# Example of CICS Trigger

This IVP example illustrates how a trigger process delivers data from a CICS application to a TIBCO messaging application through Substation ES.

The CICS application initiates the request by writing the output data to the Substation ES trigger transient data queue (TDQ). The Substation ES gets the trigger based on the defined search criteria for this trigger process. The Substation ES Transformer then processes the data conversions according to the selected conversion rule in the trigger recipe.

After the data has been converted, Substation ES publishes the output message to the IVP Generic Listener.

For more information about the process flow, see the "Messages Flow" section of the TIBCO Substation ES Concepts manual.

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