commands for APPC mapped conversations